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 Sub - Panel
#218292
03/12/17 11:27 PM
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Joined: Jan 2017
Posts: 2
OP
New Member
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Can 6/3 Romex be used for a 60 amp sub panel ?
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Re: Sub - Panel
[Re: Boobear]
#218293
03/13/17 10:02 AM
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Joined: Apr 2002
Posts: 7,225
Member
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With 60 amp OCP at the source of the feeder, yes. As long as it is in a location that is OK for NM, and not subject to physical damage.
However, your profile indicates you are in NY, so I suggest you check if there are any local issues with NM.
John
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Re: Sub - Panel
[Re: Boobear]
#218294
03/13/17 01:20 PM
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Joined: Jul 2004
Posts: 9,556
Member
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Doesn't this limit you to 55 amps? 334.80 Ampacity. The ampacity of Types NM, NMC, and
NMS cable shall be determined in accordance with 310.15.
The allowable ampacity shall not exceed that of a 60°C
2014 Edition NATIONAL ELECTRICAL CODE
(140°F) rated conductor. The 90°C (194 OF) rating shall be
permitted to be used for ampacity adjustment and correction
calculations, provided the final derated ampacity does not exceed
that of a 60°C (140°F) rated conductor.
Greg Fretwell
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Re: Sub - Panel
[Re: Boobear]
#218295
03/13/17 04:45 PM
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Joined: Apr 2002
Posts: 7,225
Member
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Yes, Greg.
However, there is no 55 amp CB or fuses, which allows the next higher amperage.
John
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Re: Sub - Panel
[Re: Boobear]
#218296
03/13/17 05:02 PM
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Joined: Jul 2004
Posts: 9,556
Member
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OK cool. I knew there was a loophole, I just had a senior moment. I guess I shouldn't answer questions until I get my second cup of coffee.
Greg Fretwell
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Re: Sub - Panel
[Re: Boobear]
#218297
03/13/17 05:31 PM
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Joined: Apr 2002
Posts: 7,225
Member
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Senior moments are quite common with me also.
Coffee (2nd cup) by 9:00AM the latest.
PS: Just went thru the math at a burnout. 10 sets of 500KCMil Cu, no longer equates to 4000 amps. Yes, it was an old service, however, now it will be 10 sets of 600KCMil Cu. Hopefully, they can pull out the old. With a major snow event Tuesday, my Twp is closed, and may close Wed also.
John
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Re: Sub - Panel
[Re: Boobear]
#218298
03/14/17 04:36 PM
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Joined: Dec 2002
Posts: 204
Member
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Your weather has made the national news here in UK. How are you getting on with it?
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Re: Sub - Panel
[Re: Boobear]
#218299
03/14/17 05:12 PM
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Joined: Apr 2002
Posts: 7,225
Member
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Here in NJ, where I am (coastal) it has been heavy rain, and gusty winds from around midnight to 300PM. Where I work, 50 miles to the north, there was/is 12+ inches of snow, and wind.
Further north, into real north Jersey I hear 18-24" snow.
All in all, my snow blower sits in the garage, only used once sp far this year.
John
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Re: Sub - Panel
[Re: Boobear]
#218308
03/15/17 04:21 AM
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Joined: Jul 2004
Posts: 9,556
Member
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Brrr
Your cold front got down here too but it translated into 1/4" of rain in about 15 minutes and then it cooled down a little. (70 day, 50 night)
Greg Fretwell
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Re: Sub - Panel
[Re: Boobear]
#218309
03/15/17 02:23 PM
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Joined: Apr 2002
Posts: 7,225
Member
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"Cold Front" at 70 day and 40 night. LOL
It was 17 when I left this AM, and 19 when I got up here to work. Five of us spent 1-1/2 Hrs hacking the ice/snow off of the Twp vehicles. About 12-14" on the ground here in Edison.
John
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