It starts with me reading one of the Horrible History books with my son (Groovy Greeks). Arrows were mentioned which lead to the discussion of the bodkin...

This is the first of two posts on the resistance of conductors. In the next post I will look at the ac resistance, including skin effect and we deal with...

Modelica is an open source (free) software language for modelling complex systems. Having never used it before, I thought I would download a development...

A frequent problem in fault calculations is the obtaining of equipment parameters.  While it is always preferable to use the actual parameters of the equipment...

Various techniques exist to enable the correct selection of batteries for UPS applications.  The procedure described below is one of the more common. ...

Collection of links to various places with useful motor information. I’ll try and return to the page every now and again to update it with any motor notes...

At the beginning of the year China put the world's first 1,000 kV UHV transmission system into operation. Transmitting power at over a million volts is...

Most installations involve some form of lightning protection system which is connected to an earth electrode.  The function of the earth electrode is to...

Our cable sizing tool is one of the more popular tools on the site.  The tool enables cables to be sized in compliance with BS 7671 (the IEE Wiring Regulations...

Problems on achieving maximum voltage drop within an installation come up often. Depending where you live, local regulations will have different limits...