Reply to "Testing circuit breaker...Stumped!"

C W BurfleOGR Forum Member

RJR posted:
CW, my breakers are wired exactly as you describe, BUT, even though I don't do it, there should also be a breaker in the common. If, for purpose of discussion, the max current that should be allowed in a ZW is 10 amp, and you have 7-amp breakers in each of the 4 outputs, then one could have up to 28 amps flowing through a portion of the windings. Just a thought.

Any transformer that crosses my bench has a properly working internal breaker, hence there is no need for an external breaker on the common.

Having a fifth breaker on the common side wouldn't hurt anything. The important point is that having a single external breaker on the common side is not a good solution because it is very easy to accidentally create an unprotected short between two "hot" terminals.

2/13/188:06 PM

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