This post is quick introduction and overview to different railway electrification voltages used in answer to a question sent in via email. While there...

When sizing cables, the heat generated  by losses within any sheath or armour need to be evaluated. When significant, it becomes a factor to be considered...

In the previous note we looked at the approach taken by the standard to the sizing of cables and illustrated this with an example.  We then looked at one...

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

Some colleagues had an issue earlier in the week on sizing conduits to be cast in concrete for some power cables . It became clear that none of us had...

We've been sending out Newsletters on a regular basis for a few weeks now. To do this we have been using Google's Feedburner service. While Feedburner...

Anyone specifying or using electric motors should have a basic understanding how the insulation is related to temperature. Three classes of insulation...

It wasn't so long ago I was telling someone that I don't use rules of thumb as most things are easily calculated anyhow.   As it turns out I last week...

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

A recurring theme on our forums is cable sizing. Now many installations are unique and require special consideration. However, a lot of the time things...