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JULY 2021
E L E C T R I C A L N E W S
www.sparkselectricalnewsmagazine.co.za
REGULARS: CONTRACTORS’ CORNER | BUYERS' GUIDE: CABLES AND CABLE ACCESSORIES | FEATURES: CABLES AND CABLE ACCESSORIES | STANDBY AND EMERGENCY POWER | LIGHTING
‘ELECTRICAL CLUSTER’ GIVES MORE POWER TO CUSTOMERS
A
t the beginning of March this year, Hudaco Industries’ ‘Electrical Clus- ing in the market, yet Three-D’s primary goal right now is service. “The only
ter’, comprising Three-D Agencies, Hudaco Power Transmissions, way you are going to get and retain business in these times, is service.”
Powermite and Varispeed, relocated to new offices in Linbro Park,
CONTINUED ON PAGE 4
Johannesburg, consolidating their businesses into one building. Although the
companies still operate as separate entities, the move has numerous
benefits, not least capitalising on the synergies between the businesses.
Established in 1977, Three-D Agencies has for the past 40 Years
provided the highest quality range of cable accessories to a wide spec-
trum of South African industries. Today Three-D sources products from
leading cable accessory manufacturers situated across the globe, help-
ing the business to grow into one of Southern Africa’s leading cable
accessory companies. “The move came about because of COVID-19
effectively,” explains Three-D managing director, Ian Downard. “It pro-
vided a good opportunity to bring costs down, consolidate ideas, and
bring everyone into one building where we could all talk. It is working
well, and we have been able to feed off each other already.”
After the shock of the move – which occurred during a time of load
shedding across both premises, and before a generator was installed
– the company has settled down and reported record high sales in
May. “Our new location gives our customers, which are often also those
of our sister companies as well, more power,” notes Downard. Mark
Jenkins, Three-D sales director, concurs: “It is more central and user-
friendly here, and is accessible to many customers. We are also very
visible along the highway with fantastic signage, and as a result, enquir-
ies have almost doubled in the past months.”
Jenkins also notes that the company has scope to grow in the new
building. “We now have an impressive 8500m2 warehouse component
compared to 1600m2 at our previous premises in Meadowdale, which
has also allowed us to conform our bulk stock in such a way that most
of the stock is immediately visible and easier to reach.” Since the move,
the company has boosted its sales division with new employees, and
reshuffled some staff within the company to streamline its processes.
A focus on the customer
Jenkins says that there has been a shift in the way customers are buy-
2
CONTRACTORS’ CORNER
Playing an important role in steadying the power supply and enhancing power quality
R
egenerative energy such as solar and wind power conversion systems (PCSs) are equipped with capacitive type load and phase lag mode under a
power often have unstable and intermittent on-grid constant current output and off-grid current inductive type load.
power supply problems that affect the power voltage modes, as well as charge/discharge transfer The Chroma 17020 and 17040 series Battery
grid stability. An energy storage system (ESS) can and other features. This makes testing a PCS even Pack tester can set battery capacity and behavior
reduce the impact of regenerative energy in grid more complicated and requiring even more instru- curve and simulate all kinds of battery pack
connection, offer stable power grid operation, and ments to fit its many features. conditions. Chroma recently launched the new
can also adjust the peak load to maintain the power Chroma ATE Inc. offers the 61800 series 62000D series bidirectional dc power supplies, two
supply balance, so giving the user various applica- Grid Simulators with optional ac load function: quadrant design that allow power from the DUT to be
tions and benefits. multifunctional devices that cannot only converted back to the utility grid. The 62000D can
The ESS is an important part in developing smart simulate various output voltages and frequencies provide both power source and load characteristics
grid and micro-grid, which can be used to balance applicable to PCS on-grid function testing, but to simulate the battery’s charge/discharge behaviour,
the power load, steady the power supply, and en- can also execute four quadrant ac load operation so eliminating the risks and inconveniences of using
Chroma PCS ATS hance the power quality. Different from PV inverters, and simulate current phase lead mode under a a real battery.
Along with the diverse developments and applica-
tions of energy storage technology, various countries
have implemented regulations on these technolo-
gies, such as GB/T 34120, GB/T 34133, IEC62933,
and SGSF-04-2012-07, to encourage a sound and
sustainable development of the energy storage in-
dustry. Chroma combined our vast experience in the
PV industry with the international relevant regulatory
requirements and compiled a comprehensive over-
view of these standards’ goals and methods in our
Power Conversion System (PCS) Test Guide. The
guide contains tests on PCS performance, PCS in-
put and output characteristics, PCS protection char-
acteristics, and PV characteristics test, and provides
customers with test references on product verifica-
tion. Download the PCS Test Guide now for free!
www.chromaate.com/en/questionnaire_info_32
This PCS Test Guide offers descriptions of over
20 test items:
• PCS Performance Tests: Charge/discharge
transfer time, active grid mode and islanded
mode switch.
• PCS Input and Output Characteristics Test:
Rectification charging efficiency, PCS efficiency
in grid mode, and PCS efficiency in islanded
mode.
• PCS Protection Characteristics Test: Overload in
grid mode, overload in islanded mode…
• Photovoltaic (PV) Characteristics Test: MPPT
efficiency andPV conversion efficiency.
Driving innovation to success
Founded in 1984, Chroma is a world leading sup-
plier in Automatic Testing Equipment (ATE), includ-
ing electronic tests and measurement equipment
and systems, for various ICT industries. Chroma also
provides integrated and customized turnkey solu-
tions through Test and Measurement Instruments,
Automatic Test Systems and Manufacturing Execu-
tion Systems.
The focal points of Chroma are tests and meas-
urements on power electronics, passive component,
electrical safety, video and colour, LCD/LCM, auto-
motive electronics, and semiconductor industries.
More importantly, Chroma also drives itself toward
clean technology by providing turnkey test solutions
in photovoltaic, advanced battery and storage, LED,
electric vehicles, electronic paper and other ongoing
new eco-driving industries.
Turnkey solutions: To fulfil the need of complete
test solutions from the market, Chroma not only
provides test & measurement instruments, but also
integrates with automated systems and manufactur-
ing execution systems as a turnkey solution, which
brings more value and service to the customers and
helps customers in terms of time saving, cost saving,
and one-stop full service.
A history of innovation: Consisting of a large per-
centage of R&D engineers, Chroma puts large in-
vestment in research and development each year to
ensure its leading technology. Core technologies in
power electronics and optics have been the corner-
stones for Chroma to drive forward to various new
frontiers to provide innovative test solutions with
precision, reliability, and uniqueness.
Chroma has branch offices in Europe, the United
States, Japan, Korea, China, and Southeast Asia
chartered to deliver innovative technologies with
high value-added service to satisfy our global cus-
tomers' demands.
Enquiries: www.chromaeu.com
JULY 2021 SPARKS
ELECTRICAL NEWS
SPARKS DIGITAL 3
12 YouTube channels every electrician should be watching
resistors to big fat motors. The best part of the videos is the circuit such mistakes must be avoided. Many people feel some of his experi-
drawings that he draws on paper to explaining the core of workings. ments are too dangerous. However, the fact is that he knows the result of
The video and audio quality are superb, and editing is done up to the each mistake he makes. He is a very smart man.
mark. The DIY or BUY playlist is probably the most viewed content
on the channel. SparkFun Electronics
The channel is highly professional in terms of video production qual-
S33 Electrical ity. The video scripts are to the point. The content discussed here is
With a healthy dose of all things electric, S33 Electric brings you a mostly new electronic chips and DIY projects based on them. How-
varied dose of electrical content. ever, the team also discusses other engineering-related topics. The
channel has a website where you can buy the latest electrical com-
Electronoobs ponents.
