Capacitors have numerous applications in electrical and electronic applications.  This note examines the use of capacitors to store electrical energy....

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...

The calculation of current in a three phase system has been brought up on our site feedback and is a discussion I seem to get involved in every now and...

IEC 60947 is the circuit breaker standard and covers the marking of breakers in detail. Any manufacturer following this standard should comply with the...

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...

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

Electrical notes are a collaborative collection of electrical engineering information and educational material. Any registered user can add content. ...

The following tables provide quick order of magnitude fault levels for a a range of typical low voltage situations.

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...

A UPS is an uninterruptible power supply.  It is a device which maintains a continuous supply of electrical power, even in the event of failure of the...