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for USA, Canada and countries running a 60 Hz power supply service.Circuit loading

In North America there shall be not more that 12 outlets on any 2 wire branch circuit. Such outlets shall be considered to be rated at not more that 1 amp per outlet. Where the connected load is known, the number of outlets may exceed 12 providing the load current does not exceed 80 % of the rating of the over current device protecting the circuit. ( This is not found in the National Electrical Code)


Generally each duplex outlet may count for 180VA. For a 15A circuit = 8 duplex max. For a 20A circuit = 10 max. This is in the Wiring Code, by the way. (This only applies to non-residential applications)

In some states the 3 amp per outlet is still being used. For this case, 6 outlets max. ( What States?)

In dwelling units there is no requirement for a maximum number of outlets on a circuit. The circuit could serve a single room of 500 sq. ft. and serve as many outlets you wanted including the lighting loads. (3 watts per sq. ft X 500 sq. ft.) This is the minimum requirement of the code and not necessarily good wiring practice.


As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.




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โˆ™ 2015-07-15 19:08:44
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Q: How many duplex outlets can be placed on one circuit?
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Related questions

How many standard lighting outlets on a 20 ampere circuit?

16 outlets or 80% of the total Amperage of the circuit.

How many outlets can you have on a 230V circuit?

Depends on what the outlets are controlling, size of the wire, and size of the breaker.

How many sockets can be connected into an electric circuit?

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How many outlets can be wired to a 20A circuit?

No more than 13.

How many elec outlets can a GFCI detect?

7 on a 15 amp circuit and 9 on a 20 amp circuit.

How many 15 amp outlets on 120 volt circuit?

Depends on the size wire used in the circuit. If you wired the circuit with AWG #12 wire on a 20 amp breaker then you can install no more than 12 outlets. If you wired it with AWG #14 wire on a 15 amp breaker then install no more than 9 outlets. This is assuming only outlets are on the circuit and nothing else.

Can you control 10 outlets with one 20 amp GFCI outlet on one 20 amp circuit?

Yes. I know of no limits to how many regular receptacles (outlets) you can "piggy back" onto one GFCI receptacle. However, in commercial and industrial construction there are limits to how many receptacles can be placed on any one circuit. These limits in the United States and according to the NEC are: 10 receptacles on a 15 amp circuit and 13 receptacles on a 20 amp circuit.

How many neutral wires are needed for lighting and outlets?

If they are on the same circuit you only need 1 neutral wire in the circuit.

How many outlets on 15 amp circuit?

Install not more that 10 on a 15 amp circuit. You can install 12 if you install a 20 amp circuit.

What would cause three outlets to be low voltage and all the others in the room to be fine?

its an overload on the circuit breaker the 3 outlets are on.. many times groups of outlets are on different circuit breakers.. even though they are in the same room... especially if some are on a gfi outlet

How many outlets are there?

Up to 12 on a 20 amp circuit. Up to 9 on a 15 amp circuit. But use common sense. If the circuit will be heavily loaded, as in a home office, then do not install that many.

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