CB wiring

I noticed that the circuit breaker terminals in my panel are are marked "Line" and "Load.". Is it critical that they be wired that way? What will happen if the line and load are switched?

Lefoy84 said:

I noticed that the circuit breaker terminals in my panel are are marked "Line" and "Load.". Is it critical that they be wired that way? What will happen if the line and load are switched?

Click to expand...

I used to be religious about keeping 'line' and 'load' connected as marked. Then I argued with some of the fine folks here and decided to verify. I emailed Potter/Brumfield (now Tyco) and was told that it just didn't matter. He stated that the only reason they marked the tabs 'line' and 'load' was to get a UL listing. Said that they work the same, hooked up either way.

Web

Thanks Webb. I guessed as much.

Thermal type breakers will, but some DC breakers (such as used in solar power systems) are magnetically biased, and won't....