How often installations are inspected is up to the owner of the installation, provided such durations do not exceed any regulatory maximums in force. ...

If two dissimilar metals are touching and an external conducting path exists, corrosion of one the metals can take place.  Moisture or other materials...

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)...

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

A single phase system is perhaps the most common type of system most people are familiar with. This is what people have in their homes and what appliances...

When current flows within a wire, a magnetic field is created. The potion of this magnetic field perpendicular to the wire is called the magnetic flux...

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

Cable insulation is used to provide electrical separation between conductors of  a cable.  During the historical development of cables, numerous types...

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At the beginning of the year China put the world's first 1,000 kV UHV transmission system into operation. Transmitting power at over a million volts is...