 by Mark Botha, editor
Electrical contractors in South Africa are becoming reluctant to issue Certificates of Compliance (CoCs) because of ignorance of the continual amendments to the electrical regulations and legislation... (more)
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by Mark Botha, Editor
Vector's Mark Botha speaks to Approved Electrical Inspection Authority (AIA) Nico van den Berg (pictured right) about copper theft; the need for a scrap metal dealers act; electric fence installation and a forum where contractors can share their knowledge... ( more)
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by Stephen Khola, ECA(SA)
The electrical industry's Main Collective Agreement was published on 14 March 2013 and became effective on 24 March this year. This agreement is valid until 31 January 2017... (more)
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How to become a registered person
by Cecil Lancaster, ECA(SA)
An outline of the registration criteria to be registered by the chief inspector as an electrical tester for single phase, installation electrician and master installation electrician as prescribed in the Electrical Installation Regulation, 2009... ( more) |
| Farewell to the incandescent lamp
by Henk Rotman, Philips
A lot has been written about the invention of the incandescent lamp. This article discusses the place of the incandescent lamp in the lighting industry over the years and explains in some detail three alternatives to this technology... ( more) |
The challenges of dimming LED loads with magnetic transformers
by Ethan Biery, Lutron Electronics
Anyone who has used LED loads with low-voltage magnetic or electronic transformers in dimming applications has likely experienced confusion, frustration or disappointment. The real issue here is compatibility among all three components... (more)
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Selection of AC induction motors for cement plant applications
The selection of AC induction motors for cement mill applications, with reference to fan, kiln and vertical mill applications. Cement plant applications present an immense matrix of application criteria to specify, design and build motors properly... (more)
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Circuit breaker design for safety in underground mining applications
by David Durocher and Len Walls, Eaton and Stephan Becker, Becker
In mining, the underground assembly or power centre is engineered to transform and distribute electrical power brought underground. This assembly typically includes a medium-voltage incoming circuit breaker or switch with current-limiting fuse... ( more) |
| Water treatment, boilers, cooling and effluent
by Pierre Marais, 1974
Effluent treatment is based on the ingenuity of chemists and engineers. The chemist may devise a short-cut method for the precipitation of the components but the electrical engineer designs the controls while the mechanical engineer designs filters, conveyers, agitators and others... (more)
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Designing an augmented reality platform in an enabled environment
by Nico Steyn, Tshwane University of Technology
Developing an augmented reality platform for use as a differential drive mobility aid in an enabled environment should help conduct simulations with various wheelchair constructs and to produce pitch and roll actuated actions... (more)
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| Principles and testing methods of earth ground resistance
Information from Comtest
Corrosive soils with high moisture and salt content and high temperatures can degrade ground rods and their connections. Poor grounding contributes to downtime but a lack of good grounding is also dangerous and increases the risk of equipment failure... ( more) |
Vector Inbox, August 2014 Letters from our readers
This month, our readers commend SAFEHouse's call to arms against non-compliant products in the industry and make some very valid points on combating this threat. Our winning letter: Counterfeits threaten thousands of households... (more)
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How recommissioning saves energy in buildings
by Brandi McManus and Brandy Moore, Schneider Electric
In today's business environment, buildings change on an ongoing basis: employees are added or moved; new departments are formed and old ones dissolved. Over time, entire sections or floors may be converted from storage to office space or from office space to assembly space... (more)
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