If you are interested in electronics, 3D printing, or just want to build
something, here you will learn all that. The channel is very similar to Electronics Hub
the Great Scott channel. The creator of this channel discusses mostly ElectronicsHub.org provides the best information about various elec-
YouTube has fast become one of the best ways to stay on top of PCB components. The channel also has its own DIY playlist. The ex- tronics circuits and project ideas on electronics, electrical, robotics, and
what is happening in the electrical trade. Here is a list of the best planation is very clear and video production quality is superb. communication concepts. It is one of those special channels with true
YouTube channels for electricians for the next time you have some DIY electronic projects feel.
downtime. Craig Michaud – Electrical Instructor The projects made on this channel, use cheap and easy to find com-
Craig Michaud is an electrical instructor at Porter and Chester Insti- ponents, with not so complex electrical circuits. However, the channel
Electrician U tute in Rocky Hill, Connecticut and has been kind enough to put a lot does not have an in-depth explanation of every component used in
Run by master electrician Dustin Stelzer, Electrician U is “an online of his instruction on this channel. projects.
learning community for Electricians who are seeking a far deeper
understanding of the invisible force that they work with.” If you are Klein Tools
committed to taking the mastery of your craft to the next level, this The trusted name in electrical tools also has an outstanding YouTube
channel is a must-watch. channel with everything from how-to’s to new tool announcements.
Mike’s Tool Shed Journey 2 Master
Mike has been an electrician for 17 years, and Mike’s Tool Shed is Another channel by Dustin Stelzer (of Electrician U), Journey 2 Master
where he shares his thoughts and reviews on all the tools of the trade, follows Dustin as “a young Master Electrician starting up an electrical
plus other hard-earned bits of trade wisdom for those just starting out. contracting company to building up the best electrical company on
the planet.”
Modern Electrician
“Your favourite electrician Doug” injects a little humour into electrician ElectroBoom
life, such as walking you through how to name your tools after famous This electronics/electrical loving YouTuber doesn’t go that deep into the
people. working of each component. However, the style of delivery of the con-
tent is superb. The best part is the comedy and his facial expressions
Great Scott that he makes in his videos. This is for sure the best electrical engineer-
This is one of the best YouTube channels to learn about the basics ing channel to watch when you get bored with learning.
of electronics. The guy explains the basics of everything from small He makes a lot of mistakes in his videos to show the audience that
Fluke 324 True RMS Clamp Meter An exclusive look into
unboxing and demo HellermannTyton’s world class
Johannesburg facility
Take a look at HellermannTyton South Africa's world class facilities
strategically located in Linbro Business Park, Johannesburg.
HellermannTyton is a leading manufacturer and supplier of products
for fastening, fixing, installing, connecting, insulating, protecting and
identifying electrical cables and data network infrastructure.
Scan the QR code to watch
https://www.youtube.com/
watch?v=qmQfZrFc7zA
See more by scanning the QR code
An unboxing and demonstration of the Fluke 324 True RMS Clamp Me- https://www.youtube.com/
ter. It is rated at a maximum of 400 A. Due to its 400 A capacity, Catego- watch?v=gax50nvfJKo
ry III (600 V) and Category IV (300 V) safety ratings, this is ideal for all
residential and many commercial and industrial applications. It includes
temperature measurement and a dedicated backlight button.
Did you miss our June issue?
Cover story An electrician’s guide to becoming self-employed
In May, Voltex East Rand and Voltex George moved to new, bigger prem- If you are thinking about becoming a self-employed electrician, we
ises. These branches boast cutting-edge product, lighting and solar dis- would always recommend working with an experienced electrician first,
plays that enhance the customer experience. once you have completed your training. This will allow you to gain con-
fidence and experience before going it alone. Once you feel confident
The top podcasts for electrical contractors that you have gained enough experience and are competent to go it
If you are on the road most of the day, driving between jobs, why not use alone, you may be ready to take the next step.
your time to brush up on your electrical knowledge? We have compiled
a list of the top podcasts for electricians, a blend of interesting, fun and Visit www.sparkselectricalnewsmagazine.co.za to read our June 2021 is-
knowledge building shows to keep you up-to-date and entertained. sue, as well as previous beack issues of the magazine
SPARKS
ELECTRICAL NEWS
JULY 2021
4
CONTRACTORS’ CORNER
CONTINUED FROM PAGE 1
‘ELECTRICAL CLUSTER’ GIVES MORE POWER TO CUSTOMERS
“We are still small enough to realise that the cus- want the customer to see the full range of our prod- One such new partnership is Conta-Clip, a German systems, Conta-Electronics for electrical and elec-
tomer is king, not the other way around,” points out ucts. In fact, some of our products today have been company which manufactures terminals and solutions tronic switchgear cabinet components, Conta-Label
Downard, and as such, Downard and Jenkins have redesigned from customer feedback at the shows, so for panel builders. “We believe we have a bigger solu- for marking systems, Conta-Box for housings, and
maintained their presence out on the road. “We are we take what the customer says to heart.” tion than anyone else at the moment in this sector, es- Conta-Con for PCB terminal blocks and connectors.
not the type of guys to sit behind our desks; we are The company is constantly looking to diversify into pecially with the KDSClick system,” says Jenkins. The “We are excited about this and have also brought out
out there with the customers, and they always have a different products and extend its basket, but is careful new KDSClick IP66 cable entry system from Conta- a new panel catalogue which is specifically targeted
direct line to Ian and myself,” says Jenkins, continuing, of what products it pick.s “We have world class prod- Clip allows for quickly feeding open-ended cables at panel builders, providing the total range of the
“We’re out there, have our fingers on the pulse and un- ucts and are very particular about the products we or pre-assembled cables into enclosures or through products for this industry.”
derstand the market because we are there at the coal bring in – we don’t bring in rubbish. We believe in the cabinet walls. With sealing elements that fit tightly, Despite some challenges, including the impact of
face speaking to the customers.” At the time of the in- brands we supply, and Ian is constantly looking for new the system ensures DIN EN 62444 compliant strain COVID, rising copper and plastic prices as well as
terview, Downard, Jenkins and their team had recently products. Previously, he would visit shows all over the relief for the cables. Conta-Clip’s products are divided longer lead times on stock arriving from overseas,
returned from a customer day in Kimberley. “We put world, now he scours the internet, gets samples in to into six categories: Conta-Connect for terminal blocks the future looks bright for Three-D Agencies. “The
on a proper show when we go out,” says Downard, “We test, and we do our due diligences,” says Jenkins. and accessories, Conta-Cable for cable management synergy of the companies here at our new facility
can only improve as we work together and learn each
other’s businesses, so the opportunities are there,”
says Jenkins. “We are very happy in our new space,
but I have seen it before where you think the building
is big enough, and 18 months down the line you are
running out of space. If that happens, then we are do-
ing something right.”
Hudaco Industries’ electrical cluster at
a glance
Three-D Agencies: Distributor of electrical cable ac-
cessories.
Powermite: Distributor of electric cabling, plugs,
sockets, electric feeder systems and crane materials.
Varispeed: Distributor of controllers, monitors and
regulators of the speed of standard ac motors.
Hudaco Power Transmissions: Distributor of geared
motors, helical gearboxes, frequency inverters and
electrical motors.
