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Issue 95 October 2015

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When do contracts awarded unlawfully qualify for review?
by Michael Jones, Hayes Incorporated

The Constitutional Court sheds light on when exceptional circumstances justify a substitution order where tenders are awarded unlawfully. As contractors experienced in bidding for... (more)

Are entrepreneurs born or made?

by Prof. Naren Gupta, Edinburgh Napier University

Some say entrepreneurs are born while others think they are made. Whatever the case, entrepreneurs have many common attributes. They are dissatisfied people with a great inner awareness... (more)

The impact of surface-mounted lighting on home thermal efficiency
Information from Brightgreen

This article provides a study of the thermal efficiency benefits associated with surface-mounted LEDs compared to recessed LEDs in residential applications. The study focuses on energy loss from air leakage as a result of recessed downlight ceiling cutouts... (more)

Current distribution in parallel LED strings

by Muhinthan Murugesu, Osram Opto Semiconductors

The issues and solutions you may encounter when driving multiple LED strings from a constant current source. Many LED applications require more than one LED in a system and, when multiple LEDs are used, the LEDs can be arranged in series, parallel, or series-parallel... (more)

Not all LV switchgear is created equal

by Tom Hawkins, Siemens

An electrical fault can compromise the reliability and safety of a power distribution system but this can be prevented by integrating the correct low-voltage switchgear. Reliability and safety are the two most important criteria in the proper functioning of a power distribution system... (more)

Line reactors and AC drives

Information from Rockwell Automation

This article provides installers of drives with some guidelines on where and when reactors are needed, and on what size reactor to use. A reactor is essentially an inductor. Physically, it is simply a coil of wire that allows a magnetic field to form around the coil when current flows... (more)

The advantages of water pressure management
Information from Grundfoss

An effective way to reduce non-revenue water, improve energy efficiency and to lower operation and maintenance costs. Pressure management has proven to be an effective tool for reducing the leakage part of non-revenue water (NRW)... (more)

What is mechatronics?

by Horst Weinert, Festo Didactic

Mechatronics is a much-needed skill in the transition from a resource-based economy to a knowledge economy in South Africa. Horst Weinert of Festo Didactic offers his viewpoint on this growing field, and discusses where it is heading... (more)

What is synapse risk engineering?

by Simon van Wyk, Aurecon

Guiding questions that could be considered when engaging clients to ensure a common alignment at the onset of a new project or service offering. The risk management profession relies on international best practice standards of which clients have varying levels of understanding... (more)

Infrared thermography inspection on plant electrical systems

Information from Keysight Technologies

Plant predictive maintenance has been gaining popularity due to its benefits and advantages. When industrial or general manufacturing facilities use predictive maintenance, many voluntarily include infrared imaging as part of their electrical inspections... (more)

ECA(SA) news

The labour court's interpretation of the deeming provision

CoC course presented at Highveld Region

ECA(SA) at a glance

Best Practice Contractor Registration Scheme launched

Presidential Golf Day 2015

Highveld Region Charity Golf Day 2015

Toets 'n bakkie: Opel Mokka

Industry news

Health and safety law update: August 2015

SAEE energy awards 2015

Academy for surge, lightning protection launched