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SPARKS
ELECTRICAL NEWS JULY 2016
24 PEOPLE ON THE MOVE
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Vusumuzi Sibiya,
sales
consultant.
John Callaghan
operations
director.
Michiel Coetzee
commercial
director.
ANTLEY LIGHTING WEBBERS ELECTRICAL
Editor:
Erika van Zyl
Advertising:
Carin Hannay
Design:
Anoonashe Shumba,
B.Tech Hons Creative Art & Design (CUT) Zim
Consultant:
Ian Jandrell PrEng,
BSc(Eng), GDE, PhD, FSAIEE, MIEEE
Publisher:
Karen Grant
Deputy Publisher:
Wilhelm du Plessis
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.
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.
Total 6 779 per month.
BRIGHT SPARK
WEIGHTING IN VAIN
Mr Bloggs cut logs for a
living. Although he weighed
100 kg himself, he could
lift a weight of 150 kg with
his bare hands. However, he
wasn't satisfied with his own
strength, so he installed a
pulley to help him
He tried it out by attaching
a log to the hook and pulling,
as the picture shows. What
was the heaviest log he
could lift in this way?
How much could he lift
if he stood out in the yard?
JUNE SOLUTION
A QUESTION OF BALANCE
The total weight of all the sacks is 123 kg, so they would
be balanced best if there were 61 kg in one pannier and
62 kg in the other. This is possible by putting 35 + 16
+ 11 = 62 in one, and 24 + 17 + 13 + 7 = 61 in the other.
AUGUST FEATURES
• Motor control centres and motor protection
• Energy Efficiency
• Lighting
Buyers’ guide
• Lighting (lamps and controlgear)
Deadlines
• Advertising booking: 24 June 2016
• Editorial: 27 June 2016
• Advertising material: 4 July 2016