The Conta-Connect range
from Conta-Clip
Stud connection system
Terminals with Push-in connection system
Terminals with screw connections and special terminals
Terminals with tension-spring connection
Enquiries: +27 (0)11 392 3804
JULY 2021 SPARKS
ELECTRICAL NEWS
CONTRACTORS’ CORNER 5
ACDC Dynamics and ACDC Express widen infrastructure on the East Rand
ACDC Express, a company owned by ACDC Dynamics,
has announced that it will be expanding its existing store
in Longmeadow, Edenvale, during the first half 2021. The
new infrastructure will consist of a new section offering
a lighting floor and an expansion consisting of a wider
range of solar, tools, security and more.
To celebrate the expansion, the company hosted a
customer day on 28 and 29 May 2021 where prod-
uct specialists took visitors on a tour of the newly re-
vamped ACDC Express store.
In the words of Mario Maio, CEO of ACDC Dynamics,
the company’s Customer Days are “dedicated to our
customers. As the leading manufacturer in electrical,
electronics, solar, tools and pumps, we make
products to make our customers’ lives convenient
and our Customer Day exemplifies this approach.”
ACDC Dynamics is known to make a series of
products and solar is a new addition to this substantial
list of offerings. With South Africa faced with random
power cuts, this is one of the many beneficial products
the company manufactures. ACDC Dynamics would
like to inform its customer that the company appreci-
ates their patience and would love to introduce them
to the new store.
The launching of the ACDC Express will be highly
beneficial for customers as it will allow them an ex-
traordinary retail experience with a “wow factor”.
Seno Monageng, marketing co-ordinator at ACDC
Dynamics, explains that 496 staff members are em-
ployed at the 2 000 m2 Longmeadow branch, which
stocks a whopping 95 771 active line items. She
believes that a lifestyle shopping experience for the
electrical contractor and homeowner sets the store
apart from its competitors.
“That and, of course, our extensive range of products,”
she says. “ACDC Dynamics is a true one-stop-shop.”
ACDC Dynamics has experienced unprecedented
growth as a direct result of challenging work and
continued high demand for products. In March this
year, the company completed its new facility to ac-
commodate increased capacity and newer technol-
ogy, as well as to tap into a new market.
“We have expanded our store so that we can show-
case all our products, along with informative displays
and a coffee shop. We also offer all our customers, in-
cluding electrical contractors, a loyalty card where the
shopper can earn points while shopping. With those
points, they can purchase at a discounted rate. Once
signed up with ACDC Dynamics, you can also get dis-
counts on certain products,” she says.
In Cape Town, ACDC Dynamics’ new Western
Cape headquarters is located at Richmond Southern
Close. In the 36th year of service to its customers,
ACDC Dynamics will have a complete manufactur-
ing facility and sales office at its new headquarters in
Richmond Park, Cape Town.
Enquiries: +27 (0)10 202 3300
Theme for the 2022
Africa Energy Indaba
announced
A
frica’s energy potential, especially renewable
energy, is enormous, yet only a fraction of it
is being currently employed. The 14th edition
of the African Energy Indaba will focus on unlocking
business growth and investment opportunities to en-
able deal flow. The conference will discuss, debate,
and seek solutions to enable adequate energy gen-
eration across Africa. A diverse group of luminaries
and high-profile speakers will share their real-world
insights about the changing energy landscape in Af-
rica.
This showcase will provide a platform for compa-
nies to demonstrate their commitment to providing
the much-needed solutions and services that will en-
able the African continent to embrace the challenges
arising from its demands. The 2022 event will take
place as a physical event at the CTICC in Cape Town,
South Africa from 1-2 March.
Enquiries: www.africaenergyindaba.com
SPARKS
ELECTRICAL NEWS
JULY 2021
6
CABLES AND CABLE ACCESSORIES
Oscilloscope vs. multimeter: Choosing the right tool for testing Selecting your electrical cable
S
and troubleshooting electing your electrical cable is one of the most important steps in
ensuring the longevity of your electrical installation and the correct
T
he difference between an oscillo- running thereof. SANS 10142 carries an intense array of tables that
scope and a digital multimeter is sim- will be used in this selection process.
ply stated as ‘pictures vs. numbers.’ A
digital multimeter is a tool for making pre- Step 1: Load determination
cise measurements of discrete signals, ena- The first step is to decide exactly what the required load is and its characteris-
bling readings of up to eight digits of resolu- tics are. That is to say, as an example, 100 A motor load that is to run daily for
tion for the voltage, current or resistance of a two eight-hour shifts, for instance. The motor is also 3-phase DOL preferred.
signal. An oscilloscope is designed to depict Location 25 m away from the DB.
waveforms visually to show signal strength,
wave shape and the value of a signal. But Step 2: Ambient derating
how does the difference between numbers The anticipated local ambient temperature should also be stated at this time
and pictures translate to real-world testing or as the cable would require derating, possibly if the daily ambient temp ex-
troubleshooting? ceeded 30°C.
Why use a digital multimeter? Fluke 87V MAX Industrial heavy-duty multimeter Step 3: Possible cable type preferred
Handheld digital multimeters typically have From copper types available, we could use 3/4 core or single cores. The 3/4
3,5 to 4,5 digits of resolution and good ac- lent to a 3,5 to 4-digit digital multimeter. core is probably more popular but the method from the supply DB to the load
curacy. They are portable and lightweight, One of the advantages of the oscillo- must be chosen. This is also a major point of selection as the cable method
used typically for front-line testing and scope over the multimeter is that oscillo- does determine the load capability of your cable.
general-purpose measurements. They also scopes can also display complex signals
contain advanced functions for special- (the ‘picture’ part in the adage) visually. A Step 4: Voltage-drop maintained
purpose testing, such as: transient signal that may pose a threat to There appears to be a general perception that a 5% voltage drop is mostly
• Min/max a system can be displayed, measured, and allowable as per SANS 10142, so at this time, any cable selected as probable
• Conductance isolated with an oscilloscope. It will also must either be checked by calculation or maximum cable length tables.
• Relative reference graphically show distortion and noise that
• Duty cycle/pulse width may be present in the signal. Step 5: Method of delivery
Oscilloscopes can be either line or bat- Depending on the cable routing/method of delivery, additional derating may
Logging tery powered; they can be big or small. be required.
You can also find high-accuracy (5 to 8 Battery power and smaller size, for port- Fluke 120B Industrial Many of the above steps may have been done previously and do not have
ScopeMeter handheld
digits resolution), bench-type, line-pow- ability, are typically required for field use. Oscilloscope to be done continually from these first principal steps. The supply side of
ered digital multimeters that are not in- Some oscilloscopes have built-in multim- the many municipalities in South Africa have recognised standards as the
tended for field use. These digital multime- eters like the Fluke 120B ScopeMeter, giv- when testing or troubleshooting machine loads are standardised in many ways. This can obviously make life far easier
ters are used in the lab, mostly for research ing the user both numbers and pictures. In controls or other complex systems, or when for the electrical staff. Many of these supply authorities have also introduced
and development or for production sys- many cases, these kinds of oscilloscope doing electronic design work, an oscilloscope aluminium cables due to the theft risk of copper. Aluminium brings with it a
tems. An advanced bench precision digital can replace a multimeter. is needed. select range of challenges to ensure that corrosion on site does not reduce
multimeter can cost as much as a portable Industrial electronic applications like automa- reliability, especially in the humid coastal areas. On no account must Al/Cu
oscilloscope. Oscilloscope vs. multimeter tion and process control: an oscilloscope with be coupled together directly.
