A 120 volt, 600 watt light draws approximately 5 amps. In the US, electrical codes specify that continuous load current should not be more than 80% of the breaker rating, so a 10A breaker would be the minimum size standard breaker.
However, if this is a practical situation (as opposed to a basic arithmetic problem), it would be very unusual to put in a 10A circuit. Most residential lighting circuits are designed to carry 15A, even if that is not the immediate requirement. The occupant could decide to increase the load in the future.
You need a 60 amp breaker.
The formula you are looking for is I = W/E.
50W@12V is 4.2 amps, so any breaker rated that or higher should work.
Minimum size is 10 gauge with a 30 amp breaker. To be safe I would install an 8 gauge with a 40 amp breaker.
If it is a portable generator the breaker should be self contained within the generators panel. If the generator is a stationary standby unit a voltage has to be stated to calculate the conductor size and hence the breaker size to protect the conductor. Amps = Watts/Volts.
50amp but if considering the breaker cannot withstand starting current you need to size the breaker up.
You need a 60 amp breaker.
# 1 awg if in Canada not sure about us codes
The pool light is usually on a 15 amp circuit. The breaker feeding this circuit must have a GFCI rating.
The formula you are looking for is I = W/E.
6
8 AWG is typical.
50W@12V is 4.2 amps, so any breaker rated that or higher should work.
The breaker protects the wiring not the boiler. 12,000 watts at 240 volts will require 50 amps. So, you will need a 60 amp breaker using AWG# 6 wire on a dedicated circuit.
Its been a while since ive brushed up on my electricity knowledge, but im fairly certain that breaker capacities are based on amps. I think you would have to know the amperage of the motor before you were able to conclude what size you need.
It is not the number of bulbs that you worry about. It is the wire size that is your concern. If the circuit is wired with AWG 12/2 wire then use a 20 amp breaker. If it is wired with a AWG 14/2 wire then use a 15 amp breaker. You are protecting the wiring with the correct size breaker.
Minimum size is 10 gauge with a 30 amp breaker. To be safe I would install an 8 gauge with a 40 amp breaker.