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Can you use 15A plug receptacles on a 20A circuit?


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2015-07-15 18:25:14
2015-07-15 18:25:14

No. You need 20 amp receptacles. ( if a single receptacle on an individual brach circuit NEC 210.21 (B)(1) )

Yes you can use a 15 amp receptacles on a 20 amp breaker in the states but not in canada. ( branch circuit supplying two or more receptacle NEC 210.21(B)(3) )

15 amp receptacle on a 20 amp circuit is not code, partly because 20 amp circuits use #10 ga wire, which does not fit unto a 15 amp receptacle,(can be forced but lots of work.) Also a 15 amp receptacle will not take the 18 amps continuios that a 20 amp recep. will. ( It is code, see above. 14 awg = 15 amp, 12 awg = 20 amp, 10 awg = 30 amp )

20 amp wire is 12 gauge not 10

Yes you can use 15A outlets and swithes on 20 amp breakers they are UL listed for 20 amp even if they are stamped for 15A as long as the wire is 12ga to. ( NEC Table 210.21 (B)(3) )

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It depends on if you have a single outlet (receptacle) on a branch or multiple receptacles on a branch.One receptacle on a 20A branch: The receptacle must be rated 20ATwo or more receptacles on a 20A branch: The receptacles can be 15A or 20ATechnical Reference: 2011 NEC210.21(B)(1)A single receptacle installed on an individual branch circuit shall have an ampere rating not less that that of the branch circuit.210.21(B)(3) Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall conform to the values listed in Table 210.21(B)(3), or, where rated higher than 50 amperes, the receptacle rating shall not be less than the branch circuit rating.Table 210.21(B)(3)20A Circuit Rating 15A or 20A Receptacle Rating

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lighting is usually on 15A breakers receptacles on 20A the probability is high that they are not on the same circuit. if they are the same circuit the probability is high that there hasn't been an electrical inspection

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You can replace a 15A outlet with a 20A outlet. However you need a circuit protected by a 20A breaker or fuse and 12 AWG wire to run 20A through the circuit.

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The National Electrical Code (US) allows up to thirteen 20 amp receptacles on a 20 amp circuit. 120V x 20A = 2400 VA each duplex receptacle is calculated at 180 VA 2400 / 180 = 13.3333 receptacles, since you can't put a third of a receptacle in, you have to round down to 13.


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