2nd October 2019


What does SWD stand for on a circuit breaker?

SWD – 15- or 20-A circuit breakers rated 347 V or less may be marked “SWD,” meaning that they are suitable for switching fluorescent lighting loads on a regular basis (NEC 240.83(D)).

Just so, what does the abbreviation SWD mean?

SWDSerial Wire Debug
SWDShift Work Disorder (circadian rhythm disorder)
SWDSolid Waste Disposal
SWDShort Wave Diathermy

Can you use a circuit breaker as an on off switch?

Circuit breakers are not designed as replacements for relays, operating controls. When a circuit breaker is designed to also be routinely used as an on-off switch to control 277 volt florescent luminaires they are marked SWD, for switch duty.

Is a circuit breaker a switch?

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit.
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