Question about Fahrenheat Electric Convector Baseboard Heater, 240 Volt

I Also Have F2543 But My Problem is What Size Circuit Breaker Do I Need ????

I Have A 240 Volt& 750 Watts

Re: What Size Circuit Breaker

A 750 watt heater at 240 volts draws 3.15 amps so a 2 pole 15 breaker with 14/2 wire would be fine

Posted on Nov 13, 2007

A number 12 copper supply cable at the voltage is overkill for this load.

Ohm's Law states: Watts = Volts x Amps. To find Amps: Amps = Watts / Volts. This is 1500W / 240V = 6.25 Amps. Since the max continuous load for a 14 copper is 12 Amps, this size wire is the correct size.

Check to make sure the heater is in fact a 240 volt type, as if it is a 120 volt type, you are likely instantly burning out the heating element. If it is indeed a 120 volt heater, you will need to connect to a single pole 15 amp breaker and place the other wire that was on the breaker to neutral to provide the correct voltage. The load will still be 1500W, but at half the voltage, the current will double to 12.5 amps, and may cause the circuit breaker to trip after a while.

I hope this helps & good luck.

Ohm's Law states: Watts = Volts x Amps. To find Amps: Amps = Watts / Volts. This is 1500W / 240V = 6.25 Amps. Since the max continuous load for a 14 copper is 12 Amps, this size wire is the correct size.

Check to make sure the heater is in fact a 240 volt type, as if it is a 120 volt type, you are likely instantly burning out the heating element. If it is indeed a 120 volt heater, you will need to connect to a single pole 15 amp breaker and place the other wire that was on the breaker to neutral to provide the correct voltage. The load will still be 1500W, but at half the voltage, the current will double to 12.5 amps, and may cause the circuit breaker to trip after a while.

I hope this helps & good luck.

Sep 25, 2012 | Heaters

if you are running a new circuit for this one heater than a simple 2-pole 15 amp breaker will do fine, it is also acceptable to use a 2-pole 20 amp breaker, as long as you are in the united states. since you have such a small unit you can put 7 of these heaters on one 20 amp breaker.

Jul 21, 2010 | Fahrenheat Electric Hydronic Baseboard...

the baseboard heaters out put goes down a lot more than you would think when used on 120 volts ... thats because not only is the voltage half of what it should be, the current is also half .. so the total power (the product of voltage and current) is one fourth of what it would be if operated on 240 volts .. you are operating at only 186 watts instead of the 750 watts you should have .. so you would have to have 4 times as many heaters for the same heat output .. you likely have the 240 volts available (most houses do) .. there are two phases .. each 120 volts .. when both phases are used together then you get the 240 volts total .. another option is you can use heaters designed for 120 volts .. the current would increase to a little more than 6 amps per heater .. some heaters have a jumper you can move for 120 volt service or 240 volt service... you can use those with either voltage ..

Sep 12, 2009 | Fahrenheat Electric Convector Baseboard...

Yes, a 20-amp, double pole breaker will easily support that heater.

The calculation:

Watts = Volts x Amps

750 watts = 240 volts * x

x = 3.1 Amps

Charlie

The calculation:

Watts = Volts x Amps

750 watts = 240 volts * x

x = 3.1 Amps

Charlie

Aug 22, 2009 | Heaters

If there is a 15 amp breaker on this circuit now. Then I would assume the the wire to this breaker is only capable of handling that size and NOTHING larger. There are to many variables. You need to know the maximum amp draw rating of the device. The wire size going back to the service entrance (fuse box). You will also need to know the total power draw of the service entrance to determine if the box can handle the total load. Are there any other branches off of this circuit? I suggest that you get advice from an electrician. If you overload the circuit, you may think everything is ok. But you can cause a major problem. I do not think that you want to take the chance of overloading a circuit. This can cause a fire and or death. Have this inspected by a professional. If you insist on doing it yourself.... contact your local building inspector for guidance.

Apr 21, 2009 | Fahrenheat Electric Convector Baseboard...

check on the wiring diagram. You may be looking at 2-15 amp or 2-20 amp breakers.

Nov 12, 2008 | Fahrenheat Electric Convector Baseboard...

yes, you did a good job. Sounds like you paralled them. Which is right buuuut what size are these heaters. Add the wattage of all of the heaters and divide by 120 and that is how much current you will be using. On a 20 amp breaker you can only pull 16 amps safely. I think you will be way over unless the heaters are 600 watts each. You are allowed 1800 watts on a 20 amp circuit.

