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Connect single pole load to double pole breaker
Question:
Can I connect 120 volt 30 amp single-pole load to 30 amp double breaker?
Isn't a 30 amp double pole breaker is same as two 30 amp single pole breakers stuck together, so I can put 30 amps on each leg?

Correct answer: No
Rule of thumb: The breaker is rated for total amps.
A double pole breaker is 2 single poles with a joined handle.
A double 30 amp breaker is actually 2-15 amp breakers put together.
Always put your 120 volt loads onto a single breaker for correct protection.

Question:
If you totally loaded a panel up with only single pole breakers you can put 200 amps on each leg?

Correct answer: No
Rule of thumb: The breaker is rated for total amps.
200 amps on each leg is 400 total amps.
200 amp service has total 200 amp, or 100 amps per busbar (per leg).

Question:
Can I put 100 amps on one leg, and 5 amps on another leg?

Correct answer: No
The busbar cannot be overloaded on one leg, no matter 120-240 single-phase or any-voltage 3-phase.
The phases must be balanced within percentages.
An unbalance load will put the power conpany's transformer out of phase. You will not have the correct waveform on your electric service.
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