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Old 12-09-2012, 10:14 AM   #1
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Two circuits on one 2-pole breaker


I was looking at my service panel and discovered that a single 2 pole 20A breaker is being used to provide power to both a 120 v load (using a neutral) and and 240 v load without a neutral). The combined load is less than 10 amps. Is this arrangement permitted by the NEC?

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Old 12-09-2012, 10:29 AM   #2
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Two circuits on one 2-pole breaker


Yes, you have a MWBC (Multi Wire Branch Circuit) with line to line (240) and line to neutral (120) load.

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Old 12-09-2012, 10:33 AM   #3
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Two circuits on one 2-pole breaker


Yes, done all the time, I generally do it when an air handler is 240v and I need a 120v receptacle located at the unit as well.
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Old 12-09-2012, 10:38 AM   #4
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Two circuits on one 2-pole breaker


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Yes, done all the time, I generally do it when an air handler is 240v and I need a 120v receptacle located at the unit as well.
I like that......that way if you kill power to ether ckt....your killing both....better than have your 121 power from a different breaker.
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Old 12-09-2012, 12:09 PM   #5
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Two circuits on one 2-pole breaker


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Yes, done all the time, I generally do it when an air handler is 240v and I need a 120v receptacle located at the unit as well.
I am not sure I would like that. You turn off the air handler and you lose power to the receptacle for lights and tools.

Unless you use a disconnect for the air handler only.
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Old 12-09-2012, 12:47 PM   #6
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Two circuits on one 2-pole breaker


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I am not sure I would like that. You turn off the air handler and you lose power to the receptacle for lights and tools.

Unless you use a disconnect for the air handler only.
Of course a disconnect is at the AHU... and besides, money is always an issue, so that's what they get.
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Old 12-09-2012, 12:48 PM   #7
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Two circuits on one 2-pole breaker


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I like that......that way if you kill power to ether ckt....your killing both....better than have your 121 power from a different breaker.
Nope.... and I really don't care... Money is time, and time is money.

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