On Dec 13, 3:44 pm, "RBM" rbm2(remove wrote:
I'm not understanding you. On some panels, one leg of buss would be longer
to reach a horizontally installed main breaker. A 120 volt GFCI breaker has
a white wire on it that gets installed on the neutral buss.



Yes, it had the 20 volt GFCI breaker with a white wire on it
installed on the neutral buss.

The other white wire from the black/white pair, was initially
connected to the neutral of the GFCI.

When it was removed, it measured 240 VAC to the black of another
circuit breaker output.

That was the surprise and confusion.