Subpanel Wire Size.

mics_54 · 11-12-2009, 04:42 PM

For a 100 amp sub panel 60 feet from the main what size wire do I need?
For a 50 amp same distance what size wire?
It's not actually mine...I was talking to some one that was going to install a 50 amp with 6/3 I thought that was small for 60 feet.

Magnettica · 11-12-2009, 05:09 PM

Since 6/3 is an NM sheathed cable it's good for 55 amps but you cannot install it inside any sort of conduit so forget that idea. What you need is obviously conduit and minimum #3 THWN for 100 amps. Disconnect and ground rods at the detached garage.

mics_54 · 11-12-2009, 05:14 PM

Thanks mag...I think this guys garage is attached so I don't know if he was talking about buriable wire or routing wire through the building or what. Thanks for answering. (I know I know I'm a doof for not mentioning that to begin with)

11-12-2009, 04:42 PM	#1
mics_54 View Profile mics_54 Pro Send Message Follow Blogs (0) Threads (1,062) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Pro Trade: contractor Join Date: Oct 2008 Location: Alaska Posts: 1,062	Subpanel Wire Size. For a 100 amp sub panel 60 feet from the main what size wire do I need? For a 50 amp same distance what size wire? It's not actually mine...I was talking to some one that was going to install a 50 amp with 6/3 I thought that was small for 60 feet.

11-12-2009, 05:09 PM	#2
Magnettica View Profile Magnettica Service & Repairs Send Message Follow Blogs (0) Threads (3,998) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Service & Repairs Trade: Electrician Join Date: Dec 2006 Location: Rahway, New Jersey Posts: 3,998	Re: Subpanel Wire Size. Since 6/3 is an NM sheathed cable it's good for 55 amps but you cannot install it inside any sort of conduit so forget that idea. What you need is obviously conduit and minimum #3 THWN for 100 amps. Disconnect and ground rods at the detached garage. __________________ Electrician service in Rahway, Cranford, Clark, Westfield, Mountainside, Scotch Plains, Fanwood, Roselle, Roselle Park, and New Jersey \| Same day electrical service and repairs \| Licensed and Insured Electrician in Rahway

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Subpanel Wire Size.

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11-12-2009, 05:14 PM	#3
mics_54 View Profile mics_54 Pro Send Message Follow Blogs (0) Threads (1,062) Photos (0) Reviews (0) Projects (0) Toolbox (0) View All Activity Pro Trade: contractor Join Date: Oct 2008 Location: Alaska Posts: 1,062	Re: Subpanel Wire Size. Thanks mag...I think this guys garage is attached so I don't know if he was talking about buriable wire or routing wire through the building or what. Thanks for answering. (I know I know I'm a doof for not mentioning that to begin with) Last edited by mics_54; 11-12-2009 at 05:22 PM.