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...

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...

Over the past year or so I've been involved in on going discussions related to referring fault levels from the secondary of a transformer to the primary...

Induction motors are frequently used in both industrial and domestic applications.  Within the induction motor, an electrical current in the rotor is induced...

MIT OpenCourseWare, makes the materials used in teaching all MIT subjects available on the Web, free of charge, to any user in the world.

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

This article gives an introduction to IEEE 485 method for the selection and calculation of battery capacity.

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...

We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.

These lifts were first built in 1884 by J. E. Hall and called a paternoster ("Our Father", the first two words of the Lord's Prayer in Latin) due to its...