NMB Cable In Surface Mounted Conduit In Finished Garage

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Ravenvalor

Ravenvalor

Senior Member
Location
Piedmont region of NC
Hello,
I would like to install a NEMA 14-50 receptacle about 10' from a panel in a finished garage. Would it be ok to use romex in carflex on the surface of the sheetrock or would UF be called for. I prefer the cable option so that I can fish it in the wall when entering the panel. I would guess that romex is ok inside the wall but UF is required once you leave the interior of the wall. I could always use #6 THWN in 3/4" conduit to fish in the wall to the panel but romex is usually simpler.
Also, this outlet is for a customer's Tesla. Would he be better off if the breaker was a GFCI?
Thanks for all the great advice.
 
No gfci is required unless you are under the 2020 nec. I don't think you will have an issue sleeving nm in carflex.
 
Ravenvalor said:
Thanks for all of the help. I am having the customer check with Tesla for approval of a GFCI. They make among other things nice lightning arrestors sometimes.
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They better approve it, cause it will be required once 2020 code kicks in whether new requirement is truly justified or not - it is there.
 
I have called Tesla in the past and there response was GFI protection was incorporated within the unit.

Jim
 
Ravenvalor said:
What is the difference? Thanks...
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The unit may have GFPE not GFCI. GFPE is ground fault protection for the equiment which is at 30 ma while gfci is ground fault protection for individuals at 4-6ma

I don't think there is a difference between gfci and gfi.... just a shorter way to say it.
 
2020 NEC requires GFCI protection of the 14-50 receptacle regardless of whether there is GFCI in the equipment supplied or not. Location based requirement with locations mostly same as 15/20 amp 120 volt receptacles have been in recent years, garage is in the list.
 
Dennis Alwon said:
The unit may have GFPE not GFCI. GFPE is ground fault protection for the equiment which is at 30 ma while gfci is ground fault protection for individuals at 4-6ma

I don't think there is a difference between gfci and gfi.... just a shorter way to say it.
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30 ma vs 4-6 ma. That's good to know. Thanks.

Although it is not code yet here in NC the customer opted to put the 14-50 receptacle in his garage on a GFCI breaker.
 
Ravenvalor said:
Would it be ok to use romex in carflex on the surface of the sheetrock or would UF be called for. I prefer the cable option so that I can fish it in the wall when entering the panel.
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We have been doing allot of chargers lately, I noticed the wide box adapters for carflex don't play nice 'fishing' into a panel, I have switched to metal flex with a 'screw in type connector' when a kick 90 and EMT wont work.

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This way you can pull #8 THHN in the flex and go with a 50A breaker and a 10 THHN stranded ECG. Nice easy pull compared to romex in carflex.
Cheers
 
tortuga said:
We have been doing allot of chargers lately, I noticed the wide box adapters for carflex don't play nice 'fishing' into a panel, I have switched to metal flex with a 'screw in type connector' when a kick 90 and EMT wont work.

View attachment 2551471



This way you can pull #8 THHN in the flex and go with a 50A breaker and a 10 THHN stranded ECG. Nice easy pull compared to romex in carflex.
Cheers
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There are similar designed adapters for non metallic flex.

I will say that FMC probably still fishes easier then NMLT flex
 
kwired said:
There are similar designed adapters for non metallic flex.

I will say that FMC probably still fishes easier then NMLT flex
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Thanks for both of those options K & T. Of both of the choices that you two have given me I think that I would choose the NMLT first. I like how fast it cuts and I like having the option of using either indoors or outdoors.
 
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