Safe fused sour isolation palava

[Pete999]

Since most domestic MCBs are single pole, and it's not unknown to have reverse polarity on the supply tails, how is it safer to isolate at an MCB rather than at a SFCU?

True but we are talking "what if's "

 

[HandySparks]

True but we are talking "what if's "

I've seen more reverse polarity supplies than SFCUs with L+N swapped.