Need help with older electric baseboard wiring Please

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Old 12-31-13, 03:03 PM
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Need help with older electric baseboard wiring Please

Hello all,thanks for reading
I just purchased an older Sentinel AB7 electric baseboard heater to use in a small room ,little confused on the wiring.It reads on the panel 277vac 17 amps.Figured I would need to purchase a double pole 20 amp breaker using 12/3 wire.When I cracked open the panel there are only 2 red wires,a ground on the casing and no neutral wire just the 2 red.
Are both these red wires hots that go to the breaker?

I attached pics,hopefully someone can help me

thanks very much for your time,really appreciate it
 
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Old 12-31-13, 03:23 PM
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It reads on the panel 277vac 17 amps
277 volts is commercial not residential. If this is a house you do not have 277 volts. If no fan it might work to some extent on 240 volts but you will give off less heat.

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When I cracked open the panel there are only 2 red wires,a ground on the casing and no neutral wire just the 2 red
Neutral is only used for 120 volt devices.
 
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Old 12-31-13, 07:05 PM
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It appears the thermostat is a 2 pole thermostat which would be a little unusual since a 277 volt circuit has one hot wire and one neutral wire. Where did you get this heater? I suspect it was previously used in a residential setting and was wired to 240 volts, like you are going to do. Yes, it'll work, but at a reduced wattage.
 
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