Mini-Split Wiring Question


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Old 01-04-23, 03:19 AM
SJMaye's Avatar
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Mini-Split Wiring Question

I want to add a mini-split heat pump to my detached garage workshop this year. I have several questions, but for now I will confine it to the most immediate need; power supply wiring.

My workshop is 24' x 24'x10' high ceiling. The HVAC contractor I spoke to recommended a 240V, 24,000 BTU mini-split. In looking at several of these units they show they use 10 amps.

I will need to add a new circuit for this. The distance from the circuit breaker to the AC disconnect will be approximately 100'. Would I need to run 20A or 30A service? And what size wire would I use?
 
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Old 01-04-23, 02:02 PM
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Connect the A/C to an existing panel in the building or run a new separate line ?
By code you are only allowed one circuit to a detached building.
That means you would run a larger cable and then use a sub panel in the building.
What do you have currently for power in the building ?

A 20A circuit using 12/2 w/g cable would be ok.
 
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Old 01-04-23, 03:13 PM
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I have a 100 amp sub-panel in the new, detached garage. 12/2 w/g is what I ran for all my outlets on a 20A circuit. I guess since the mini-split is running 240V I expected something different.

OK. 12/2 w/g. Got it. Thanks.



 
 

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