Sparks Electrical News March 2015

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sparks
ELECTRICAL NEWS march 2015
people on the move
20
This publication is distributed to electrical contractors,
wholesalers, distributors, OEMs, panel builders, Eskom,
mining electricians and consulting engineers (electrical)
as well as libraries, members of IESSA and public utilities.
Sold 51, free 6 754, total 6 805 per month.
Editor:
Erika van Zyl
Consultant:
Ian Jandrell PrEng, BSc(Eng), GDE, PhD, FSAIEE, MIEEE
Production & layout:
Colin Mazibuko
Advertising:
Carin Hannay
Managing member:
Jenny Warwick
Publisher:
Karen Grant
Published monthly by:
Crown Publications cc
P O Box 140
Bedfordview, 2008
Tel: (011) 622-4770
Fax: (011) 615-6108
e-mail:
Website:
Printed by:
Tandym Print
The views expressed in this publication are not
necessarily those of the editor or the publisher.
Bright Sparks
February solution
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1 2 3
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A tower of coins
Mary hadmarked three circles on a piece of
paper and placed in one of them a R5 coin, a
R2 coin, a R1 coin and 10c piece , in that order
from top to bottom. "You see," she said, "that
each coin rests on a larger coin. The puzzle is
tomove all the coins fromwhere they are now
to the end circle, by moving one coin at a time
and never placing a coin on a smaller coin.
"That is easy", said Peter."What is the trick?"
"There isn't one," Mary replied. " All you have
to do is to take as fewmoves as possible."
How can this be done?
A ring of coins
APRIL FEATURES
Regular topics such as cables, cable ac-
cessories, cable management systems,
cable sizing, skirting, trunking, conduit,
cable trays, cable marking and label-
ling, cable jointing techniques, wire
sizing, fault finding, hazardous areas,
flameproof, cable terminations, glands,
cable installations and trenching will be
included.
Panel building, gauges, displays, main-
tenance, protection, protection relays,
starters, drives, motor types, sizing,
starting, stopping, refurbishment, con-
trolling, enclosures, switches, push-
buttons, LEDs, digital displays, relays,
timers, temperature controls, process,
building management, insulation test-
ing, vibration monitoring, mainte-
nance, flameproof equipment.
CABLES ANDCABLE ACCESSORIES
MOTOR CONTROL CENTRES AND
MOTOR PROTECTION
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RichardYoung,
senior technical sales representa-
tive, Johannesburg branch.
BEKA Schréder
Grant Kemp,
sales engineer,
Cape Town branch.
Lambert Fouché,
sales representative,
Industrial branch.
Shavahn Fareed,
sales and business developer,
Legrand KwaZulu-Natal.
Legrand