Correct circuit breaker and wire size for 2 A/C units

Specific Inspection Topics Electrical Inspections
1

Hoping you guys can help me determine the correct wire size and circuit breaker i need for my air conditioners. Both units were installed 3 years ago and the company that performed the installation never said anything about installing new breakers or wire so I assumed everything was good.

This is what I do know about both units:

-Wire size for both units to the breaker box = 8 AWG copper
-Both units are about 40 feet (one way) from the breaker box
-The large unit (34 AMP MCA, 60 AMP MOP) is on a two pole 50 AMP at the breaker box and has a 60 AMP non-fused disconnect outside
-The small unit (22 AMP MCA, 35 AMP MOP) is on a two pole 50 AMP at the breaker box and has a 60 AMP non-fused disconnect outside.

I’ve been doing some reading on the internet about what is acceptable, in terms of wire size and fault protection, and it’s a bit overwhelming for someone not familiar electrical standards.

Does this electrical configuration look correct to you guys? Thanks in advance for advise you can provide.

-kyle

2

The small unit needs a maximum OCPD of 35 amps or less. With an MCA of 22 it could be 25 amps. The conductor size is OK.

3

In addition, the 60 amp disconnect is the maximum circuit it can be used on.

4

Hello Kyle,

So your net change will be to replace the 50 amp breaker with an HACR breaker (use the proper brand/type for the panel) of between 25 to 35 amps and you should be good to go.

5

And hire an electrician.

6

Thank you gentlemen for taking the time to reply. Much appreciated.
-keith