Be sure to keep your digital multimeter two isolated inputs and 60, 100, or 200 MHz Even if the cable has been correctly chosen and specified, it has to be care-
Why use an oscilloscope? with you for any electrical work. Grab one bandwidth is the choice. fully ended and connected in order to control the localised heating that can
Oscilloscopes are designed for engineer- to make high-precision checks of voltage, Industrial machine applications measuring easily result in a connection burnout, the so-called hot spot which will wreck
ing work or troubleshooting systems current, resistance, frequency, and other three-phase power electronics, or three-axis the joint and potentially also the protection breaker.
that might contain complex signals that electrical parameters. If a red flag is raised control systems comparing and contrasting In both images below, you can see an electrical connection being made via
send at speeds much faster than a digi- with your multimeter, you may need to grab multiple signals: an oscilloscope with four iso- a steel bolt. This will result in hot connections. Steel is not to be considered
tal multimeter can capture. Scopes have an oscilloscope or more powerful tool to lated input channels and 100 or 200 MHz an electrical conductor from the power current perspective. This shows a to-
much faster measurement engines and diagnose further. bandwidth is ideal. Industrial network applica- tal lack of knowledge of what is to be achieved with a low resistance power
much wider measurement bandwidths Reach for an oscilloscope if you want tions: some oscilloscopes add industrial net- connection. Similarly, a misplaced steel washer can cause a major incident if
than digital multimeters, but typically do to make both quantitative and qualita- work physical layer analogue measurement incorrectly placed between contacts.
not have the same accuracy and resolu- tive measurements. For general-pur- algorithms to validate the network health.
tion strength as a multimeter. Oscillo- pose maintenance or general electronic By Kevin Flack
scopes generally have a resolution equiva- testing, a digital multimeter is fine, but Enquiries: +27 (0)10 595 1821 Flack has recently retired from industry and believes he still has valuable in-
depth knowledge of the South African electrical landscape due to wide experi-
ences gained in his 45+ year working career. He is keen to explore the training
arena so that this can be passed on to the youth so as to benefit their practical
ability in the electrical field. In these trying COVID-19 times, Flack can provide
online training to keep your staff up to date on all aspects of circuit breaker
deployment.
Email kevin.flack@outlook.com
JULY 2021 SPARKS
ELECTRICAL NEWS
CABLES AND CABLE ACCESSORIES 7
An electrician’s guide to a domestic rewire
E
lectricians are called upon to carry out • Shaving points. • Light fittings. sure that all circuits are protected and a clear path
many aspects of electrical work, from re- • Television aerial sockets. • Wiring electric fans. to earth is in place in the event of a fault within
pairing or replacing sockets or light fit- • Hard-wired burglar alarms. • Cookers and extractor hoods. the installation. All new electrical installations are
tings to modifications and new circuits, as well as • Telephone points. classed as notifiable work, this means that the work
new build and commercial installations. However, • Data. How long will it take? must be carried out and/or signed off by a compe-
probably the least favourite of all is the rewire • Speaker cabling. Assuming there are no hidden surprises, a typical tent person.
and, potentially worse still, is the rewire of an in- • Any hidden cabling. kitchen rewire should take two days to complete. A Rewires, along with all electrical installations or
habited home. three-bedroom house should take two days to first fix modifications, should be carried out by a compe-
Old or faulty electrics can be a serious fire haz- Second fix involves: and two days to second fix. Larger properties will take tent electrician.
ard, which at worst could lead to injury or electrocu- • Connecting the consumer unit. longer.
tion. Not only is old wiring dangerous but it is also • Connecting the geyser, under-floor heating and
not capable of coping with the demands of modern air-conditioning controls. The importance of earthing
living. • Faceplates for sockets and switches. Earthing is a vital part of any electrical work to en- Source: www.tradeskills4u.co.uk
If you have been asked to quote for a full house
rewire or to perform significant alterations to a
home, then the Building Regulations under Part P
come into force.
When is a rewire necessary?
Firstly, you should always meet the client where
the work is to be carried out, to get a clear under-
standing of what is required prior to completing
your estimate of work/costs. You can also at this
stage assess the feasibility of the project and de-
termine how much to charge.
A full rewire should be considered if:
• A property is more than 25 years old and hasn’t
been upgraded to bring it up to the current re-
quirements.
• If major remodelling work is required that con-
stitutes a material alteration, as defined by the
Building Regulations, it is likely that a part- or full
rewire of the property will be required. This would
include upgrading the consumer unit.
• If a property is being extended, or a garage or
attic is being converted, this could constitute new
work. Therefore, all new wiring will have to con-
form to the latest standards. Existing wiring will
have to be improved to ensure it can carry the
additional loads safely.
• If, during a periodic test, it is discovered that the
cable insulation readings are below acceptable
levels.
How to tell if a property needs a rewire
A good starting point is to check the type of
electricity meter and fuse box (consumer unit).
Modern consumer units will have circuit break-
ers and residual current devices (RCDs). Old fuse
boxes will have old-fashioned rewireable fuses.
You can also tell by inspecting exposed parts
of the wiring as modern electrical installations are
wired using grey or white PVC insulated cable.
An indication that a partial rewire has been un-
dertaken is if there is a mix of different switch and
socket styles and if there is surface-mounted wir-
ing running up walls or along skirting boards.
What is involved in a rewire?
Rewires are messy and are best achieved in two
stages, usually before any plastering has been
done and at the same time as any plumbing or
central heating work. This is also best achieved
without any furniture or carpets in place, as ceil-
ings and walls will need to be cut into and floor-
boards lifted to allow for installation of cables and
wiring.
The real difficulty will occur if carrying out a
rewire in an inhabited dwelling where, apart from
moving furniture and lifting carpets, you must en-
sure that the first and second fix of each circuit
needs to be carried out at the same. This is to en-
sure that the power is reconnected every evening
for the occupants to have electricity, which can
add significant time and expense to any project.
Second fix is when switches, lights and front
faceplates of sockets are fitted, connected and
then tested before being made live.
Things to consider during first fix – which in-
cludes all of the wiring for:
• Circuits and back boxes.
• Internal lighting and external security lights.
• Outdoor sockets.
• Doorbells.
• Smoke detectors and heat alarms.
