Romex is not intended to be run inside of a conduit. I would use individual THHN conductors, not the romex they have featured in this video. Pretty sure most EV chargers (if not all) state they require 90C conductors while romex is only rated at 60C. Remember an EV charger is a continuous load, the conductors will heat up if you’re charging anywhere near the capacity of your 240V circuit.

 

I think you can run it in conduit, but in this situation, it may in fact not be the best idea. That's all drywall, and that type of Romex IS better, I agree, in used directly behind the drywall. Just eat the drywall repair and be done with it. In any event, he should have used a larger conduit for that wire. There IS a maximum fill requirement for cable to conduit ratios, and from I understand he'd be under that. Made his installation a hell of a lot harder than it needed to be. Or make it easier on yourself and just pull single strand 6 guage wire.

Personally, never been a fan of using metal conduits for high-power electrical applications. Especially when PVC is readily available and has better impact resistance, etc. and is waterproof since the seams are glued.

 

I was at home depot and I was gonna do that (romex inside conduit), but some guy approached and asked what I was going to do and he explained to me that romex inside conduit is not allowed and should be using THHN, so thats what I did. The THHN wires are a lil cheaper and are slippery so easier to run in the conduit.

 

It's not as black and white as that. NM cable (generic name for Romex) can be run in conduits under certain circumstances. There are 3 primary rules:

1. NM cable must be in conduit when the wire must be protected from physical damage.
2. NM cable cannot be run underground or other wet locations.
3. NM cable has different conduit fill size rules. In general the conduit is wider than when using separate THHN wiring.

NM cable not being able to be run in conduit is an old wives tale. The NEC specifically addresses how and when to wire NM cable in conduit.

Here's an article on the subject:

Is it OK to run Romex in conduit?

ga2500ev

 

For my installation, I have a short section underground and then and above-ground transition to the garage. This is all in conduit.

I already had a sufficient length of UF-B (basically underground Romex – Romex is just a product name from Southwire) on hand.

So against my better judgement, but acceptable per code, I pulled the UF-B through conduit. No fun.

It's inadvisable mainly because it's an unnecessary chore. Single, unjacketed wires are so much easier to pull, even all together, than one monolithic bundled snake – especially if making a turns through LB boxes.

UF-B has a 90° rating, and I supposed it's double protected inside conduit (against what, I don't know!).

 

Like trying to pull a 2x4 through a sewer drain. LOL. I hear ya.

It's inadvisable mainly because it's an unnecessary chore. Single, unjacketed wires are so much easier to pull, even all together, than one monolithic bundled snake – especially if making a turns through LB boxes.