14 gauge will handle it with a 15 amp breaker. If you use 12 gauge use a 20 amp breaker.
At 120 volts a 15 amp breaker can be loaded to 1800 watts before it will trip. If it is a continuous load then the electrical code states that it is only allowed to be loaded to 80%. This will be 1800 x .8 = 1440 watts. If the voltage is not 120 volts use the following equation Watts = Amps x Volts. Amps being the breaker size that is to be used.
Wattage (power) is not stored in a breaker; in its tripped position, electrical power form the power line is disconnected. When the breaker is activated, electricity (power) flows through the breaker to the circuit in the home. Using the formula below, you can find the wattage the breaker can handle, not how much it has. Watts = Volts x Amps = 120 volts x 15 amps = 1800 watts A toaster requires 1500 watts of power, so if you are running a coffee maker which probably requires 700 watts or more and turn on you toaster, that 15 amp breaker will trip.
Watts is the product of amps times volts. If you are asking how many watts can be put on a 15 amp circuit breaker then 15 x 120 = 1800. This will probably trip the breaker because it is close to the breaker threshold. So lets say 1600 watts.
A 12 gauge wire on a 20 amp breaker can handle 2,400 watts. The electrical code states it can never continuously be loaded to more than 80% which equates to 1,920 watts.
Since baseboard heaters come in many different wattages vs. lengths I guess the best answer would be, you can load up to 2880 watts of baseboard heaters on a 15 amp two pole breaker at 240 volts.
1500 watts at 120 volts will pull 12.5 amps. If you are wiring a 120 volt home circuit for this I would use AWG # 12 wire on a 20 amp breaker.
A 20 amp breaker on 120 volts will trip the breaker when the total wattage goes over 2,400 watts. But you should never load the circuit more than 80% which would be 1920 watts.
To answer this question the voltage of the circuit from the 30 amp breaker must be given.
If your not interested in safety or wiring codes use the formula. E x I = Va(Watts without knowing Power Factor.) E is your voltage at the source (Breaker) 110v, 115v, 117v. I is 15amp the breaker is rated for. X is your number of bulbs. example. 110 x 15 = 60X : 60x = 1650 : 1650/60 = X Please do not attempt doing this hookup. % If your not interested in safety or wiring codes use the formula. E x I = Va(Watts without knowing Power Factor.) E is your voltage at the source (Breaker) 110v, 115v, 117v. I is 15amp the breaker is rated for. X is your number of bulbs. example. 110 x 15 = 60X : 60x = 1650 : 1650/60 = X Please do not attempt doing this hookup.
15 amps at 80% = 12 amps continuous. Watts = Amps x Volts.