Home Cable Asylum

Interconnects, speaker wire, power cords. Ask the Cable Guys.

RE: 20 amp Duplex on 15 amp circuits? yes? no? don't care?

For an appliance or piece of equipment that uses a cord and NEMA 5-20P (20 amp plug), UL, NEMA, and NEC code, all limit the FLA (Full Load Amps) of the appliance or equipment to 16 amps maximum. More than 16 amps the manufacture must use a 30 amp plug.

For a NEMA 5-15P (15 amp plug) the FLA of the appliance or equipment can not exceed 12 amps. One reason portable vacuum cleaner manufactures never boast about their vacuum cleaner having a motor bigger than 12 amps. Who would buy a home consumer vacuum cleaner with a 20 amp plug?

Will a 15 amp breaker trip open with a 16 amp continuous connected load? Maybe, someday.

Edits: 03/20/17

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