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Issue No 65                                                                                                February 2013
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In this issue...
- CoCs for electric fences: who will issue them?
- Train less for better skills development
- Don't let the main contractor take advantage of you!
- Unilateral changes to terms and conditions of employment
- ECA(SA) Presidential Excellence Award
- Selecting effective lighting control.
- Power factor correction basics
- Vector Inbox
- Electric motors and how to improve their control and protection: Part 2
- The importance of flowmeter accuracy
- Integrating data from different sources
- Solar versus ambient temperature power
- Solving power management problems
- ECA news
- Industry news
- Company, product, project & service news
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mark-botha
CoCs for electric fences: who will issue them?
by Mark Botha, editor


According to the new Electrical Machinery Regulations promulgated on 25 March 2011, all new electric fences installed after that date will need additional certificates of compliance (CoCs), but who will issue these?... (more)

Peter-Enslin
Train less for better skills development
by Peter Enslin, Executive Intervention


South Africa's ongoing efforts to train its way out of the deepening skills crisis by using formal, traditional training methods "won't achieve much", says Clevva director Ryan Falkenberg... (more)  

Don't let the main contractor take advantage of you! 
by Chris Greager, ECA, with Pearce, Du Toit & Moodie
 

I have recently been shocked at the losses incurred by some major electrical contractors who have subcontracted to main contractors on government projects and who have not been paid... (more)
Unilateral changes to terms and conditions of employment 
by Shantonette Naidoo, ECA

An employer may sometimes want to change their employees' terms and conditions of employment, but goes about it in the wrong way. I sometimes appear at Council or the CCMA with disputes relating to such "one sided" or unilateral changes to terms and conditions of employment... (more)
SRE
ECA(SA) Presidential Excellence Award: Installation of the Year - Housing  
Information from ECA

The ECA(SA) Presidential Excellence Awards is a celebration of quality, outstanding workmanship and professionalism within the electrical industry. This year, the Installation of the Year - Housing award went to M&L Electrical Contractors... (more)

Selecting effective lighting control
Information from Rockwell Automation   

   

The past decade has seen many improvements in residential, commercial and industrial lighting control. This has resulted in more efficient use of electricity, daylight and more versatile, automated, and convenient controls... (more)
Power factor correction basics
Information from Osram Opto Semiconductors

Power factor (PF) is an important consideration in terms of energy efficiency for electronic devices including LED luminaires. Understanding the basics of PF and how to correct it will help address the issue in the very early stages of design.... (more)
Vector Inbox

This month's winning letter by Mike Stokes of Southern Star Electrical reveals the appalling condition of the electrical systems at separate sites in Port Elizabeth and East London which he has visited to conduct electrical CoC inspections and tests... (more)  
Electric motors and how to improve their control and protection: Part 2  
by Etienne Gaucheron, Schneider Electric 

An overview of all the available electric motors, together with their main characteristics and the areas in which they are used. Part 1 of this article focused on three-phase asynchronous motors. Part 2 explores the remaining types of motor... (more)

The importance of flowmeter accuracy 
Information from Siemens
     


Understanding the accuracy of a flowmeters is important but it can also be misleading as different specifications are used to explain accuracy. The more accurately a flowmeter can measure, the more money you will save... (more)
Integrating data from different sources
by John Salisbury, Endress+Hauser

Using open architectures with flexible structures based on internet technologies to integrate information from a wide variety of different sources... (more)

Solar versus ambient temperature power 
by Carel Ballack, SESSA       


The water in a geyser can be heated by means of an electrical resistance element, a solar collector or a heat pump. This article aims to compare these technologies... (more)
Solving power management problems 
by Jim Tessier, Eaton Corporation

Many organisations today use standalone software from multiple vendors to monitor and manage crucial power quality and environmental devices. These outdated applications, however, only add further complexity... (more)
ECA news
   
Industry news
Company, product, project & service news