Power factor is the ratio between the real power (P in kW) and apparent power (S in kVA) drawn by an electrical load. The reactive power (Q in kVAr)...

When sizing cables nearly, everyone uses some form of software. This ranges from homespun spreadsheets to complex network analyses software. Each has its...

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

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...

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...

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

One of the requirements to ensuring that everything works is to have equipment selected, manufactured and verified [tested] to IEC standards. Not all equipment...

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

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

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...