Sparks Electrical News February 2015

20 / 20

sparks
ELECTRICAL NEWS february 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
January solution
A ring of coins
Jane had laid out six coins, all R1 pieces, in
two touching rows, like this.
"All you have to do," she said to Peter, "is to
move the coins so that they form a perfect
circle of six coins. "But", she added, "you have
tomove one coin at a time and it must move
to a position where it is exactly touching two
of the other coins – so you can't fiddle the
position of the coins." Peter managed to solve
the puzzle. Howmany moves did it require?
Two coins
Martin was wrong. The rolling coinmakes
two complete turns. It has already made one
complete turn when it is half way round, and
makes another turn in the second half of the
roll.
MARCH FEATURES
MV/LV systems, transformers, mini-
subs, suspension devices, poles, switch-
gear, control gear, quality of supply
protection, load control, cables and
cable accessories, cable and jointing
techniques, metering, energy man-
agement, energy efficiency, timers,
load shedding, load balancing, testing
equipment, hazardous areas, flame-
proof equipment.
Power tools, hand tools, tool storage,
scaffolding, test and measuring instru-
ments/tools and accessories (DMMs, im-
pedance testers, etc.) measuring supply
quality, tool calibration, bakkies, trailers,
protective clothing standards
ENERGYMEASUREMENT
&SUPPLY
Aberdare Cables
MishackMatla,
sales, marketing and
distribution director.
Voltex Lighting
Karen Senekal,
commercial projects
manager.
WPI Power Solutions
George Canha,
projects
manager.
Martin Lewis,
tendering
manager.
TOOLSOFTHETRADE