Must I use "PV" wire for runs inside attic space?

[inowhavesolar]

I need to run wire from panels on roof, about 60ft, through attic space, to unfinished garage to inverter. There's an "attic tunnel" which connects main house to detached garage. Do I have to use #10 "PV wire" through the attic or can I transition in the roof box to standard #10 THHN wire?

 

[Brucey]

I need to run wire from panels on roof, about 60ft, through attic space, to unfinished garage to inverter. There's an "attic tunnel" which connects main house to detached garage. Do I have to use #10 "PV wire" through the attic or can I transition in the roof box to standard #10 THHN wire?

I believe NEC code requires DC inside a dwelling to be contained in metal conduit or equivalent.

 

[inowhavesolar]

to be contained in metal conduit

Sure, but can it be THHN wire inside that conduit or must it be "PV wire"?

 

[Brucey]

Sure, but can it be THHN wire inside that conduit or must it be "PV wire"?

Yes, assuming it's rated for the PV voltage.

 

[Supervstech]

Sure, but can it be THHN wire inside that conduit or must it be "PV wire"?

Zero reason to use PV wire inside conduit or a structure...

 

[Tulex]

Thhn is fine. PV wire is really only needed for exposed wire.

 

[dougbert]

Yes, assuming it's rated for the PV voltage.

Sure, but can it be THHN wire inside that conduit or must it be "PV wire"?

THHN/THHN-2 in EMT, MC, etc just fine

 

[DPC]

I believe NEC code requires DC inside a dwelling to be contained in metal conduit or equivalent.

What is the equivalent?

Can you use Teck or BX? armoured cables?

Just some light reading that talks about Mechanical protection and wiring methods/
I am not personal familiar with the current rules...

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esasafe.com

 

[Brucey]

What is the equivalent?

Can you use Teck or BX? armoured cables?

Just some light reading that talks about Mechanical protection and wiring methods/
I am not personal familiar with the current rules...

Loading…

esasafe.com

Metal clad (MC) is acceptable.

 

[Brucey]

What is the equivalent?

Can you use Teck or BX? armoured cables?

Just some light reading that talks about Mechanical protection and wiring methods/
I am not personal familiar with the current rules...

Loading…

esasafe.com

Looks like Canada is much stricter requiring the PV cables to be secured from risk of physical damage, and a lot about rodent proofing.

 

[HarryN]

I can assure you from personal experience - if a wire can be accessed by a rodent - they will find it and chew through it.

No matter what anyone wants to believe, rodents can and do get literally anywhere and have a passion for chewing through wires.

They also love to chew on roofing materials including tar paper.

 

[DPC]

Looks like Canada is much stricter requiring the PV cables to be secured from risk of physical damage, and a lot about rodent proofing.

View attachment 210978

Ontario rules.
Yes the rodent thing has me wondering

Pyro!
Eat that lol