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  • Mini split wiring | Information by Electrical Professionals for . . .
    So I just completed my 2nd mini split install and have a question about the wiring The first one was done about 3 1 2 yrs ago and after completing the wiring the HVAC company said we had to re-pull #14 from the outdoor unit to the indoor units ( we had run #12 as it was a 20A circuit) There reason was its for the signal and MUST be #14
  • Minisplit Wiring | Information by Electrical Professionals for . . .
    Typically the load is outside thus the 20A requirements The Type MC or TC that is being ran inside to the indoor unit in these mini-split cables are 240V with a 24V control wire (thus why Type TC-ER-JP can be used now in one - and two family) The actual load inside is not an issue See attached image
  • Residential Service Load Calculations using high BTU Mini Split HVAC . . .
    Each mini split has the inside fan, outside fan, controls, and compressor all in its nameplate MCA So you can't just take 80% of it to get the true load without the 125% factor on the compressor 90% may be closer but even then you're guessing unless each item in the minisplit has a nameplate amp value so you can derive everything
  • Mini-split A C install | Information by Electrical Professionals for . . .
    I install many mini-split circuits each year Here's how I do them: Run a new circuit out of the panel, up into the attic, and down from the eave next to the mini-split Use UF and sleeve the UF in PVC from the eave to the disco If the panel is close to the mini-split, you can run EMT on the outside of the house to the disco
  • (2) mini-splits, (1) breaker? | Information by Electrical Professionals . . .
    I am adding (2) mini-splits to my home, 240v, 15a max OCP per unit I have room for one DP breaker in my QO panel, I am not interested in adding a sub panel at this time I would like to run 10-2 UF, off one 30A DP GFCI(per Mitsubishi) breaker, this circuit would then hit (2) 30a, fusible A C disconnects, each with 12A time-delay fuses installed
  • Use 10-3 NM-B vs 10-2 NM-B for outdoor mini-split condenser
    Per NEC is it acceptable to pull 10-3 NM-B when only a 10-2 NM-B cable is needed at this time? I understand that the 10-3 provides the "extra" hot (red) conductor, but what does NEC say about the "spare" wire in the cable that is not needed? Cap the white conductor at both ends of the 10-3
  • Do it yourself mini split heat AC | Information by Electrical . . .
    The sellers are advertising these NEW MINI SPLITS as do it your self They say except the electrical They want you to hire a licensed electrician My understanding is the equipment and line set are already full of the gas needed Supposedly you screw them on turn the valve then run the
  • Split A C Systems and Local Disconnect Requirements
    When the indoor unit of a split-system A C unit gets power from the outdoor condensing unit, does the indoor unit require a local disconnect switch if the outdoor unit has a lockable disconnect switch?


















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