ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

>> Home   >> Electrical-Photos   >> Classifieds   >> Subscribe to Newsletter   >> Store  
 

Photos of the Week:

Meter vs Bricklayer
Meter vs Bricklayer

Random Gallery Image:
Recent Gallery Topics:
What in Tarnation?
What in Tarnation?
by timmp, September 10
Plumber meets Electrician
Plumber meets Electrician
by timmp, September 10
Who's Online Now
0 members (), 114 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Dec 2006
Posts: 43
W
Junior Member
Hi,
I have a 480 V switch gear we are going to feed a new maint building from. We are going underground about 50 feet from the MCC to the new building. We wont need a disco for the primary of the transformer but will for the secondary right?

Thanks


We all live under one King
Horizontal Ad
Joined: Nov 2000
Posts: 2,148
R
Member
You will need a disconnect at the building to satisfy 225.31. Transformers do not require disconnects, but they do require over current protection per Article 450. The feeder OCPD will provide the required primary protection. Secondary protection for the transformer many not be required, but in most cases the secondary conductors require protection at or near the transformer per 240.21(C).
Don


Don(resqcapt19)

Link Copied to Clipboard
Advertisement:-Right


Tools for Electricians
Tools for Electricians
 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Top Posters(30 Days)
Admin 3
CSS 1
Popular Topics(Views)
366,399 Are you busy
289,393 Re: Forum
268,041 Need opinion
New Page 2
Powered by UBB.threads™ PHP Forum Software 7.7.5