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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)

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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.

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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.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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.

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.

In Canada the CEC states 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. In the United States, in commercial and industrial installations, you are limited to 10 receptacle outlets on a 15 amp circuit and 13 receptacle outlets on a 20 amp circuit. This is computed by rating each outlet at 180 watts and dividing that into the maximum rated wattage of the circuit. On lighting circuits you are limited to 80% of the rating of the circuit without any other limitation on how many lights can be connected. In dwellings in the United States there is no limitation on how many outlets (which is the box, not the device) that can be placed on an individual circuit. This is because it is presumed that, assuming the system is professionally installed, it is highly unlikely to overload an individual receptacle circuit in a home. It does happen, but the breaker protects the circuit. You run into this problem most often in older homes where having a toaster, coffee maker, microwave, refrigerator, ceiling light, etc etc was never imagined. Newer homes are wired to reduce the likelihood of this problem.

eight In Canada 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.

Depends on if it is a 15 amp or 20 amp circuit. You can install no more than 12 outlets on a 20 amp circuit or 9 outlets on a 15 amp circuit. You can install no more than 1920 watts on a 20 amp lighting circuit or 1440 watts on a 15 amp lighting circuit. If it is a 20 amp circuit I would not install any more than 8 outlets and 4 lights. If it is a 15 amp circuit I would not install any more than 6 outlets and 3 lights. This only applies to living spaces like bedrooms, living rooms dining rooms, and not to kitchens, baths, utility rooms, garages, etc.

Assuming this is not an office of a place where lots of the outlets will be used to power items that draw lots of current on a 15 amp circuit wired with 14/2 wire I would limit it to no more than 10 outlets and lights combined. On a 20 amp circuit wired with 12/2 wire I would limit it to a 14 outlets and lights combined. There is no limit in the code. You just use common sense based on what is going to be used on this circuit.

Circuit loading In Canada the code rule is, 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.

In Canada there shall be not more that 12 outlets on any 2 wire branch circuit. These outlets include switch boxes and fixture boxes along with receptacle boxes. 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.

The electrical code does not have a requirement for the total number of outlets that can be installed on a GFCI circuit. It is the total wattage that will be used on that circuit that determines the number of outlets you can install. A 20 amp circuit at 120 volts equals 2,400 watts. The total safe load is 60% of that 2,400 watts or 1,440 watts. As long as you do not exceed that limit you can install pretty much as many as you want. I personally try to never exceed 15 maximum on a circuit if I know for sure they will never be overloaded.

It would be quite unusual to have a single 60 amp circuit with outlets and lights. You would have to use very heavy wire to each light and outlet. Typical lighting circuits would be protected by 15 amp breaker and a circuit with general purpose receptacles would have a 20 amp breaker. A typical lighting circuit might have 10 to 12 fixtures and receptacle circuit might have 8 outlets. If you don't know how to size a circuit get an electrician.

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