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7,205 Posts
Really the risk is just overloading a neutral conductor.
Lets just say the normal circuit gets loaded to 75%.. but then you've stolen that neutral to be the return for another circuit.. and you're loading that circuit to 75%.. that neutral could have 150% of it's rated power going through it.
That equates to heat, the insulation could over heat and break down and you could lose the neutral. Losing a neutral can be a really bad thing, destroying equipment.
If someone's going to pull the hot (switch leg) through the EMT, just pull it's neutral along for the ride.
Lets just say the normal circuit gets loaded to 75%.. but then you've stolen that neutral to be the return for another circuit.. and you're loading that circuit to 75%.. that neutral could have 150% of it's rated power going through it.
That equates to heat, the insulation could over heat and break down and you could lose the neutral. Losing a neutral can be a really bad thing, destroying equipment.
If someone's going to pull the hot (switch leg) through the EMT, just pull it's neutral along for the ride.
