# FAQ: How Many Amps Does A 1500 Watt Heater Use?

## What size breaker do I need for a 1500 watt heater?

A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. Because a 15-amp breaker would be too small, you need a breaker with the next highest rating, which is 20 amps. Include the current draw of any other devices on the circuit when calculating the breaker size.

## How many amps do I need for 1500 watts?

Using the W ÷ V = A variation of Ohm’s law, you can calculate that 1,500 watts ÷ 120 volts = 12.5 amps.

## What size breaker do I need for a 2 1500 watt heater?

A 20-amp breaker can support any combination of heaters up to a total of 3,840 watts. For example, using a single thermostat, the breaker could support two 1500-watt heaters or three 1000-watt heaters.

## Are all 1500 watt heaters the same?

An electric space heater rated at 1,500 watts will use the same amount of power (1,500 watts), producing the same amount of heat regardless of what you pay for it. An electric space heater rated at 1,500 watts will put out the same amount of heat regardless what you pay for it.

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## How many watts can I run on a 20 amp circuit?

A 20-amp breaker can support up to 2,400 watts on a single circuit. The safe maximum for a 20-amp circuit is 1,920 watts, but circuits should not be loaded to more than 80 percent of their maximum capacity.

## How many amps does a space heater pull?

A 1500 watt space heater (on high setting) will draw 12.5 Amps. When a few lights or a television are on the same circuit, the 15 Amp limit is quickly reached and the breaker will trip.

## What size breaker do I need for a 42 amp heater?

Your heater draws 10,000W / 240V= 41.67A, Since it will be on for more than 3 hours at a time, it is a continuous load, and the circuit supplying it must be sized at no less than 125% of the load. 41.67A X 1.25 = 52.08A. You need a 60A circuit protected by a 60A 2-pole breaker.

## How many amps does a 3kw heater use?

3kw is just over 13 amp 3000/230 = 13.04 amps and given the circuit is a radial fed with a 16 amp breaker with nothing else on it, the fcu is doing nothing of use and is un-necessary. Also adding 3kw heaters onto a ring will likely overload it.

## How many heaters can you have on a 20 amp breaker?

So a 240-volt circuit running on a 20 – amp, double-pole breaker, can have any combination of heaters up to 3,840 watts. For example, using just one thermostat, you can install: Two 1,500 watt heaters, or. Three 1,000 watt heaters, or.

## How many receptacles can be on a 20 amp circuit?

Although the National Electric Code (NEC) doesn’t directly rule on limiting outlet installments on your circuit, it is crucial to learn its power draw restrictions. In general, you should have a maximum of 10 outlets on a 20A circuit.

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## Which fuse is most suitable for the electric heater?

The aR-type fuse is most suitable for this type of application since they are faster acting than the gR-type fuses. The aR-type fuse is often labeled as ultra-fast or ultra-rapid. Each wire in the branch circuit supplying the temperature controller should have an aR-type fuse installed.