ScaldedDog
Well-known member
I need an outlet for an EVSE in our garage. It needs to pass inspection, and I'd like to future proof a bit by running 4g wire to support 48a charging in the future. (The soon-to-ours PHEV in question only supports 16a charging, but I'll be using a JuiceBox 40a charger, so both the breaker and receptacle will be 50a, for now.) I'd like your knowledgeable opinions on what I'm thinking, and also have some questions at the end of this post.
The panel below is on an inside wall of the utility room, about 4' from the internal garage wall, and about 32' from the external garage wall where the 14-50r receptacle will be (also pictured below. The disconnect is on the outside of the house, and I'll be disconnecting it when working near or in the box. I'll be using the 50a breaker toward the bottom right. It is currently wired to a "spare" circuit that just terminates in a box in the crawl space.
The garage wall where the 14-50 receptacle will be, and where the JuiceBox will be mounted
My plan is to bring 4g Romex down from the attic through the (presumably uninsulated) interior wall and through one of the unused pop-outs in the box. The wire will run across the insulated garage attic and down into the insulated exterior garage wall shown above. I'll be taking down the hose reel and drywall, as the latter is easy to replace in that space.
My questions:
1) Can I just wire nut and label the existing spare circuit wires, and leave them in the box?
2) Are there any code restrictions for how the wire is run from the attic to the top of the box? (e.g. Must be attached to something, etc.) I don't have access to this space, and don't want to tear up that wall. Of course the wire will pass through a connector into the box, but I don't know if it needs to be somehow secured inside the wall.
3) Does the Romex have to be secured to the rafters as it passes along the attic "floor", and beneath the blown in insulation?
4) Does the fact that it will be beneath insulation in the attic, and in an insulated wall as it runs down to the outlet, in any way de-rate the wire? IOW, is 4g Romex still capable of supporting a 60a circuit in a code compliant way?
5) If I can't come down inside the garage wall, and have to use conduit along the outside (inside the garage space) of it, can 4g Romex be used in conduit? I've seen conflicting info and opinions on that. If the code-supported answer is "No", I assume I could terminate the Romex in a jbox in the attic, and run THHN down the conduit. Is that correct?
6) What should I have asked, that I have not?
Thanks!!
Mark
The panel below is on an inside wall of the utility room, about 4' from the internal garage wall, and about 32' from the external garage wall where the 14-50r receptacle will be (also pictured below. The disconnect is on the outside of the house, and I'll be disconnecting it when working near or in the box. I'll be using the 50a breaker toward the bottom right. It is currently wired to a "spare" circuit that just terminates in a box in the crawl space.
The garage wall where the 14-50 receptacle will be, and where the JuiceBox will be mounted
My plan is to bring 4g Romex down from the attic through the (presumably uninsulated) interior wall and through one of the unused pop-outs in the box. The wire will run across the insulated garage attic and down into the insulated exterior garage wall shown above. I'll be taking down the hose reel and drywall, as the latter is easy to replace in that space.
My questions:
1) Can I just wire nut and label the existing spare circuit wires, and leave them in the box?
2) Are there any code restrictions for how the wire is run from the attic to the top of the box? (e.g. Must be attached to something, etc.) I don't have access to this space, and don't want to tear up that wall. Of course the wire will pass through a connector into the box, but I don't know if it needs to be somehow secured inside the wall.
3) Does the Romex have to be secured to the rafters as it passes along the attic "floor", and beneath the blown in insulation?
4) Does the fact that it will be beneath insulation in the attic, and in an insulated wall as it runs down to the outlet, in any way de-rate the wire? IOW, is 4g Romex still capable of supporting a 60a circuit in a code compliant way?
5) If I can't come down inside the garage wall, and have to use conduit along the outside (inside the garage space) of it, can 4g Romex be used in conduit? I've seen conflicting info and opinions on that. If the code-supported answer is "No", I assume I could terminate the Romex in a jbox in the attic, and run THHN down the conduit. Is that correct?
6) What should I have asked, that I have not?
Thanks!!
Mark
), etc.
