Sparks Electrical News

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sparks
ELECTRICAL NEWS august 2015
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.
Editor:
Erika van Zyl
Advertising:
Carin Hannay
Production & layout:
Colin Mazibuko
Consultant:
Ian Jandrell PrEng, BSc(Eng), GDE, PhD, FSAIEE, MIEEE
Director:
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.
people on the move
24
July solution
Bright Spark
Total 6 779 per month.
Chopping the chocolate
BARRY was the happy owner of a giant chocolate
bar, which he wanted to break up into 35 small
squares. However, he couldn't decide how to do
it. He thought of breaking it into five strips and
then breaking up the strips, but then he wondered
whether he should break it instead into two large
rectangles, and break up each of those separately;
Naturally, he wanted to make as few breaks as pos-
sible. Can you say what was the smallest number of
breaks needed?
Amatch puzzle
In any knockout tournament, each match knocks
out one player.
Therefore, if there are 35 players there will have to
be 34 matches to leave one winner. This will be so
however the matches are arranged, and however
the byes are organised.
JB Switchgear
Daphne Archer,
creditors.
Kehilwe Salobodiwe,
office assistant.
Sulayman Ally,
senior estimator.
Veronica Ntshiba,
receptionist
WPI
Leon Solomon,
regional business unit
manager, Carletonville.
SEPTEMBER FEATURES
EARTHING, LIGHTNINGAND
SURGE PROTECTION
Earthing, lightning and surge protection,
earthing systems, surge protective devices,
fuses, protection of structures and
electronic equipment against lightning and
surge, internal and external lightning
protection systems, correct cabling strategies,
earth electrode testing, impedance measure-
ment and insurance.
DISTRIBUTIONBOARDS, SWITCHES,
SOCKETS ANDPROTECTION
Enclosures, earth leakage devices, circuit
breakers, fuses, surge and lightning
protection, metering switches, dimmers,
sockets, disconnectors, Certificate of Compli-
ance, testing andmeasuring instruments,
tools and accessories, cabling glands,
flameproof.