When planning the end your baseboard heater settings, it’s vital that you store your amp breakers in mind. Many US families have a 20-amp circuit. The crucial question come answer is ‘how numerous baseboard heaters deserve to you placed on a 20-amp circuit?’.

You are watching: How many baseboard heaters on one circuit

The prize is rather self-evident: The network amp attract of every baseboard heaters on the exact same 20-amp breaker has to be less 보다 20 amps.

Now, the vital question is how plenty of amps do baseboard heaters draw. Voltage is the key below (due come the straightforward power equation; P = i x V).

We’ll watch into how you calculation how numerous baseboard heaters can be placed on a 20-amp circuit and check how numerous amps carry out baseboard heaters draw. Us will likewise show 2 examples of perfect baseboard settings for a 20-amp circuit.

Here’s the summary on what is the preferably baseboard heating pack that may be linked to ~ above a 20 amp circuit breaker:

If you usage 120V baseboard heaters, the 20-amp circuit have the right to support a net complete of 2,400 W. That’s one 2,000 W baseboard heaters or two 1,000 W baseboard heaters.

If you usage 240V baseboard heaters, the 20-amp circuit deserve to support a net complete of 4,800 W. That’s two 2,000 W baseboard heaters or three 1,500 W baseboard heaters.

In short, a 20-amp circuit deserve to handle everywhere from 2,400 W come 4,800 W the baseboard heater electrical power input. It all counts on the voltage.

Let’s inspect how countless amps do standard electric baseboard heaters draw:


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How numerous Amps perform Baseboard Heaters Draw?Example 2: have the right to We put A 3,000 W electric Baseboard Heater top top A 20-Amp Circuit?

How countless Amps perform Baseboard Heaters Draw?

Here’s how plenty of amps carry out baseboard heaters on 120V and also 240V draw:

Baseboard Power:Amp draw (at 120V):Amp draw (at 240V):
500 W4.17 amps2.08 amps
750 W6.25 amps3.13 amps
1,000 W8.33 amps4.17 amps
1,500 W12.5 amps6.25 amps
2,000 W16.67 amps8.33 amps
3,000 W25 amps12.5 amps

Let’s fix 2 instances to show the distinction the voltage makes once sizing baseboard heaters to a 20-amp circuit.

Example 1: How countless 1,500 W Baseboard Heaters deserve to You Hook as much as 20-Amp Circuit?

The typical power input because that a baseboard heater is 1,500 W. We require to recognize how countless amps walk a 1,500 W heater draw.

To calculation the amps, we usage the straightforward electric power equation:

P (Watts) = ns (Amps) x V (Volts)

We understand the watts (electrical power) and also volts (electrical potential). Let’s express the amps (electric current):

I (Amps) = ns (Watts) / V (Volts)

We have actually a 1,500 baseboard heater. Let’s see how numerous amps walk it need to run if we use a 120V circuit or a 240V circuit:

I (Amps at 120V) = 1,500 W / 120 V = 12.5 A

I (Amps at 120V) = 1,500 W / 240 V = 6.25 A

As we deserve to see, the 1,500 W baseboard heater paint, etc 12.5 amps in ~ 120V, and also 6.25 amps in ~ 240V.

That method that we deserve to use a 1,500 W baseboard heater on a 20-amp circuit.

However, if we have a 120V circuit, we can only usage one 1,500 W heaters (it only has a 12.5 A draw). Why? Well, if we would attach two together heaters, the complete amp attract would it is in 25 amps. This would surpass the volume of a 20-amp circuit.

Here’s what’s interesting:

If we have a 240V circuit, we can connect up to three 1,500 W baseboard heaters. That’s due to the fact that its net amp attract is 3 x 6.25 A = 18.75 A. This is less than 20 A.

That means that us can connect three 1,500 W heaters, netting a complete output that 4,500 W, if we have a 240 V circuit. If we have actually a 120 V circuit, you have the right to only connect one 1,500 W heater, v a net electric power input being only 1,500 W.

Note: us can additionally put one 120 V 1,500 W heater + one 240 V 1,500 W heater top top a 20-amp circuit. This full amps right here are 12.5 A + 6.25 A = 18.75 A; much less than 20 A. In this way, a 20-amp circuit deserve to support 3,000 W worth of electrical baseboard heaters.

Example 2: deserve to We placed A 3,000 W electrical Baseboard Heater ~ above A 20-Amp Circuit?

If us calculate a little bit (or girlfriend can inspect the table above) we watch that:

At 120V, a 3,000 W baseboard heater draws 25 amps.At 240V, a 3,000 W baseboard heater draws 12.5 amps.

Now, a 20-amp circuit deserve to only handle devices that attract up come 20 amps. We deserve to see that, if we have a 240V circuit, we deserve to run a 3,000 W heater on a 20-amp circuit. That’s because it draws much less than 20 amps; 12.5 amps, to it is in exact.

Using the exact same reasoning, we can’t attach a 120V 3,000 W baseboard heater. That’s due to the fact that it paint, etc 25 amps; too much for a 20-amp circuit.

If you’re in a market for electrical baseboard heaters, you space welcome to inspect out our list of the best electric baseboard heaters here. If you likewise have any kind of questions around how huge a baseboard heater girlfriend can attach to a 20-amp breaker, you have the right to pose the inquiry in the comments and also we’ll shot to help you out.

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2 think on “How countless Baseboard Heaters ~ above A 20-Amp Circuit? (2400-4800 W)”

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Q:your explanation that says you deserve to have a 120 voltage baseboard heater and a 240 volt heater on the same circuit.I’m no electrician,but I have actually a simple understanding,and what her implying is you deserve to run both120 volt,and 240 volt top top the exact same 240 volt circuit!Seems favor this is either wrong information,or your going to short out the 120 volt heater!possibly bring about a fire,although i plugged mine grinder right into a modification 120 circuit that was looped to create 240….it just ran faster…but for just how long,before it burns out,same because that the heater,although ,my point of veiw might be wrong,I just wanted to question your information!as I’m placing in a 2500 watt baseboard heater on 120,or execute I need 240 circuit?

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