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

Often document control is dictated by project requirements, for example a particular organisation may have an existing numbering system. Existing company...

Many questions sent in to the site are in connection with motor starting and in particular star-delta.  For all but the simplest application, there is...

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

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

GE have put together a time-lapse video shown flight take-off and landings at some airports. An interesting view:

Here’s list of some famous scientists. Deliberately short, with the aim to provide a quick memory jog or overview. If your looking for more detailed information...

Estimating maximum demand is a topic frequently discussed. Working out how much power to allow for a building can be very subjective . Allowing too much...

Control theory looks at how systems work and are controlled from a mathematical view.  This note gives a brief introduction to some of the concepts – more...

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...