For 15 amps:
Lets suppose that all your lights are 60W:
120Volts * 15Amps = 1800 Watts;
so from there a regular 15 amps circuits has 1800W to spare therefore:
1800/60 = 30 lights at 60 W each, or 1800/100= 18 lights at 100 Watts.
The current NEC allows a maximum of 12 devices on each 15 amp circuit.
So that is 12 receptacles, and/or lights.
As a practice, we usually arrange circuits into two types: Receptacle circuits, and lighting circuits. But that isn't a requirement, just our local convention.
Also, in the kitchens, we typically run only 20 amp circuits (with 12 gauge wire, not 14-gauge!)
And to be safe, we have separate circuits for:
- half of the receptacles (with a GFI device in the first location)
- ditto for the other half of the receptacles
To make it safe, just use 80% of the total wattage you can take from amperage * voltage
so if you have....
A power of 120 V
120 volts * 15 amp = 1800 watts
80% of 1800 watts = 1440 watts
a power of 240 V
240 volts * 15 amp = 3600 watts
80% of 2400 watts = 2880 watts
Depends on the wattage and how many will be on at one time, it would take a lot of lights to trip a
15 amp breaker.
You only can have as many of 1480 watts because if you put mor them that you brake is gana popp out