- Low voltage
Low voltage is an
electrical engineering term that broadly identifies safety considerations of anelectricity supply system based on thevoltage used. While different definitions exist for the exact voltage range covered by "low voltage", the most commonly used ones include "mains voltage". "Low voltage" is characterised by carrying a substantial risk of electric shock, but only a minor risk ofelectric arc s through air. "Low voltage" is distinguished from:
*Extra low voltage – which carries a much reduced risk of electric shock
*High voltage – where electrical arcing is a substantial additional risk.Commonly used definitions include:
*The
International Electrotechnical Commission defines low voltage as any voltage in the range 50–1000 V AC or 120–1500 V DC.*The United States 2005
National Electrical Code (NEC) defines low voltage as any voltage under 600 V (article 490.2).*British Standard
BS 7671 :2008 defines low voltage as
** 50–1000 V AC or 120–1500 V ripple-free DC between conductors;
** 50–600 V AC or 120–900 V ripple-free DC between conductors and Earth.ee also
*
Extra low voltage
*High voltage
*Potential difference
*Voltage converter
*Transformer
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