Low voltage

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IEC voltage rangeACDCdefining risk
High voltage (supply system)> 1000 Vrms> 1500 Velectrical arcing
Low voltage (supply system)50–1000 Vrms120–1500 Velectrical shock
Extra-low voltage (supply system)< 50 Vrms< 120 Vlow risk

Low voltage, when used as an electrical engineering term concerning an electricity supply grid or industrial use, broadly identifies safety considerations of the system based on the voltage used. The meaning of the term "low voltage" is somewhat different when used with regard to a more typical end user's distribution system, which see below.

Contents

Electricity supply system

With regard to an electricity supply system, 'low voltage' most commonly refers to mains voltage. "Low voltage" in this context is characterized by carrying a substantial risk of electric shock, but only a minor risk of electric arcs through air. Also in this context, "Low voltage" is distinguished from:

Other definitions

Some other commonly used definitions include:

See also

References