SPARKS
ELECTRICAL NEWS
JULY 2021
8 CABLES AND CABLE ACCESSORIES BUYERS' GUIDE
MANUFACTURERS CONTACTS CABLE GLANDS BUSBAR TRUNKING SYSTEMS
Aberdare Cables South Ocean Electric Wire Company ACDC Dynamics ARB Electrical Wholesalers
ABB South Africa Yasmin Mahomed Full range of cable glands Full range of busbar trunking systems
Brady Corporation Stone Stamcor ACTOM Electrical Products Bellco
Mark Talbot CCG and Pratley glands and shrouds Full range of busbar trunking systems
Brother International SA
Strutfast ARB Electrical Wholesalers Electech LSis
CCG Cable Terminations Tony Kinsella Full range of cable glands Full range of busbar trunking systems
Central Support Systems SW Products Bellco Legrand
Crabtree South Africa Louis Pelser Full range of cable glands Complete distribution systems for currents up to 5 000 A, whether used to
Eurolux Superlume CCG Cable Terminations connect transformers to the main LV distribution board or to supply power to
HellermannTyton Willie Garbers Range of cable glands the server racks or lighting
Indlovu Enterprises Three-D Agencies HellermannTyton O-Line
Mark Jenkins BWR, Compression Glands (SABS approved) from size 0 to 8. Nylon glands Full range of busbar trunking systems
Jointmaster
Trinity Cables available Phoenix Contact
Legrand Busbar trunking systems
Scott Meredith Jointmaster
Macrowatt Heat shrink cable joints terminations for use on LV cables; Jointmaster cast Voltex
Valsa
Marechal Electric Africa Jolene du Plesis resin joints for use on LV cables; heat shrink and cold shrink cable joints Full range of busbar trunking systems
Matelec Voltex
and terminations up to 33 kV; NKT – oil filled and XPLPE cable joints and Voltex MV/LV Solutions
Megger terminations up to 132 kV; premoulded screened right angle plug-in elbow Full range of busbar trunking systems
Hugh Ward
terminations for use up to 36 kV; premoulded unscreened elbows up to 17 kV;
O-line Waco Zap Wholesalers
Legrand Full range of busbar trunking systems
Phoenix Contact Jaco Coetzee
ISO glands and PG glands
Pratley Zap Wholesalers Magnet Electrical Supplies
Schneider Electric South Africa Fuaad Vangeria EARTH BARS
Range of cable glands
South Ocean Electric Wire Company Matelec
Stone Stamcor
CABLE FAULT LOCATION TEST Range of cable glands
ACDC Dynamics
Full range of earth bars
Strutfast EQUIPMENT O-line
Full range of cable glands
ARB Electrical Wholesalers
Superlume Full range of earth bars
SW Products ACDC Dynamics Phambili Interface
Full range of cable fault location test equipment Full range of cable glands
Bellco
Three-D Agencies Full range of earth bars
ARB Electrical Wholesalers Phoenix Contact
Valsa Full range of cable fault location test equipment Range of cable glands
HellermannTyton
Line taps and T-ferrules
Bellco Pratley
DISTRIBUTORS Full range of cable fault location test equipment Cable glands and junction boxes
Legrand
Distribution blocks
HellermannTyton SW Products
Cable Route Tracer, Cable Pipe Locator and Avoidance (CAT4PLUS), Sprague connectors
Major Tech
ACDC Dynamics Handheld Cable Fault Locator
Full range of Econo board earth bars: 4-, 6-, 8-, 10-, 12-, 15-, and 18-modules
ACTOM Electrical Products Three-D Agencies
Indlovu Enterprises BW and compression glands; Polyamide glands
MCE Electric
ARB Electrical Wholesalers MCE DIN rail earth bars; MCE fully insulated earth bars
Surge generators/thumpers; listening sets; pre-location scopes; cable Trinity Cables
Atlas identification sets; cable route tracers; ac testers; dc testers, ac/dc testers; Range of cable glands
Phoenix Contact
VLF testers Range of earth bars
Banding & Identification Solutions Africa Valsa
Bellco Major Tech Range of cable glands
Valsa
MT195 – cable meter; MT196T – cable identifier Full range of earth bars
Brady South Africa Voltex
Megger Full range of cable glands
Voltex
Cabstrut EZ Thump; DET; CI (Cable Indentifier) Full range of earth bars
Central Support Systems Waco
Voltex Full range of cable glands
Waco
Crabtree South Africa Cable fault location test equipment Full range of earth bars
Zap Wholesalers
Dave Wauchope Full range of cable glands
Zap Wholesalers
HellermannTyton DUCTING Full range of earth bars
Indlovu Enterprises CABLE JOINTS NEUTRAL BARS
Magnet Electrical Supplies ACDC Dynamics
Major Tech Full range of ducting
Aberdare Cables
ARB Electrical Wholesalers ACDC Dynamics
MCE Electric LV, MV and HV cable joints
Full range of neutral bars
Full range of ducting
Phambili Interface ACDC Dynamics
Bellco Full range of cable joints
ARB Electrical Wholesalers
Phoenix Contact Full range of ducting Range of neutral bars
Schneider Electric South Africa ACTOM Electrical Products
Cabstrut RELCO MV paper cable joint boxes; cast iron joint boxes; heatshrink jointing
Bellco
Stone Stamcor Full range of ducting and termination range; cold shrink jointing and termination range; LV resin
Range of neutral bars
Superlume Central Support Systems joints; MV jointing compounds; jointing tapes Electech LSis
Three-D Agencies Complete range of ducting Full range of neutral bars
ARB Electrical Wholesalers
Trinity Cables HellermannTyton Range of cable jointing products HellermannTyton
Solid and slotted trunking Earth rods for electric fences
Valsa Bellco
Legrand Full range of cable joints Legrand
Voltex Distribution blocks
Full range of DLP perimeter trunking Eurolux
Waco Major Tech
MCE Electric Size 1 to 50 joining kits
Zap Wholesalers MCE slotted trunking; MCE solid PVC wall and floor trunking; Canalplast Neutral bars: 4-, 6-, 8-, 10-, 12-, 15-, and 18-modules
HellermannTyton
slotted cable trunking; Canalplast SYS45 rapid power skirting Large selection of heat shrinkable joints available in various sizes MCE Electric
CONTACTS O-line Jointmaster MCE DIN rail neutral bars; MCE insulated neutral bars
Full range of ducting Range of cable joints Phoenix Contact
Aberdare Cables Phambili Interface Magnet Electrical Supplies Range of neutral bars
Annelene Naidoo Full range of ducting Range of cable joints Voltex
ABB South Africa Phoenix Contact Matelec Full range of neutral bars
Customer contact centre Full range of ducting Range of cable joints Zap Wholesalers
ACDC Dynamics Strutfast MCE Electric Full range of neutral bars
Elmari Erasmus/Dirk Klynsmith Full range of ducting MCE cable joint kits
ACTOM Electrical Products Three-D Agencies O-line LV CABLES
Mike Ullyett PVC slotted and solid trunking Full range of cable joints
ARB Electrical Wholesalers Voltex SW Products Aberdare Cables
Sales Full range of ducting Steel conduit fittings Comprehensive range
Atlas Waco Superlume ACDC Dynamics
Sales Full range of ducting IP65 cable connection glands: Straight, T connection and X connection Full range of LV cables
Banding & Identification Solutions Africa Three-D Agencies ACTOM Electrical Products
Rosa Dos Remendos CABLE SECURING PRODUCTS Range of cable joints Armoured LV 1.5 – 16 mm2 Bells cables (SWA and ECC); Armoured LV 25 –
Bellco Trinity Cables 300 mm2 Mains cables (SWA and ECC); Aerial bundled conductors (ABC)
Shiraj Wentzel and Airdac; Interdac 1.9/3.3 kV cables; GP Housewire, Surfix and Flat Twin;
Aberdare Cables Range of cable joints
Brady South Africa Bare copper earth wires, Aluminium Conductors Steel Reinforced (ACSR);
MV and HV Valsa
Morne Louw Low and halogen free cables for mining
ACDC Dynamics Range of cable joints
Brother International SA Full range of cable securing products
ARB Electrical Wholesalers
Voltex Range of LV cables
Munna Desai ACTOM Electrical Products Full range of cable joints
Cabstrut BBS cable clamps and wedges for mine shafts
Atlas
Waco Full range of LV cables
Juanita Kanagan ARB Electrical Wholesalers Full range of cable joints
CCG Cable Terminations Full range of cable securing products
Bellco
