I am about to install a Gen 3 wall charger in my garage. The charger will be about 6 ft from the main panel.
For aesthetic reasons, I am trying to avoid using external conduit and go through the studs in the wall instead. I would like the wires to come directly from the wall into the HPWC enclosure using the openings in the back of the charger (the ones that you have to drill out), not the openings at the top or bottom of the enclosure. It appears that I have two choices:
1) Using 4-3 romex cable from Home Depot. This is pricey at about $12 a foot and I am not sure I will be able to route the #4 wires inside the HPWC. The wires have to make a sharp 90 degree turn when they enter the enclosure, and those #4 wires do not bend very easily. Has anyone had luck routing 4-3 romex when using the back opening of the HPWC?
2) The other choice is to use 3/4" flexible conduit with 2 #6 THHN wires and a #10 ground wire. The problem is that the conduit also has to make a 90 degree turn when it exits the stud and comes out of the wall. My understanding is that NEC requires a minimum bending radius of 4-6 inches for various types of 3/4" conduit. Since there is only 5.5" of depth inside the walls (assuming 6x2 studs), and the conduit will be routed through the center of the studs, making that ~5" 90 degree bend into the back opening of the HPWC doesn't appear to be possible. If you managed to successfully connect flexible conduit in this way, how did you do it and which type of conduit did you use? It appears that ENT (the blue PVC conduit) is a little more flexible than FMC (the flexible metallic type), so perhaps that's the way to go? Additionally, it looks like 1/2" FMC conduit is barely within the 40% NEC fill requirements for 2 #6 + 1 #10 wires, so maybe going with 1/2" conduit is a possible solution as well?
For aesthetic reasons, I am trying to avoid using external conduit and go through the studs in the wall instead. I would like the wires to come directly from the wall into the HPWC enclosure using the openings in the back of the charger (the ones that you have to drill out), not the openings at the top or bottom of the enclosure. It appears that I have two choices:
1) Using 4-3 romex cable from Home Depot. This is pricey at about $12 a foot and I am not sure I will be able to route the #4 wires inside the HPWC. The wires have to make a sharp 90 degree turn when they enter the enclosure, and those #4 wires do not bend very easily. Has anyone had luck routing 4-3 romex when using the back opening of the HPWC?
2) The other choice is to use 3/4" flexible conduit with 2 #6 THHN wires and a #10 ground wire. The problem is that the conduit also has to make a 90 degree turn when it exits the stud and comes out of the wall. My understanding is that NEC requires a minimum bending radius of 4-6 inches for various types of 3/4" conduit. Since there is only 5.5" of depth inside the walls (assuming 6x2 studs), and the conduit will be routed through the center of the studs, making that ~5" 90 degree bend into the back opening of the HPWC doesn't appear to be possible. If you managed to successfully connect flexible conduit in this way, how did you do it and which type of conduit did you use? It appears that ENT (the blue PVC conduit) is a little more flexible than FMC (the flexible metallic type), so perhaps that's the way to go? Additionally, it looks like 1/2" FMC conduit is barely within the 40% NEC fill requirements for 2 #6 + 1 #10 wires, so maybe going with 1/2" conduit is a possible solution as well?