A 15 amp breaker can supply 1800 watts total for lights, outlets, etc. (15 X 120 volts= 1800 watts). As a rule of thumb leave 20% spare in the event you connect a power hungry item - 1440 watts total.Add up the total wattage of items you plan to plug in to the circuit.here is no strict limit on how many receptacles can be connected to a 15 amp breaker in a residential property according to the NEC. The device is a convenience outlet and they are placed for convenient access to power without creating hazards [crossing doorways, etc].
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