ever a need for a neutral to serve mini split HVAC?

[Shovelhead]

Never installed a mini split before and have yet to buy the unit.
It will serve a ~500 sq ft room inside my shop. So a 12-15 BTU unit I believe.
From my research I've not seen the need for a neutral in these units except for the control wiring.

Would there ever be a need for a neutral from the main panel to the outdoor unit?

Plan is to run three #10 THHN(blk,red, green) to serve the outdoor unit.
I thought maybe I should run a neutral wire while I'm at it, in case something in the future may require it. But, I'm not so sure it would ever be needed.
And, I got no white #10. LOL

Thanks

 

[Chuckster in NJ]

See the manufacturers installation instructions for the proper wiring method.

 

[wyliesdiesels]

Do you have a service outlet nearby?

 

[Metal-Marc]

Contact the manufacturer about wiring requirement.

 

[Shovelhead]

Do you have a service outlet nearby?

There will be.
I'm pulling from main panel 3/4" pvc in slab to back wall of shop.
240v circuit for the mini split, and a 120v circuit(#12) to feed an outdoor light, loft/attic lighting and an outdoor receptacle near the mini split unit.

 

[PoorUB]

Then you are pulling a neutral for the outlet, share it if you have too. No need to pull two.

 

[sparky 1971]

There will be.
I'm pulling from main panel 3/4" pvc in slab to back wall of shop.
240v circuit for the mini split, and a 120v circuit(#12) to feed an outdoor light, loft/attic lighting and an outdoor receptacle near the mini split unit.

I use disconnects with the 20 amp gfci already installed in them. They cost more, but in the long run when you consider the box, in use cover, wr gfci, and the time spent dicking around installing a separate receptacle, it's a lot less.

https://www.menards.com/main/electrical/circuit-protection-power-distribution/safety-switches-disconnects/eaton-60-amp-120-240-outdoor-air-conditioner-disconnect/dpu222rgf20wtst/p-1444429559552-c-6435.htm?tid=-2584164489214496315&ipos=5

 

[mike93lx]

I use disconnects with the 20 amp gfci already installed in them. They cost more, but in the long run when you consider the box, in use cover, wr gfci, and the time spent dicking around installing a separate receptacle, it's a lot less.

https://www.menards.com/main/electrical/circuit-protection-power-distribution/safety-switches-disconnects/eaton-60-amp-120-240-outdoor-air-conditioner-disconnect/dpu222rgf20wtst/p-1444429559552-c-6435.htm?tid=-2584164489214496315&ipos=5

That's quite nice

 

[Norcal]

If a A/C unit is 220V 50 HZ, or 120 volts a neutral is required 220 is a line to neutral voltage 208, 240V is a line to line voltage not requiring a neutral.

 

[dave*99]

Never installed a mini split before and have yet to buy the unit.
It will serve a ~500 sq ft room inside my shop. So a 12-15 BTU unit I believe.
From my research I've not seen the need for a neutral in these units except for the control wiring.

Would there ever be a need for a neutral from the main panel to the outdoor unit?

Plan is to run three #10 THHN(blk,red, green) to serve the outdoor unit.
I thought maybe I should run a neutral wire while I'm at it, in case something in the future may require it. But, I'm not so sure it would ever be needed.
And, I got no white #10. LOL

Thanks

You mention a neutral in the control wiring........
I'm installing a Carrier 18K ductless heat pump. The outdoor unit is fed with 240V - 10 gauge on a 30 A circuit. L1, L2,GND. No neutral.

The interconnect between the outdoor unit and indoor unit is a 4 wire cable. L1, L2,GND, and control. So it is 4 wires - but no neutral.

It's labeled Genesis 1070 and it is called mini-split cable. Here is the info from the spec sheet.

Published: 2018-10-19
Mini Split Tray Cable
Part Number: 1070
14 AWG 4 Stranded Conductors
Ratings Type TC-ER-JP 600V FT4, Direct Burial, Sunlight Resistant, Oil Res I
Approvals UL Listed
Construction
Conductor 14 AWG 19 Strand Bare Copper
Conductor Count 4
Insulation THHN (PVC: 0.015" nom. Nylon: 0.005" nom.)
Insulation Colors Black, White, Red, Green
Lay Length
Shielding N/A
Rip Cord No
Jacket PVC (0.055 " nom.)
Overall Diameter 0.390" nom.
Print Legend GENESIS P/N 1070 - 14 AWG 4C MINI SPLIT E123517 (UL) TC-ER-JP 600V FT4 / IEEE 1202 DIR BUR SUN RES OIL RES I 90C DRY 75C WET (RoHS)
Properties
Operating Voltage 600 Volts max.
DC Resistance 2.62 Ohms/1000' at 20°C
Capacitance -
Impedance -
Temperature -20°C to 90°C Dry / 75°C Wet
Flame Rating UL 1277 Tray Cable
RoHS Compliant Yes
Country of Origin USA

 

[dcg9381]

Never installed a mini split before and have yet to buy the unit.
It will serve a ~500 sq ft room inside my shop. So a 12-15 BTU unit I believe.
From my research I've not seen the need for a neutral in these units except for the control wiring.

Find the unit to answer this question. I've got 15k Daikin units, they are 240V (no neutral). They pull under 12A continuous and I've had them on breakers as low as 15A without an issue. With the price of wire what it is, I'd wire these with 12/2.

Some units are 120v, so you really need to pick your unit first... A 120V 15k unit might require 10ga wire.

 

[Shovelhead]

Find the unit to answer this question. I've got 15k Daikin units, they are 240V (no neutral). They pull under 12A continuous and I've had them on breakers as low as 15A without an issue. With the price of wire what it is, I'd wire these with 12/2.

Some units are 120v, so you really need to pick your unit first... A 120V 15k unit might require 10ga wire.

Sound advice neighbor. I been thinking the same thing.
Deal is, I have the wire. I bought 500' spools a year ago of #10 and #12. I'll be using the #12 on other pulls across the shop.
If I'd a only bought the other 3 jillion things I been buying for this shop and property a year or two ago I'd be in a much better humor.

Like an 18" x 30' culvert that was $303 last Fall. two weeks ago I paid 600 bucks. This **** is rapidly draining my retirement funds.

 

[Norcal]

The only sensible way to know what is required for any equipment is to choose and read the specs for it, then wire accordingly any other course of action is pure stupidity and wasting money.

 

[dcg9381]

Sound advice neighbor. I been thinking the same thing.
Deal is, I have the wire. I bought 500' spools a year ago of #10 and #12. I'll be using the #12 on other pulls across the shop.
If I'd a only bought the other 3 jillion things I been buying for this shop and property a year or two ago I'd be in a much better humor.

Like an 18" x 30' culvert that was $303 last Fall. two weeks ago I paid 600 bucks. This **** is rapidly draining my retirement funds.

Yea, I know.. My spouse was asking me "why do you keep all that wire?"
Saved me at least $700 in the last 9 months...