Nov 06, 2008 | Fahrenheat Electric Convector Baseboard...

Convert the watts to amps or get the amp rating off the device, this will tell you the minimal wire size, and then you will need to measure the distance from the breaker to the device, that will determine if the wire size needs to be increased for a long distance.

Example the 1500 uses 20 amps and 20 amps requires #12. 20 amps on a #12 is good for 100 feet anything further and you have to go up a wire size.

Take the amp rating and distance to the hardware store and they will have the chart and the correct wire for you to use. In the US 220 or 240 used to be three wire, 2 hots and a neutral through a double pole breaker, now the new NEC rules demand 4 wires for 220 volt devices, so you will need to check with whatever local code authority as to what they want on new installs versus replacement, if you are grandfathered in some way.

As to the four wires above, from the box, is that the heater box or circuit breaker box? In either case, the two hots go through their own breaker, called a double pole breaker, at the correct amperage rating. the white which is neutral and yes ground, is tied to the neutral bar in the breaker box, the bare or green, goes from the frame of the heater or the chassis, some common metal part, probably a green screw in the heater, and then in the breaker box, it will wire in with the rest of the bare grounds, this is a four wire 220 connection where they have quit using the white neutral as the only ground, and have insisted on adding this fourth bare chassis ground.

Once you have the correct wire size for the amperage, and the correct breaker size, and the wire size does not exceed the max limits for the size, you should be good to go.

However if you are concerned you can pull this off, pay a pro to do it, it is not worth a fire on a heater wiring job, for a few bucks on the install, it happens to often and not worth it, I have written on hear now several times, and have no responses, I have over thirty years in electrical devices including NEXRAD RADAR, motors above 5000 HP and understand all this, and the dangers.

Again wbwill@sbcglobal.net, or allexperts.com

I am not sure about fees, if there are any they go through this system in all fairness.

Will

Example the 1500 uses 20 amps and 20 amps requires #12. 20 amps on a #12 is good for 100 feet anything further and you have to go up a wire size.

Take the amp rating and distance to the hardware store and they will have the chart and the correct wire for you to use. In the US 220 or 240 used to be three wire, 2 hots and a neutral through a double pole breaker, now the new NEC rules demand 4 wires for 220 volt devices, so you will need to check with whatever local code authority as to what they want on new installs versus replacement, if you are grandfathered in some way.

As to the four wires above, from the box, is that the heater box or circuit breaker box? In either case, the two hots go through their own breaker, called a double pole breaker, at the correct amperage rating. the white which is neutral and yes ground, is tied to the neutral bar in the breaker box, the bare or green, goes from the frame of the heater or the chassis, some common metal part, probably a green screw in the heater, and then in the breaker box, it will wire in with the rest of the bare grounds, this is a four wire 220 connection where they have quit using the white neutral as the only ground, and have insisted on adding this fourth bare chassis ground.

Once you have the correct wire size for the amperage, and the correct breaker size, and the wire size does not exceed the max limits for the size, you should be good to go.

However if you are concerned you can pull this off, pay a pro to do it, it is not worth a fire on a heater wiring job, for a few bucks on the install, it happens to often and not worth it, I have written on hear now several times, and have no responses, I have over thirty years in electrical devices including NEXRAD RADAR, motors above 5000 HP and understand all this, and the dangers.

Again wbwill@sbcglobal.net, or allexperts.com

I am not sure about fees, if there are any they go through this system in all fairness.

Will

Apr 28, 2008 | Fahrenheat Electric Convector Baseboard...

take a close look at the tubular element with a magnifying glass. the volts value should be stamped into the element. most baseboard heaters are 240 volt at low, high and medium density. wattage could be from 750 to 1500 watts

Jan 09, 2008 | Fahrenheat Electric Convector Baseboard...

if the heater is 120 volt or 240 volt its really pretty easy. at either end is a cover. remove the cover and you'll see a wirenut or maybe just two wires. one side has an integral thermostat. connect your supply to the two wires on the thermostat. connect the other end in your breaker box with the appropriate sized circuit breaker. wire size feeding it will depend on its current draw. how many watts is the heater? 1500 watts will draw 6.25 amps at 240 volts so you can use 14 ga wire. 2000 watts will draw 8.3 at 240 volts - so 14 ga is still ok. 2500 watts at 240 draws 10.41 amps. 3000 watts draws 12.5 amps at this stage I'd use 12 gauge on a 20 amp breaker.

Oct 25, 2007 | Fahrenheat Electric Convector Baseboard...

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