• Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by first logging in then clicking here: Upgrades

Barn Wiring

wesleywitt

Registered User
Joined
May 7, 2022
Messages
4
Location
Greenacres, WA
I'm building a pole barn and will be wiring the building. I plan on using EMT to run all the wires, but I have a question about the electrical boxes that I use. I had a brief conversation with the inspector and he said I need to use weatherproof compression fittings for all EMT connections, all luminaries need to be rated for wet conditions, and that I should use weatherproof boxes. Do I really need to use the plastic weatherproof boxes? I don't want to use these because they're a lot more expensive and the covers are very inconvenient to use. I'd like to just use regular metal boxes. I'm in WA state. Can anyone advise?
 

ICE

Moderator
Joined
Jun 23, 2011
Messages
10,277
Location
Ca. concrete jungle
If the outlet boxes are in a wet location they shall be listed for a wet location. Inside an enclosed pole barn would not be a wet location.
 
Last edited:

bill1952

Sawhorse
Joined
Aug 12, 2021
Messages
680
Location
Clayton NY
What is the pole barn for? Are you washing cars in it? Milking parlour with regular wash downs? I think you need to ask your inspector why he considers it a wet location.
 

wesleywitt

Registered User
Joined
May 7, 2022
Messages
4
Location
Greenacres, WA
thanks. the barn is for horses. there will be 3 stalls for horses. there will be a wash stall for the horses, an enclosed tack room and a small bathroom. both ends of the barn isle will have sliding barn doors to close it off. the only place that is always open to the air are the 3 horse stalls. but they are covered on all sides and on the open side there is a 12 foot lean to so there is no possibility of a wet environment -- just an increased humidity and temperature.
 

ICE

Moderator
Joined
Jun 23, 2011
Messages
10,277
Location
Ca. concrete jungle
Wiring in an barn that houses livestock has specific requirements beyond what a DIY project should encompass.
 

bill1952

Sawhorse
Joined
Aug 12, 2021
Messages
680
Location
Clayton NY
There's a separate section of NEC for buildings with livestock and I'm not familiar with it but guessing your inspector is correct. While not the easiest reader, it is available at NFPA web site.

Big believer in diy anything.
 

bill1952

Sawhorse
Joined
Aug 12, 2021
Messages
680
Location
Clayton NY
And explosive vapors - ay caramba! Maybe all PVC conduit but I would have to look to see if glued PVC joints are vapor proof.
 

Msradell

Sawhorse
Joined
Jul 23, 2011
Messages
1,038
Location
Louisville Kentucky
Wiring in an barn that houses livestock has specific requirements beyond what a DIY project should encompass.
And your reasoning for this is? Unless local codes require it there's no reason a person can't DIY this or any other structure assuming they follow the code requirements
 

ICE

Moderator
Joined
Jun 23, 2011
Messages
10,277
Location
Ca. concrete jungle
And your reasoning for this is? Unless local codes require it there's no reason a person can't DIY this or any other structure assuming they follow the code requirements
Yourself and bill1952 are absolutely correct. I’m not a horse that would be housed in the barn …. I don’t even know any of Wesley’s horses. Come to think of it, there’s an inspector involved so what could go wrong? Let me trot it back and wish him well.
 
Last edited:

jj1289

Sawhorse
Joined
Oct 22, 2009
Messages
112
Location
Connecticut
EMT is not one of the permitted wiring systems in 547.5(A). If you switch to PVC conduit you will need to take into account the expansion of this material for the environment.

I have a small barn that is wired with UF cable and sealed outlets.
 

ADAguy

Registered User
Joined
Sep 11, 2013
Messages
6,209
Location
California
again a good discussion gang and a warning to DIYrs, proceed with caution. Saving a few dollars is not worth the potential loss you might incur.
 
Top