Zap Wholesalers Full range of LV cables
Arthur Cameron Bellco Full range of cable joints
Central Support Systems Full range of cable securing products
Magnet Electrical Supplies
Full range of LV cables
Faruk Cassim Cabstrut CABLE MARKING Phoenix Contact
Crabtree South Africa Full range of cable securing products
Sales Range of LV cables
HellermannTyton Aberdare Cables
Dave Wauchope Cable Ties: locally manufactured T-Series cable ties, stainless steel, Edge
South Ocean Electric Wire Company
Unique conductor marking technology Range of LV cables
Tandy Marks Clips and adhesive cradles
ABB South Africa Trinity Cables
Electech LSis Jointmaster Full range of cable marking systems
Rose Schulz Range of LV cables
Cable clamps for MV cables
ACDC Dynamics Valsa
Eurolux Legrand Full range of cable marking systems
Andrew Wex Range of LV cable
Colson cable ties
ACTOM Electrical Products Voltex
HellermannTyton Magnet Electrical Supplies Full range of cable marking systems
Ingrid Nicolaus Full range of LV cables
Range of cable securing products
ARB Electrical Wholesalers Zap Wholesalers
Indlovu Enterprises Matelec Full range of cable marking systems
Francois Goosen Full range of LV cables
Range of cable securing products
Banding & Identification Solutions Africa
Jointmaster O-line
Johan Oosthuizen Full range of cable securing products
Band-it identification systems for cable marking MV CABLES
Bellco
Legrand Phambili Interface Full range of cable marking systems
Johan Bosch Full range of cable securing products Aberdare Cables
Brady South Africa Paper Insulated Cables up to 33 kV; XLPE Insulate Cables up to 132 kV
Macrowatt Phoenix Contact Full range of cable marking systems
Raymond Lowe/Chesray Manley Range of cable securing products ACTOM Electrical Products
Brother International SA Distributors of full drums and lengths cut to size: Paper Insulated Lead
Magnet Electrical Supplies Pratley Complete range of cable marking systems
Jenine Cables (PILC); Cross-linked Polyethylene (XLPE); MV Aerial Bundled
Full range of cable securing products
HellermannTyton Conductors (ABC)
Major Tech Strutfast Full range such as Helagrip, Ovalgrip Cable Markers, Wire Identification Clip
Werner Grobbelaar Full range of cable securing products
ARB Electrical Wholesalers
(WIC) markers, heat shrink markers, labels including PV labels Full range of MV cables
Marechal Electric Africa SW Products Legrand
Joe Henriques Steel saddles
Atlas
CAB 3 and Duplix identification and marking systems for easy identification Full range of MV cables
Matelec Three-D Agencies of circuits
Mhleli Tenza Cable ties in nylon, Polyprop and stainless steel
Bellco
Magnet Electrical Supplies Full range of MV cables
MCE Electric Valsa Range of cable marking systems
Sales Range of cable securing products
Magnet Electrical Supplies
Phambili Interface Full range of MV cables
Megger Voltex Full range of cable marking systems
Alan Goodson Full range of cable securing products
Trinity Cables
Phoenix Contact Range of MV cables
O-line Waco Cable marking systems
Sales Range of cable securing products
Voltex
Three-D Agencies Full range of MV cables
Phambili Interface Zap Wholesalers Cable markers; heatshrink markers and machines
Steve Lea Full range of cable securing products
Zap Wholesalers
Voltex Full range of MV cables
Phoenix Contact Full range of cable marking systems
Carl Coetzer
Pratley
Eldon Kruger
Schneider Electric South Africa
Sales
JULY 2021 SPARKS
ELECTRICAL NEWS
CABLES AND CABLE ACCESSORIES BUYERS' GUIDE 9
LUGS, FERRULES, CONNECTORS,
CONDUIT TRAILING CABLES CABLE LADDERS, CABLE TRAYS
PRE-INSULATED TERMINALS
ABB South Africa Aberdare Cables Pratley Cabstrut
Full range of conduit Elastomeric Insulated Cables; Flexible Cables (Types H05 RN-F, H07 RN-F); Range of lugs, ferrules, connectors and pre-insulated terminals Powerack weld-free cable ladder; return flange cable tray; welded wire mesh
ACDC Dynamics Welding Cables; Mining Trailing Cable (up to 33 kV) Stone Stamcor tray
Full range of conduit ACDC Dynamics Full range of copper/aluminium bi-metallic, compression lugs and ferrules; Central Support Systems
ACTOM Electrical Products Full range of trailing cables 11 kV and 36 kV mechanical lugs and ferrules; full range of pre-insulated Range of cable ladders and cable trays
All PVC and steel conduit and fittings ACTOM Electrical Products terminals Legrand
ARB Electrical Wholesalers Rubber and PVC trailing cables Strutfast Cablofil cable trays
Range of conduit ARB Electrical Wholesalers Range of lugs, ferrules, connectors, and pre-insulated terminals Magnet Electrical Supplies
Atlas Full range of trailing cables SW Products Range of cable ladders and trays
Full range of conduit Atlas Copper lugs and ferrules O-line
Bellco Full range of trailing cables Three-D Agencies Full range of cable ladders, cable trays
Full range of conduit Bellco Copper, aluminium and bi-metal lugs and ferules; pre-insulated terminals Strutfast
Central Support Systems Full range of trailing cables Trinity Cables Full range of cable ladders, cable trays
Broad range of conduit Jointmaster Range of lugs, ferrules, connectors and pre-insulated terminals Valsa
Crabtree South Africa Range of joints and terminations Valsa Range of cable ladders and trays
Full range of conduit Magnet Electrical Supplies Range of lugs, ferrules, connectors and pre-insulated terminals Voltex
Eurolux Range of trailing cables Voltex Full range of cable ladders, cable trays
20 mm and 25 mm conduit Phoenix Contact Full range of lugs, ferrules, connectors and pre-insulated terminals Zap Wholesalers
HellermannTyton Range of trailing cables Waco Full range of cable ladders, cable trasy
Flexible conduit South Ocean Electric Wire Company Full range of lugs, ferrules, connectors and pre-insulated terminals
Magnet Electrical Supplies Range of trailing cables Zap Wholesalers CRIMP TOOLS AND CUTTERS
Range of conduit Trinity Cables Full range of lugs, ferrules, connectors and pre-insulated terminals
O-line Range of trailing cables ACDC Dynamics
Full range of conduit Voltex SPECIALISED CABLES Full range of crimp tools and cutters
Phoenix Contact Full range of trailing cables ACTOM Electrical Products
Range of conduit Zap Wholesalers Aberdare Cables Range of tools and equipment for cables
Schneider Electric South Africa Full range of trailing cables Fyrsure fire survival cables; Petrosure lead sheathed; Airfield Lighting; ARB Electrical Wholesalers
Flexible corrugated conduit SafeEarth; Pullwire; Solardac PV; Raildac (locomotive and rolling stock); VSD Range of crimp tools and cutters
South Ocean Electric Wire Company FLEXIBLE CABLES ACTOM Electrical Products Banding & Identification Solutions Africa
Range of conduit Range of specialised cables Band-It stainless steel cable tie tools/tensioners
Strutfast Aberdare Cables ARB Electrical Wholesalers Bellco
Full range of conduit A range of low voltage flexible cables including cabtyre, panel wire, Range of specialised cables Full range of crimp tools and cutters from DIY to heavy duty crimpers
SW Products submersible pump, welding, nitrile trailing, power cables Atlas including hydraulic crimpers, hand-held and hydraulic cable cutters
Steel conduit fittings ACDC Dynamics Full range of specialised cables Dave Wauchope
Three-D Agencies Full range of flexible cables Bellco Cembre Spa/Italy: Full range of crimping tools for all cable termination
Full range of conduit ACTOM Electrical Products Range of specialised cables application, both manual and Hydraulic equipment; Marvel/Japan: Cable
Welding cables, cabtyres, trailing cables, panel wires, submersible cables Legrand cutters and crimping tools
Valsa
Range of conduit ARB Electrical Wholesalers Legrand cabling system 2 (LCS3) includes copper (cat 6 A, cat 6 and cat 5e, HellermannTyton
