Can someone remind me which NEC rule won't allow 20A CB to protect branch circuit with NEMA 5-15R outlets? Thanks
Receptacle. A receptacle is a contact device installed at the outlet for the connection of an attachment plug. A single receptacle is a single contact device with no other contact device on the same yoke. A multiple receptacle is two or more contact devices on the same yoke.
This has been misinterpreted by many inspectors, by not knowing this definition.
Thats what it says but why is now the question.
dick
Can someone remind me which NEC rule won't allow 20A CB to protect branch circuit with NEMA 5-15R outlets? Thanks
Question is,,,,,,,why does the fact that when you have more than one receptacle, as listed in Table 210.21(B)(3) with a receptacle rating of 15 or 20 amps,is it permissable to hang them on a 20 amp breaker but 210.21(B)(1) says a single 15 amp receptacle cannot be hung on a 20 amp breaker?
dick
I was taught this----- lets say you have 2 appliances, each is plugged into 1/2 of a DUPLEX recep, and each is drawing 9 amps..... if you have a 20 A breaker on 20 A wire the 18 A load will hold.....
It would if it were true. 15a receptacles will carry 20a all day long. The rating is based on slot shape, not metal parts capacities.did that make any sense?
If . . . that appliance goes bad and uses more than the 9 A it was supposed to use. . .
It's not about receptacles or appliances faulting or drawing more than they are rated to draw. It's about putting more than 15 amps through a receptacle not rated to handle more than 15 amps, and not having a breaker capable of protecting the circuit.. . . but conversely if you only had one 9amp appliance plugged into this duplex and it faulted. . .