Timeline for What current capacity does 6 AWG AL TYPE SE have for an EV charger?
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 16, 2023 at 2:47 | comment | added | manassehkatz-Moving 2 Codidact | @Sam As far as "Do NOT use a receptacle", there are a bunch of reasons. The biggest (as I know from my electrician telling me stuff (I don't have an EV but he has installed for others) is that newest code requires GFCI for most 240V double-breakers except that hardwired EVSE is exempt because it has internal GFCI. That double-breaker GFCI has both a significant $ cost and can be hard to get (as my electrician can tell you). In addition, using plug/receptacle connection for permanent equipment adds an additional point of possible failure, which is a big deal with high-current connections. | |
| Feb 16, 2023 at 2:44 | comment | added | manassehkatz-Moving 2 Codidact | @Sam Not assuming Tesla. But (a) Tesla is the top-selling brand in the US and the Tesla Wall Connector is the logical choice for a Tesla owner so it is the most likely possibility and (b) I know definitively (Tesla Wall Connector manual and "Harper says so") that the Tesla has the "can't take aluminum wires" problem so I use that as an example. If OP's EVSE can handle aluminum then that part can be ignored. | |
| Feb 16, 2023 at 2:29 | comment | added | Sam | why do you assume Tesla? | |
| Feb 16, 2023 at 2:29 | comment | added | Sam | "Do NOT use a receptacle. That is crazy in general and especially at higher charge rates. Use a Tesla Wall Connector or similar device hardwired." why? | |
| Feb 15, 2023 at 22:37 | comment | added | manassehkatz-Moving 2 Codidact | That's my point. Disconnect box normally has everything needed for two hots and ground. If you just used a junction box you'd need Polaris or similar for hots and either another Polaris for ground or add lugs for ground as the standard green screw won't do the trick. | |
| Feb 15, 2023 at 22:32 | comment | added | KMJ | @manassehkatz-Moving2Codidact you can tie ground to the disconnect box with an Al lug then tie a copper ground for the EVSE to the box, no polaris connector needed. The parts are a lot cheaper too. | |
| Feb 15, 2023 at 22:26 | comment | added | manassehkatz-Moving 2 Codidact | @kmj need ground unless metal conduit | |
| Feb 15, 2023 at 22:25 | comment | added | KMJ | And you won't need a third one if you hardwire and thus ignore the neutral. J1772 doesn't have a neutral anyway. | |
| Feb 15, 2023 at 21:32 | comment | added | Harper - Reinstate Monica | @KMJ I agree it's not required statutorially for an EVSE <=60A. I also agree you aren't going to buy three Polaris connectors and an enclosure for under $20. | |
| Feb 15, 2023 at 16:57 | comment | added | manassehkatz-Moving 2 Codidact | @KMJ At ~ $20 it can't be beat. | |
| Feb 15, 2023 at 16:22 | comment | added | KMJ | Disconnect is a great spot to do the Al-Cu transition but is likely not required by local code, and certainly not by national code unless they're in a very weird situation. | |
| Feb 15, 2023 at 16:18 | comment | added | manassehkatz-Moving 2 Codidact | When I looked a while back it seemed like they did not and expected you to wire nut or Polaris | |
| Feb 15, 2023 at 16:08 | comment | added | keshlam | Are there not 240v disconnects which pass neutral through? If so it still should have a terminal on each side, hopefully as compatible with AL as the ones going to the contacts...? | |
| Feb 15, 2023 at 15:59 | comment | added | manassehkatz-Moving 2 Codidact | @keshlam catch is that it is easy and inexpensive for two hots but not if you also have neutral | |
| Feb 15, 2023 at 15:45 | comment | added | keshlam | Disconnect as adapter is a good trick to keep in mind generally. Tnx! | |
| Feb 15, 2023 at 15:37 | comment | added | FreeMan | Even if local code doesn't require it, the local disconnect makes a handy place to transition from Al to Cu wiring and is probably cheaper than a single (3 needed) Mac Block or Polaris connector of the appropriate type. | |
| Feb 15, 2023 at 15:03 | vote | accept | user163047 | ||
| Feb 15, 2023 at 14:42 | history | answered | manassehkatz-Moving 2 Codidact | CC BY-SA 4.0 |