Terminating 8/2 MC in plastic EV charger enclosure

jjhoward

jjhoward

Senior Member
Location
Northern NJ
Occupation
Owner TJ Electric
Hello All;
Can I terminate a run of 8/2 MC into a plastic EV charger enclosure? The charger is a ChargePoint Home Flex for Volvo. This particular one has a NEMA 14-50P on it that can be removed (that is our plan). Should I use a bonding bushing on the inside of the housing and bond the MC jacket to the ground in the charger?

Thank you.

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If it's bonded at one end then you're good but if it was up to me I'd use an AC disconnect next to it and hit that with the mc and then thhn to the charger.
1. No need to use a breaker lock
2. Makes it easier to service in the future
3. Sell it as a safety disconnect and people like it
4. The KO in those chargers are so jambed in and the plastic so thick alot of connector don't have much bite on the locknut.
 
letgomywago said:
If it's bonded at one end then you're good but if it was up to me I'd use an AC disconnect next to it and hit that with the mc and then thhn to the charger.
1. No need to use a breaker lock
2. Makes it easier to service in the future
3. Sell it as a safety disconnect and people like it
4. The KO in those chargers are so jambed in and the plastic so thick alot of connector don't have much bite on the locknut.
Click to expand...


breaker lock?
 
letgomywago said:
Hard wired is hardwired. Cord and plug is a disconnect means. It's just like a dishwasher on a 15a breaker hardwired needs a breaker lock.
Click to expand...
Yep. Just got flagged on an inspection for hard wiring a 4 amp range hood.

Conditions didn’t allow for a cord or a wall switch.

Most I do are cord and plug, never even thought about it.
 
letgomywago said:
If it's bonded at one end then you're good but if it was up to me I'd use an AC disconnect next to it and hit that with the mc and then thhn to the charger.
Click to expand...
Even if you feel it is not necessary to bond the sheathing of the MC the connectors is still required to be bonded. Unless the sheathing is a type listed for an EGC it will not bond the fitting.
 
letgomywago said:
Ok what does LNI think it comes down to them and Seatle in the end?
Click to expand...
I have done maybe 6 in Seattle with a permit, and never installed a lockout. A few of those were in sight, but I don't think it's required. To me that would be the same thing as picking sections out of article 422 for a transformer install. I don't see an EVSE being any more of appliance than a transformer is.
 
Here's the inside of a Chargepoint home flex. There's plenty of room to secure incoming cables.
IMG_6860.jpg
(Image from the Internet, yes I see the neutral / green confusion).

A clip termination is unlikely to work out well with the plastic.
But a threaded 8/2 MC one should be fine, it's designed for just that.
Cable armor is not a raceway. Bond it at the panel, you've got a continuous ground right in the 8/2 MC.

There are several tradeoffs with a disconnect switch, and several sets of extra connectors to get right
and tight, and create heat. All that for marginal utility for single family. And negative utility for multifamily
garages. Leaving a set of breaker lockout devices in the main panel though: that's cool. Not just for EVs.

Bonding both ends of metallic armor sheath GEC

NEC code requires that if metal conduit / protective cover is used on the grounding electrode conductor especially whether it is 6 AWG but exposed to physical damage, then the conduit / metal sheathing must be bonded at both ends to the grounding electrode conductor. Since the armor cable...
forums.mikeholt.com

A more detailed image below:
CP Home Flex Detail.jpg
 
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