ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 274 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#218292 03/13/17 12:27 AM
Joined: Jan 2017
Posts: 2
B
Boobear Offline OP
New Member
Can 6/3 Romex be used for a 60 amp sub panel ?

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

Boobear #218293 03/13/17 11:02 AM
Joined: Apr 2002
Posts: 7,381
Likes: 7
Member
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
Boobear #218294 03/13/17 02:20 PM
Joined: Jul 2004
Posts: 9,923
Likes: 32
G
Member
Doesn't this limit you to 55 amps?


Quote
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
Boobear #218295 03/13/17 05:45 PM
Joined: Apr 2002
Posts: 7,381
Likes: 7
Member
Yes, Greg.
However, there is no 55 amp CB or fuses, which allows the next higher amperage.


John
Boobear #218296 03/13/17 06:02 PM
Joined: Jul 2004
Posts: 9,923
Likes: 32
G
Member
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
Boobear #218297 03/13/17 06:31 PM
Joined: Apr 2002
Posts: 7,381
Likes: 7
Member
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
Boobear #218298 03/14/17 05:36 PM
Joined: Dec 2002
Posts: 206
G
Member
Your weather has made the national news here in UK. How are you getting on with it?

Boobear #218299 03/14/17 06:12 PM
Joined: Apr 2002
Posts: 7,381
Likes: 7
Member
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
Boobear #218308 03/15/17 05:21 AM
Joined: Jul 2004
Posts: 9,923
Likes: 32
G
Member
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
Boobear #218309 03/15/17 03:23 PM
Joined: Apr 2002
Posts: 7,381
Likes: 7
Member
"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
Page 1 of 2 1 2

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5