Range of flexible cables fibre optic and Wi-Fi solutions as well as enclosures) Full range of crimp tools and cutters from DIY to heavy duty crimpers
Voltex including hydraulic crimpers. Hand-held and hydraulic cable cutters
Full range of conduit Atlas Macrowatt
Zap Wholesalers Full range of flexible cables Specialists in cable harnessing and manufacturing, across the range Indlovu Enterprises
Voltex Cable spiking guns
Full range of conduit Bellco
Range of flexible cables Full range of specialised cables Jointmaster
Specialised cable preparation tools and preparing MV XLPE cables
TELECOM, INSTRUMENTATION AND Jointmaster
Range of joints and terminations PANEL WIRING, TERMINALS AND Legrand
CONTROL CABLES Starfix
Magnet Electrical Supplies TERMINAL BLOCKS
Range of flexible cables Magnet Electrical Supplies
ACTOM Electrical Products Range of crimp tools and cutters
Full range of telecom, instrumentation, and control cables
Phoenix Contact Aberdare Cables
Range of flexible cables Panel Flex (High conductivity bunched plain flexible copper conductors
Major Tech
ARB Electrical Wholesalers Full range of high quality drop forged crimpers featuring integral ratchets
Full range of telecom, instrumentation and control cables
South Ocean Electric Wire Company 300/500 V and 600/1000 V); Power Flex (Single core flexible copper
with release mechanism for guaranteed optimum crimping with controlled
Range of flexible cables conductors, insulated with general purpose flexible grade PVC and sheathed
Atlas calibrator assembly to comply with ISO 9000 standard requirements
Trinity Cables with a flexible grade waterproof PVC/Nitrile, 600/1000 V
Full range of telecom, instrumentation and control cables
ACDC Dynamics MCE Electric
Range of flexible cables
Bellco MCE cable cutters, wire strippers and crimping pliers
Voltex Full range of panel wiring, terminals and terminal blocks
Full range of telecom, instrumentation and control cables
ACTOM Electrical Products Phambili Interface
Full range of flexible cables
HellermannTyton Range of crimp tools and cutters
Zap Wholesalers Full range of single and multi-core panel wires
Fibre enclosures and accessories; Tone and probe kit
ARB Electrical Wholesalers Phoenix Contact
Full range of flexible cables
Indlovu Enterprises Range of crimp tools and cutters
Range of panel wiring, terminals and terminal blocks
Meggers; transformer and substation instrumentation Stone Stamcor
LUGS, FERRULES, CONNECTORS, Bellco Full range of handheld, hydraulic and battery crimping and cutting tools
Legrand Range of panel wiring, terminals and terminal blocks
LCS3 Data Communication PRE-INSULATED TERMINALS Three-D Agencies
Legrand Hydraulic crimpers and cutters; manual crimpers; battery operated crimpers
Macrowatt Viking 3 junction blocks
Telephone modular line cords, curly cords, molding of RJ connectors, Cat 5 ABB South Africa Magnet Electrical Supplies Valsa
cable and assemblies. Fine wire manufacturing, single and Multicore wires. Full range of lugs, ferrules, connectors, pre-insulated terminals Range of crimp tools and cutters
Panel wiring, terminals and terminal blocks
Heavy duty curly cords in polyurethane, harnessing and cable assembly. ACDC Dynamics Voltex
Magnet Electrical Supplies Major Tech Full range of crimp tools and cutters
Full range of lugs, ferrules, connectors, pre-insulated terminals
Two-, three-, five-pole terminal connectors
Range of telecom, instrumentation and control cables ACTOM Electrical Products WACO
Major Tech MCE Electric Full range of crimp tools and cutters
Full range of lugs, ferrules
MCE DIN rail and base mount terminal blocks; MCE multi-pole distribution
Cable and LAN testers for the telecommunications industry ARB Electrical Wholesalers blocks
Voltex Full range of lugs and ferrules
O-line CABLE TRENCH COVERS
Full range of telecom, instrumentation and control cables Bellco Full range of panel wiring, terminals and terminal blocks
Full range of lugs, ferrules, connectors and pre-insulated terminals ARB Electrical Wholesalers
Phambili Interface
CABLES FOR HARSH ENVIRONMENTS Dave Wauchope Range of panel wiring, terminals and terminal blocks Full range of cable trench covers
JST/Japan – Solderless terminals and connectors; Cembre/Italy – Terminal Bellco
Phoenix Contact
ACTOM Electrical Products and Connectors Full range of cable trench covers
Panel wiring, terminals and terminal blocks
Suppliers of anti-termite cables; silicone single wires and cabtyres; H07RN-F Eurolux Pratley Central Support Systems
rubber cables Range of SABS-approved lugs, ferrules, connectors and pre-insulated Range of cable trench covers
Panel wiring, terminals and terminal blocks
ARB Electrical Wholesalers terminals
South Ocean Electric Wire Company JDL Electric
Range of cables for harsh environments HellermannTyton Panel wiring, terminals and terminal blocks Range of cable trench covers
Atlas Full range of HT, HTB, Pre-insulated terminals and Brass Terminals
Three-D Agencies O-Line
Full range of cables for harsh environments Jointmaster Connector strips Full range of cable trench covers
Bellco Mechanical shearbolt connectors (lugs and ferrules) for use on MV cables
Valsa Voltex
Full range of cables for harsh environments Legrand Range of panel wiring/terminals and terminal blocks Full range of trench covers
Magnet Electrical Supplies Starfix ferrules
Voltex
Range of cables for harsh environments Magnet Electrical Supplies Full range of panel wiring/terminals and terminal blocks
Eurolux Range of lugs, ferrules, connectors, and pre-insulated terminals
Zap Wholesalers
Hazardous area lighting Major Tech Full range of panel wiring/terminals and terminal blocks
Phoenix Contact Two-, three-, five-pole terminal connectors
Range of cables for harsh environments Marechal Electric Africa
DECONTACTORTM plug and industrial switch (up to 250 A); Multi-contact
CABLE LADDERS, CABLE TRAYS
Trinity Cables
Range of cables for harsh environments sockets (up to 37 contacts); Industrial connectors (up to 600 A); Single pole
Voltex
connectors (up to 700 A with pilots); Socket, distribution, break-out, junction, ACDC Dynamics
boxes Full range of cable ladders, cable trays
Full range of cables for harsh environments
Matelec ACTOM Electrical Products
Range of lugs, ferrules, connectors, and pre-insulated terminals All cable ducting and trays
MCE Electric ARB Electrical Wholesalers
MCE wire connectors and MCE-Morsettitalia DIN rail terminals Full range of cable ladders and cable trays
Phambili Interface Banding & Identification Solutions Africa
Range of lugs, ferrules, connectors, and pre-insulated terminals Band-It stainless steel cable ties for cable trays
Phoenix Contact Bellco
Range of lugs, ferrules, connectors and pre-insulated terminals Full range of cable ladders, cable trays
+27 (0)11 879 6600 +27 (0)11 238 0000
+27 (0)11 879 2000 +27 (0)11 392 3804
+27 (0)11 874 7600 +27 (0)11 955 2190 +27 (0)10 202 3300 +27 (0)11 794 1306
SPARKS
ELECTRICAL NEWS
JULY 2021
10
CABLES AND CABLE ACCESSORIES
WORKING KNOWLEDGE WITH TERRY MACKENZIE HOY
Doing a jippo
I
n South Africa, back in the day, if something stopped working and you minutes, stopping when the water boils. If the generator voltage drops to will trip. Wait 10 seconds and restart the drive. Repeat until the motor is
needed it in a hurry but it couldn’t be fixed in a hurry, then somebody low load and the voltage collapses, the automatic voltage regulator is not at about 60% speed. Close the motor circuit breaker and the motor will
would suggest that you “jippo it”. These days we might use the word working. Take care! Stay away from the drum ... And yes, it does work. quickly run up to full speed.
