Cut cash transactions to curb copper theft

by Mark Botha, editor 
 

by Chris Yelland, EE Publishers

At the ECA(SA) annual general meeting on 14 November 2013, former ECA president Dirk Engelbrecht stood down and Michael Straton of Port Elizabeth-based Straton Electrical was elected ECA president. Johnny Cunniff of Elkoin Electrical in Pretoria succeeded Straton as first vice-president... (more) 

The 2013 Presidential Excellence Awards of the Electrical Contractors Association of South Africa were conferred during a formal banquet to showcase the quality of work done by the association's member companies over the past year... (more) 

A contractor was awarded a tender by a municipality to construct low cost housing. The scope of the project was of such a nature that the contractor had to use additional subcontractors. However, the contractor only received partial payment ... (more) 

The rooftop solar photovoltaic (PV) industry should not be allowed to earn a negative reputation through poor installations; the answer lies with providing the correct solutions while never compromising quality... (more) 

  

A survey of banks and specialised small and medium enterprise (SME) lenders has shown that financial statements prepared by chartered accountants are seen as more trustworthy when assessing credit applications... (more)

LEDs will play a crucial role in vehicle safety in future. They already create street lighting similar to daylight. In automotive lighting they will not only improve road safety, but will enable vehicles to "think" in dangerous situations... (more)

  

Moisture ingress in sport stadium floodlights compromises light output significantly by raising the internal temperature to almost 125°C, but a South African luminaire manufacturer has found a solution to the problem... (more) 

The effect of tilting spot light designs over angles of 50° and 90° respectively, and a comparison of the thermal results from the Moduled 9980 and the LPF11180-ZHE LED coolers made with extrusion pin fin technology... (more)

The steady increase in the electricity price has created an interest by the agricultural industry in variable speed drives (VSDs). These should be considered as energy saving devices where electrical motors are used in the agricultural industry... (more) 

Many techniques are proposed in literature to make concrete mixing more efficient through control applications. This article discusses an energy-efficient concrete mixer drive using a synchronous permanent magnet motor to develop helical rotor movement ... (more)

Rotational speed monitoring takes place in many processes to monitor direction, speed and co-ordination. Commonly implemented in packaging, conveying and mixing applications, among others, rotational speed monitoring is also used as a safety and personnel protection mechanism... (more)

Discussions and author's replies to a paper on ash handling plant and their design and applications, presented at the 1957 Symposium on Pumping... (more)

With a number of tower blocks in downtown Johannesburg, ABSA has made use of rooftop space to construct SA's largest groundmount-style, rooftop-based PV system eight storeys above street level... (more)