Circuit breakers are switching devices whose primary function is to isolate parts of an electrical distribution system in the even of abnormal conditions...

When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...

If you want to check a circuit is dead (not live), you should always use the three point method. First check a known live circuit, then check the dead...

Visitors who like to type web address rather then click menus may be interested in how our URL structure works.

HTML supports a variety of entity symbols which can be entered using either numbers or an entity name.  The number or name is preceded by the ‘&’ sign...

IEC 62305 'Protection against lightning' requires a risk assessment be carried out to determine the characteristics of any lightning protection system...

The (relatively new) switchgear and control gear standard, IEC 61439 'Low-voltage switchgear and controlgear assemblies' has three methods which can be...

I have been thinking recently that there appears to be less professional integrity around than when I first started my career in electrical engineering...

Alternating current (a.c.) is the backbone of modern electrical power distribution. In this article I’ll be pulling some of the more important concepts...

In a previous article I looked at the dc resistance of conductors and in this article we turn our attention to ac resistance. If you have not read the...