What size breaker do i need for a 4000 watt heater?
If you have a heater that uses a total of 4000 watts in a 240 volt connection, you'll need a minimum of 20 Amps. If it's only a 120 volt connection, you'll need a minimum of 35 Amps in the circuit. However, if you need to plug anything else into the same circuit, you'll want an even higher amperage to avoid blowing the breaker.
Let's Get It Fixed!
Our virtual experts can diagnose your issue (for free!) and resolve simple problems.
