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...

Gauss's Electrical law defines the relation between charge ("Positive" & "Negative") and electric field.  The law was initially formulated by Carl Friedrich...

Years ago I was told that you should always try to write the best report you can.  Many years later I still think on this as one of the better pieces of...

Traditionally substations have used circuit breakers, current transformers (CT), voltage transformers (VT) and protection relays all wired together using...

The International System of Units (abbreviated SI) is the world's most widely used system of units.  The system consists of a set of units and prefixes...

Variable frequency drives are widely used to control the speed of ac motors.  This note looks at the mechanisms which enable drive units to control the...

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

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This is the second post in a series of two on periodic electrical inspections. In the first post, I discussed how often inspections should be carried out...

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...