AC wiring..

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B4T

B4T

Senior Member
Location
Long Island, N.Y.
I have to do an estimate for a AC split system with blower in computer room and condenser on rooftop.. both 460V.

Both units have a combined WSA of 46.2A and a FLA of 38.4 with OPD of 21A and 30A.

Is there anyway I can run #8 to a point above ceiling and feed blower motor and then run #10 out to condenser?

Having OPD above ceiling for condenser is what has me stumped..
 
D

danickstr

Senior Member
Even if you could gutter tap it, it seems like more work in the ceiling than running one pipe of 2 sets of wires and just j-boxing them at a split point.
 
Dennis Alwon

Dennis Alwon

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Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
BLACK4TRUCK said:
Yes.. I am trying to find some way of getting past 110.26 legally.. sometimes there are exceptions that only a select few know about.
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I am not one of those select few. I know someone who got hit on that 20 years ago-- :). I was feeding a furnace under the house and an outdoor a/c unit and it was too hard to get 2 feeds so... I actually didn't think about 110.26
 
Dennis Alwon

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
If you can't get 2 circuits then pull the #8 to a JB and use #8 to both the a/c and the blower. Use fused or breaker disconnects at the unit.
 
B4T

B4T

Senior Member
Location
Long Island, N.Y.
Dennis Alwon said:
If you can't get 2 circuits then pull the #8 to a JB and use #8 to both the a/c and the blower. Use fused or breaker disconnects at the unit.
Click to expand...

I can get two circuits, but I am wiring this up using MC and space for running wires into the panel is tight.

There is a 14" space below panel I have to core bit through the concrete floor, so I was trying to keep the hole small as possible.
 
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