Darrell Udelhoven
03-05-2010, 06:40 PM
National Electric Code: non breakered 30-amp conductor coming directly off main buss bar connected directly to main conductor lugs.
Only a 500 or 600-amp residential TR fuse to blow - until it gets to an unlabeled A/C breaker box in the basement.
The 30-amp conductors are out in the open, (No conduit) go to an unlabeled breaker box, that goes to an A/C condenser where the disconnect is stuck & can't be pulled.
There are NO notices that when the main breaker is tripped that circuit is live with only a 500 or 600 TR fuse protecting to the 30-amp breaker box in the basement which most won't even know goes to the A/C.
Remember the 115-volt control circuit won't have any power, so a TH test tells you nothing.
This will be that way for the unknowing to make a fatal mistake for eternity, unless the situation is addressed; home owner's don't want to do anything about it or tell anyone about it, though selling it soon.!
I know how careless we HVAC contractors can get when we are sure the main has all circuits killed.
What does the National Code say, & is it thorough enough for this situation? - Darrell
Only a 500 or 600-amp residential TR fuse to blow - until it gets to an unlabeled A/C breaker box in the basement.
The 30-amp conductors are out in the open, (No conduit) go to an unlabeled breaker box, that goes to an A/C condenser where the disconnect is stuck & can't be pulled.
There are NO notices that when the main breaker is tripped that circuit is live with only a 500 or 600 TR fuse protecting to the 30-amp breaker box in the basement which most won't even know goes to the A/C.
Remember the 115-volt control circuit won't have any power, so a TH test tells you nothing.
This will be that way for the unknowing to make a fatal mistake for eternity, unless the situation is addressed; home owner's don't want to do anything about it or tell anyone about it, though selling it soon.!
I know how careless we HVAC contractors can get when we are sure the main has all circuits killed.
What does the National Code say, & is it thorough enough for this situation? - Darrell