‘hack’ instead of ‘jippo’ – it is sort of the same thing.
So, here are six “hacks/jippos”: Second: Say you need to supply a load for a short time, but you have not Fifth: You need a good temporary earth but have no copper rods etc., So-
First: I have written before about load testing a generator. To repeat: If got a cable with enough capacity. Solution: run the cable through a hose lution: Use reinforcing bar. Diameter does not really matter. Space at 2 m
the generator is rated at 100 kVA or less, proceed as follows: Obtain the and fill the hose with water. You can easily double the normal current the intervals and hammer 2 m into the ground. Connect all the tops sticking
following: 210 litre steel drum with the lid removed, 80% full of tap water, cable can handle. out with fencing wire.
mounted on a wooden pallet; 150 amp three phase circuit breaker, 5 kA; In addition, if you are laying a cable in a location where there is a high
wood strip: 500 x 40 x 12 with three holes drilled in it, one at the centre Third: Emergency transformer: If your transformer is overloaded you can theft rate, don’t lay a bare copper earth wire with the cable. Use 12 mm
and the others at 200 mm from the centre; three 500 mm long metal balance a garden sprinkler on it and you will be able to run it 20% over- 19 strand stainless steel rigging wire. Make sure it is fixed at both ends.
threaded rods; and three 16 mm insulated fly leads. Bolt the threaded load (but not if it has open bushings). It does not rust and is impossible to cut.
rods into the wood so that the tops of the rods are about 20 mm above
the wood. Connect the top of each rod onto a fly lead and onto the out- Fourth: Let us say there is a large motor which, when you want to get it up Sixth: And finally… say you have a small generator and it makes a big
put of each phase of the circuit breaker. Connect the generator output to to speed, requires that you bypass all the trip circuits since it grossly over- noise when it runs. You need a silencer. Proceed as follows: Get a 210
the circuit breaker input. Immerse the rods in the water, resting the wood loads the power supply which then trips. To get it up to speed with ease, litre drum, cleaned out of any oil or inflammables. Using galvanised
strip on the sides of the drum so the rods dangle in the water. Start the buy a variable speed drive rated at about 15% of the motor rating. Con- pipes, connect one pipe to one end of the drum and the other to the
generator. Close the circuit breaker. Measure the current in the fly leads nect the output of the drive to the motor terminals via a circuit breaker. other. Bury the whole arrangement but leave the pipes sticking out the
– it should be low. Now add salt to the water, a teaspoon at a time. The Set the current limit on the drive to 110% and start the drive. The motor ground. Then connect one pipe to the exhaust outlet of the generator.
generator will gradually load up. If it reaches full load, let it run for a few will turn and accelerate slowly and then, after about 10 seconds, the drive Voila! Homemade silencer…
Easily double your cable Highly innovative electrical cable solutions
identification speed
I
f you are still using old technology, the time you have to
get your work done seems to disappear. Old processes
slow you down, rework creates bottlenecks and errors
can bring things to a full stop. Help keep things running
smoothly by automating your identification.
Brady offers a family of print-and-apply machines that
take the manual labelling process out of your hands so you
can move through your work more efficiently and with less
rework. With these modern automated machines, you can:
• Increase productivity – cut labelling time in half to keep
your output numbers high.
• Reduce errors – get sustainable, consistent identification
without the rework.
• Make changes fast – intuitive full-colour touchscreen and
user interface make changing settings easy.
W
ith over 65 years of experience, Prat-
10 seconds faster per cable ley prides itself on the production of
Wraparound and flag labels can be applied up to 10 seconds highly innovative electrical cable glands,
faster with Brady’s automated cable identification solutions. electrical junction boxes and related accessories.
The Wraptor A6200 wrap printer applicator for wrap-around Those variants for use in hazardous locations com-
labels in cellular manufacturing and process-driven assem- ply with international IECex Standards for Ex n, Ex
bly. Greater flexibility now comes in a lightweight, compact e and Ex d explosion protected equipment. Many
size. It’s a new, automated labelling device from Brady, and it’s Pratley cable glands and boxes also comply with
built to boost your efficiency. the European ATEX directive.
Pratley products can be found in many inter-
Meet the Wraptor A6200 wrap printer applica- national mines, petrochemical plants and col-
tor lieries including those of Sasol, Caltex, Natref,
The Wraptor A6500 wrap printer applicator significantly Anglo Platinum, Anglo Gold, Mosgas Offshore,
increases production output by identifying cables with wrap- Siemens, AECI, Amcoal and many more. Its
around labels in 5 seconds. With the BradyPrinter A5500 market leading electrical products serve the in-
flag printer applicator, operators can significantly increase dustrial, mining, construction, petrochemical and
production output by flagging cables in 5 seconds. consumer markets in many countries around the
globe. Pratley manufactures over 800 products,
Great reliability has filed more than 350 patents world-wide and
Dedicated labels are available for maximum reliability when is an ISO 9001:2008 accredited organisation.
using Brady’s automated identification solutions. The labels
themselves are of great quality and can resist challenging in- A world first
dustrial environments. All identification materials have been The Pratley Taper-Tech® Ex d/e Flameproof En- ing is aimed at creating a culture of quality and the correct size cable gland, cable prepara-
tested using standard ASTM test methods for optimal reli- viro Compression Cable Gland is an ultra-tough, distinction among learners, electrical artisans tion and how to fit a cable gland and rubber
ability as described in the technical datasheets. corrosion resistant encapsulated brass cable and engineers. This is achieved by educating on shroud to a length of cable.
glands for unarmoured cable. It is fully certified the importance of correct cable termination and • A brief introduction to the theory of Ex n and
Enquiries: +27 (0)11 704 3295 to SABS (MS-XPL/18.0668X) and IECex (ICS electrical product selection. Since inception, we Ex e enclosures, followed by flameproof theory.
20.0006X) standards and is suitable for use have trained more than 5000 learners, artisans • A practical session on installing a Flameproof
in Zones 1, 2, 20, 21 and 22. and engineers from South Africa and abroad. Cable Gland.
No special tools or spanners required, as well Aligned with Pratley’s famous Policy Statement, • Tour of the Pratley Research, Development
as no external clamping. The compression gland the courses equip artisans with skills needed to and Testing Laboratories.
is suitable for use in installations from -20°C to gain maximum benefit from Pratley Products. The In addition, the company offer a ‘Hazardous Lo-
95°C and underground mines. Furthermore, it is most popular workshop is a basic theoretical and cations Seminar’ presented by Eldon Kruger. He
IP 66/68 rated to an incredible 350m underwater practical cable glanding workshop focusing on the is a recognised authority on the subject and past
continuously. The gland is also resistant to corro- fitting of cable glands in non-hazardous and haz- groups have significantly benefited by his interest-
sive environments, as well as being oil and grease ardous locations. ing and informative sessions. These seminars are
resistant. usually offered to senior management and engi-
Typical workshop contents: neers wanting to further of refresh their knowledge
Cable gland training • Lectures on the design and function of a ca- on hazardous locations. The company also offer
The Pratley Training Centre was opened in 2004 ble gland. Hazardous Locations training at its Cape Town
and comprises a modern, fully equipped lecture • Lectures on hazardous locations and applica- Training Centre on request.
room and practical workshop area of more than ble equipment.
300 square meters. Pratley cable gland train- • A practical session, including how to select Enquiries: www.pratleyelectrical.com
JULY 2021 SPARKS
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