Eric and Megan Swope said: Hi everyone. The breaker is supposed to pop instead of, or before the house burns down. 15 amp outlets on a 20 amp breaker is within code. In other words, the code is relying on the idea that appliances with 15 amp plugs won't use over 15 amps in the application it was intended for. Hmm not so smart I certainly see plenty of circuits wired that way pass inspection. In all cases a 15 amp GFCI outlet should be used with a 15 amp circuit and a 20 amp GFCI outlet should be used with a 20 amp circuit. A 20 amp circuit breaker must be wired with 12 gauge wire or larger. You can certainly have a 20-amp breaker protecting #10 conductors and use 15 and 20 amp receptacles on the circuit (the 15 amp receptacles are OK providing it's a multi-outlet circuit). OTR microwave - I usually run individual 20 amp circuit, though I'd bet you can get by having other loads on with it in many cases especially some lighting but those are simpler if on 15 amp circuit and 14 AWG conductors so those get avoided anyway. 404.14 allows it. When deciding how many receptacles to add to a 20-amp circuit, consider what you are likely to plug into each one. Yes, multiple 15 amp outlets on a 20 amp circuit probably wont be a problem. Back to the original question - per the NEC (210.21 is the section), you can only have 30-amp receptacles on a 30-amp circuit. I believe you can run 20 amps with the outlet as is assuming no other loads on the circuit. I'm pretty sure NEC allows 15 amp rated duplex outlets on a 20 amp circuit using 12 awg wire. A 20 amp circuit at home usually lets you run higher powered devices in multiple plugs on the same circuit. I have 15 amp rated light switches on a 20 amp circuit. National Electric Code 404.14 specifies that a switch may control a load that does not exceed the rating of the switch. For example, let’s say you have a circuit with wiring rated to handle 15 amps. A device that needs a proper 20 amp circuit cannot physically plug into a 15 amp outlet, the prongs are different. How to Determine Whether a Circuit Is 15 or 20-amp The easiest way to determine whether the circuit is a 15 or 20-amp circuit is to find the corresponding breaker or fuse in the breaker panel . Why have a pass through that accommodates 12 gauge wire if the downstream outlets will be all be reduced to 15 amp? A duplex receptacle is considered as multiple receptacles and is therefore permissible to use as the single, or one of several, multiple type receptacles on the circuit. Anyone who is saying its just fine to put 15 amp outlets on a 12 gauge wire, 20 amp circuit is just being cheap and doesn't understand why there is code. Jmo, I would use it as it is with a quality plug to match. A device sold with a 15 Amp plug is not supposed to draw more than 15 amps. 20 amp Blank GFI on 15 amp Circuit We are installing an American Standard 2425 jetted tup and running two 15 amp circuits as per instructions (pump and heater), and running both through GFIs before extending behind the tub to a split outlet. Otherwise, you may need fewer appliances using the circuit, or you may have a worn-out breaker that needs to be replaced with a breaker of the same size. A 20-amp receptacle is for heavy-duty appliances and power tools, such as air compressors. A 15 or 20 amp branch circuit is designed to accept only spades that are verticle only if duplex style. Luckily, your circuit breaker detects when there’s too much electrical flow and “trips” (breaks the circuit). 210 allows a 15 amp receptacle on a 20 amp circuit where two or more receptacles are installed on that circuit, but if you use a single receptacle on a individual 20 amp branch circuit then the receptacle must be rated 20 amps (210.21(B)(1), a single receptacle is one contact device on a single yoke, a duplex is two contact devices or two receptacles and thus allowed on a 20 amp circuit. Also, on a 20 amp circuit, I have 15 amp rated electrical outlets? You can use a device that has a 15-amp plug with either a 15- or 20-amp receptacle. This protects the circuit breaker from constantly tripping and protects your home from electrical failure. Since this is residential, there is no code or regulation to limit the quantity of outlets, either lights or receptacles, on a 15 or 20 amp circuit. And of course not plug it into a 15 amp circuit. Therefore, a 20-amp circuit should ultimately be able to hold as many outlets as you want without overloading the breaker. For example, if you have a fairly small 800-watt microwave oven, the electrician will normally install a 20-amp circuit even though a 15-amp circuit can easily handle this appliance. At worst, it's a bit misleading. The use of multiple 15 amp receptacles on a 20 amp circuit is permitted. To protect all the wiring in that circuit, a 15-amp circuit breaker is installed. Based on the information above, a 20 amp circuit breaker cannot provide a current of more that 16 amps (80% of 20 … Is this alright? But the plug itself will almost certainly survive 20 amps with no damage because the rules say you put a 20 amp fuse on a circuit with 15 amp sockets. The NEC states that a circuit cannot supply more than 80% of the circuit breakers limits. This is done so that the circuit will be able to handle future appliances that may be larger than the ones you have now. Yes a 15 amp outlet can be used on a 20 amp circuit, the outlet is limited to 15 amp, since you cannot plug in a 20 amp plug into it. So, you only count 80% of the rating which means a 13 amp breaker should not exceed 12 amp load and a 20amp breaker would be 16 amps. A 20 Amp breaker does not adequately protect a 15 Amp outlet. Some of these outlets are controlled by a 15 amp light switch as well, is that alright? 210.11(C)(1). Thanks for any help. Most household electrical receptacles have a 15-amp rating, but they connect to a 20-amp circuit. You may discover that a 15 amp device has been used on a 20 amp circuit in your home. And if more than 15 amps flows through the circuit, the breaker trips. The outlet fixture is the same but the wiring inside the outlet leading to the breaker box is heavier for a 20 amp than a 15 amp. count as a single outlet) in any application. I have a 12/3 wire split at a junction box, feeding a garbage disposal and a dishwasher, both on dedicated 20 amp circuits. A 15-amp receptacle may also be installed on a 15-amp circuit. Yet another anomaly of our precious code? Apr 29, 2005 #2. Taking that chance for an extra 2$ an outlet. This article reviews how outlets on … But just to stir up the pot, if it's ok to use a 15 amp switch, why not be allowed to use #14 from the switch to the fixture? SQLit Guest. Andy, The National Electrical Code, in article 210.21 (B) 1, 2, and 3, describes the requirements of single and multiple receptacles on a circuit.. It doesn’t matter if the end device is 15 or 20 amps rated. Refrigerator I have seldom ever put on individual circuit, in typical dwelling anyway. Adding 15 amp outlet to a dedicated 20 amp circuit. You can put 15 amp receptacles on a 20 amp circuit if there is more than one recep on that circuit. If you are looking to install a 15-amp outlet, make sure: The electrical receptacle is UL Listed; The outlet features feedthrough wiring so it can be installed to a 20-amp circuit A 15 amp outlet may be installed on a 20 amp circuit, but a 20 amp outlet may not be installed on a 15 amp circuit. Once I have installed a 15 amp GFCI on a 20 amp circuit, and used the pass-through on the back of the GFCI to connect other outlets, is the remainder of the circuit then lowered to 15 amp capacity? A 15 amp outlet allows for up to 1875 watts on a temporary basis, but only 80% of that if the device is going to be plugged in for a long time or is permanently wired in. However, a 20-amp GFCI outlet may not be installed to a 15-amp circuit. A split duplex 5-20R would be used with a 12/4 cable feeding it via a 20-amp, 2-pole GFCI circuit breaker in order to comply with Art. 15 amps outlet receptacles are rated for 20 amps feed-through. 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