This was a sub panel for a guest house that was above a garage.
Not sure. what do you think?
Yep, fused neutral. No good.
What makes it “fused neutral”
Well, the white wire (neutral/grounded conductor) is connected to a fuse.
Back in the 20’s and early 30’s, fused neutrals were relatively common. Codes changed after it was discovered that a fused neutral can present a serious safety hazard.
When the fuse on the neutral blows, it gives the false impression that the circuit is not energized, when in fact, it’s just waiting to bite you.
I will keep that in mind
Was some of the wiring knob and tube?
No i dont believe so
Not to mention an open neutral on a MWBC will allow the voltage to divide on the two circuits based on the resistance of those circuits. Might be saying good bye to a lot of sensitive electronic equipment if that neutral fuse blows.
Exactly and trying to explain this to an amateur electrician that twin taps on Neutrals could lead to a lot more damage then twin taps on a breaker is hard .
That is also a 3 phase disconect not allowed in a Home system.
Also twin tapps .
It is just bad and needs immediate repair by a qualified person.
To the best of my knowledge, most 3 phase disconnects can be used for single phase loads.
Could be a Canadian thing. You are right…you would just have a set of lugs not being used.