Contributors
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On the tools: Field effect transistors
Field effect transistors are constructed similarly to transistors and diodes, but they have specific characteristics that pose unique challenges to electricians. David Herres explains. -
How to repair elevators
Every new multi-storey building has an elevator, which is a potential gold mine for electricians. David Herres explains the ups and downs of elevator maintenance and ... -
The benefits of natural gas-powered air conditioners
Most larger air-conditioning systems for domestic purposes are reversible in operation, thus providing heating and cooling. Most are electrically powered, and it is to a large ... -
Electrical bonding systems in portable generators
An electrical bonding system is crucial in a portable generator, and an RCD trip will warn of faults at the appliance end. Gary Busbridge explains. -
Safeguarding electrical installations from lightning strikes
Safeguarding electrical circuits and systems from lightning is crucial. In part one of this topic, George Georgevits analyses nature’s power. -
What is the smart grid?
When it becomes fully implemented, the smart grid will resemble an energy Internet, perhaps eventually worldwide. -
The tender process, part 1
In part one of this three-part series, Brian Seymour looks at the bare essentials of the tendering system. -
The A-Z of transistors
Transistors may be small but they are an important part on an electrical circuit. David Herres explains. -
The lucrative business of refrigeration systems
Attending to the electrical components of refrigeration systems is good for contractors, but there are other aspects that can be quite lucrative. Phil Kreveld explains. -
Back to basics… revisiting Ohm’s Law
Electricians need to keep up-to-date with Ohm’s Law and several other mathematical theories in order to complete their day-to-day tasks. David Herres offers this refresher course.
