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Bad HVAC wiring

OK...I got a minute now and noone else is biting......Cu to Al conductors without a proper connector, condensate pump wired direct to SEU for air handler, no grounding for pump or metallic box, the j-box is fastened to the equipment where the maker says not to.....Ohh no disconnect either....It'll take me a bit to get NEC sections, but I will if I get a chance....
 
steveray said:
OK...I got a minute now and noone else is biting......Cu to Al conductors without a proper connector, condensate pump wired direct to SEU for air handler, no grounding for pump or metallic box, the j-box is fastened to the equipment where the maker says not to.....Ohh no disconnect either....It'll take me a bit to get NEC sections, but I will if I get a chance....
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How many KW of heat? and what size conductors on the SE?
 
I would want to know what size conductors and see if the box is legitimate. Where is the disconnect and if there is a disconnect why not go directly into the unit. Looks like the ec didn't want to buy copper down to the unit. What size kw- what size breaker-- it looks like this unit needs to circuits run to it- not one
 
At least yours was in a box. Dispatched to smoke coming from ceiling tiles. Owner says new AC installed yesterday. Ladder roof, unit froze up. Pulled celing tiles, wires to unit burned. Hot to Hot, Netural to Netural, ground wire nutted off. No ground, no bonding, breaker did not throw, wires still hot when we found them. Zip tied to line set.

View attachment 967

View attachment 967

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Dennis said:
I would want to know what size conductors and see if the box is legitimate. Where is the disconnect and if there is a disconnect why not go directly into the unit. Looks like the ec didn't want to buy copper down to the unit. What size kw- what size breaker-- it looks like this unit needs to circuits run to it- not one
Click to expand...
I was thinking sizing also. And I also would be willing to bet there was no EC involved
 
There must have been something else going on before because those arcy sparkies on the cover don't seem to line up with the wires and I don't see any smoke on them.
 
gfretwell said:
There must have been something else going on before because those arcy sparkies on the cover don't seem to line up with the wires and I don't see any smoke on them.
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If you flip the lid left to right the arcs line up

These are good example why a mechanical contractor should also be required to hold an electrical masters or sub to one.
 
He used al cause its cheaper than copper, that Amer.stand/Trane ahu has a breaker on the heat kit for dissconnecting. The jbox would work if it was deeper and the condenstate pump was fused internally in the unit. No law on mounting a jbox or dissconnect to the unit, done a bunch of em that way. my guess is he didnt have the 1-1/2 connector for the k.o. in that unit, thought his ideal would work. Electrical Masters???Really? hey lets try to learn man. J and duct size first!!
 
".....hey lets try to learn man. J and duct size first!!"

Also agree......

The instructions on the unit say that you can only fasten to the case in the top 3.75"......The Aluminum wire was already in place from the original instal circa 1983?ish....
 
Ah yes, I stand corrected! I forgot those ahu's are the new "doublewall" and there is some low voltage wire in the walls. Best case would be a dissconnect mounted on the wall with a circuit for the pump dont ya think? Good catch man.
 
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