wwhitney
Posts: 711
Joined: Sat Jul 17, 2010 10:10 am
Delivery Date: 01 Apr 2011
Location: Berkeley, CA

Re: Best EVSE/charging solution for my situation?

Sun Dec 31, 2017 6:48 pm

jake14mw wrote:What size PVC conduit for the 6-3 wire?

PVC conduit is only required if the NM cable is exposed to damage or for aesthetics. If the PVC is just a sleeve, then any size it will fit in will work. You'll still need to clamp the cable to the destination enclosure.

If the PVC conduit is complete from box to box, you'd need to use at least 1" PVC. But you'd be better off pulling individual wires.

Cheers, Wayne

MikeD
Posts: 606
Joined: Thu Jun 24, 2010 6:14 am
Delivery Date: 12 May 2011
Leaf Number: 592

Re: Best EVSE/charging solution for my situation?

Sun Dec 31, 2017 7:36 pm

wwhitney: Isn't there an argument to be made for using cable rather than individual wires from the standpoint that a cable of 3 or 4 wires is much less likely to be damaged when pulling thru a conduit, especially less likely to be bent at an acute angle at some point and/or stretched and thereby reducing the wire's cross-section at that point? So at the very least a non-experienced installer needs to be more careful using individual wires?

wwhitney
Posts: 711
Joined: Sat Jul 17, 2010 10:10 am
Delivery Date: 01 Apr 2011
Location: Berkeley, CA

Re: Best EVSE/charging solution for my situation?

Sun Dec 31, 2017 8:38 pm

No, I think pulling a cable would be harder, the overall jacket on the cable will restrict the motion of the component conductors. The increased pulling force would be more likely to damage the conductors, although I'm not sure that there would be much chance of damage either way. Nobody pulls cables through conduit, except short sleeves or short distances to avoid having to do a splice.

Cheers, Wayne

jake14mw
Posts: 130
Joined: Sun Nov 12, 2017 9:53 pm
Delivery Date: 13 Nov 2017
Location: Connecticut, USA

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 6:48 am

The Romex runs 60 ft through the basement. The conduit is only being used in the garage because I am running on the surface of the wall. Total run is 30 ft with 3 90 degree bends. Thanks.

MikeD
Posts: 606
Joined: Thu Jun 24, 2010 6:14 am
Delivery Date: 12 May 2011
Leaf Number: 592

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 1:05 pm

I believe code backs up the "common sense" notion that if a vehicle could possibly crush a cable/wiring along a solid wall then that cable/wiring should be protected by thick metal conduit and not PVC. In my case the Blink installers (electricians) ran a NM 8-2 cable from the breaker panel along the floor joists in the basement ceiling and only used a protective metal conduit for 4 feet down the cinder block wall to the direct wired EVSE.

smkettner
Posts: 7077
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 1:27 pm

Consider using armored cable for a few extra $$
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV

wwhitney
Posts: 711
Joined: Sat Jul 17, 2010 10:10 am
Delivery Date: 01 Apr 2011
Location: Berkeley, CA

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 1:40 pm

MikeD wrote:I believe code backs up the "common sense" notion that if a vehicle could possibly crush a cable/wiring along a solid wall then that cable/wiring should be protected by thick metal conduit and not PVC.

Nope. It does specify that if you are installing PVC conduit to protect cable from damage, it should be schedule 80 PVC (2011 334.15(B)). But I don't think any wiring method is going to be adequate for a direct vehicle strike; that is a good reason to run the cable higher up the wall.

If I were trying to be as quick and cheap as possible and didn't care about aesthetics (i.e. not actually me), I'd run the NM cable at the wall/ceiling corner. Any part of the cable under 7' above the floor would be protected with Schedule 80 PVC.

Cheers, Wayne

wwhitney
Posts: 711
Joined: Sat Jul 17, 2010 10:10 am
Delivery Date: 01 Apr 2011
Location: Berkeley, CA

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 1:45 pm

smkettner wrote:Consider using armored cable for a few extra $$

Code-wise that wouldn't be of any benefit--types NM, MC, and AC cable are all prohibited where subject to physical damage.

Cheers, Wayne

smkettner
Posts: 7077
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 4:01 pm

wwhitney wrote:
smkettner wrote:Consider using armored cable for a few extra $$

Code-wise that wouldn't be of any benefit--types NM, MC, and AC cable are all prohibited where subject to physical damage.

Cheers, Wayne
So my electrician should not have run this stuff in my garage???

Image

https://www.homedepot.com/b/Electrical-Wire-Armored-Cable/6/N-5yc1vZc57mZ1z10myq

What on earth is the purpose?
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV

LeftieBiker
Posts: 8385
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Best EVSE/charging solution for my situation?

Mon Jan 01, 2018 4:12 pm

The main purpose of BX-type cable is to protect people where they may brush against it, as in cellars or garages.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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