When looking at the design of a lighting scheme it is useful to have an understanding on the nature of light itself and some of the basic theory associated...

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:

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...

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...

Photovoltaic (PV) systems are typically more efficient when connected in parallel with a main power gird. During periods when the PV system generates energy...

The other day I was talking to a colleague who is a building services consultant.  Despite regularly specifying dry-type/cast resin transformers he was...

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

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

Current transformers (CTs) are used to convert high level currents to a smaller more reasonable level for use as inputs to protection relays and metering...