ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 3
dsk 3
Recent Posts
Feed to spa panel
by HotLine1. 06/25/17 05:28 PM
Weatherhead, POA, height?
by HotLine1. 06/24/17 02:37 PM
Windows 7 update problem
by ampherder. 06/21/17 07:01 AM
Norwegian power?
by dsk. 06/19/17 03:40 PM
Anyone ever take a Furnas A14D drum sw apart?
by gfretwell. 06/17/17 08:14 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
238,245 Are you busy
173,462 Re: Forum
166,264 Need opinion
Who's Online Now
0 registered members (), 59 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#213394 - 04/21/14 03:40 PM 250.30(B) 3 & 250.30 (C)  
Yoopersup  Offline
Member
Joined: Mar 2003
Posts: 822
Michigan
Outdoor transformer Customer owned 13.8 Pri.
480/277 Secondary. Bond at Transformer as Required 250.30 (C)
sized by 250.66. 3 phases from Transformer Plus Ground to ist OCP. Can it be Bare Conductors (Parallel) & Must be sized by 250.66 as it's before OCP.
250.30 (B) 3.
Phase Conductors 6 sets of 750's .
750 x6 = 4500 x 12.5 % =5625.
Grounding conductor must be 600 mcm each conduit.
Your imput ?


2017 / 2014 NEC & Related Books and Study Guides

#213418 - 04/25/14 02:39 PM Re: 250.30(B) 3 & 250.30 (C) [Re: Yoopersup]  
Yoopersup  Offline
Member
Joined: Mar 2003
Posts: 822
Michigan
Questions are incase I didn't state them correctly?
Can a bare SSBJ be installed between the XO at the secondary of the transformer to the Switchgear with the phase conductors?? (there is no Neutral just 3 phases & SSBJ.

Second: system bonding jumper must be sized by 250.66????

Yoopers UP
see above post for details




Member Spotlight
Lostazhell
Lostazhell
Bakersfield, CA (Originally Orange Co.)
Posts: 1,429
Joined: February 2004
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 15 (0.002s) Memory: 0.7431 MB (Peak: 0.8612 MB) Zlib enabled. Server Time: 2017-06-26 22:29:36 UTC