Guys, I am drawing my first permit for 8 panels in one string of 2616W total DC Power. On DC side I will use #10 Cu AWG ”USE-2” wire with #6 Cu AWG bare ground to go from the panels to the inverter. I only have a roll on white #10 AWG USE-2 wire. Can use white “USE-2” wire for both positive and negative, or do I need to get different color, or somehow label the wires?
My transformerless string Inverter SMA 3000TL-US will be inside the garage, and it has maximum output current of 15A at 240VAC. Romex 10/2 is good for 30A. My question is if there will be problem with me using Romex 10/2 to connect inverter to AC disconnect that sits on the outside wall of the garage? The Romex 10/2 will be inside garage only.
Since I am using a transformerless inverter, I do not need to ground the inverter using grounding electrode. However, if I use Romex 10/2 in the garage, that means I will have ground conductor mismatch on the DC and AC side - #6 CU AWG bare ground on DC side, and #10 AWG ground that is inside Romex 10/2 on AC side, even though my inverter in transformeless. Is that against the code?
Another question is if I am allowed to use generic Air Conditioner AC disconnect available at Home Depot that costs $13 - AC Disconnect 30 Amp 2-Pole Fusible NEMA 3R
It is “Type Air Conditioner “. Is there any difference between Solar AC disconnect and Air Conditioner AC disconnect?
Thanks,
Tomas
My transformerless string Inverter SMA 3000TL-US will be inside the garage, and it has maximum output current of 15A at 240VAC. Romex 10/2 is good for 30A. My question is if there will be problem with me using Romex 10/2 to connect inverter to AC disconnect that sits on the outside wall of the garage? The Romex 10/2 will be inside garage only.
Since I am using a transformerless inverter, I do not need to ground the inverter using grounding electrode. However, if I use Romex 10/2 in the garage, that means I will have ground conductor mismatch on the DC and AC side - #6 CU AWG bare ground on DC side, and #10 AWG ground that is inside Romex 10/2 on AC side, even though my inverter in transformeless. Is that against the code?
Another question is if I am allowed to use generic Air Conditioner AC disconnect available at Home Depot that costs $13 - AC Disconnect 30 Amp 2-Pole Fusible NEMA 3R
It is “Type Air Conditioner “. Is there any difference between Solar AC disconnect and Air Conditioner AC disconnect?
Thanks,
Tomas
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