ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Chinese wire symbols?
by Texas_Ranger. 05/19/19 03:09 PM
Pool - Daisy chained GFCI
by gfretwell. 05/18/19 01:30 PM
110.26 working clearances
by HotLine1. 05/14/19 02:08 PM
Parallel SER Cables
by George Little. 05/03/19 05:42 PM
Norwegian power?
by dsk. 05/03/19 04:30 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 13 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
250.30(B) 3 & 250.30 (C) #213394
04/21/14 03:40 PM
04/21/14 03:40 PM
Y
Yoopersup  Offline OP
Member
Joined: Mar 2003
Posts: 849
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
Re: 250.30(B) 3 & 250.30 (C) [Re: Yoopersup] #213418
04/25/14 02:39 PM
04/25/14 02:39 PM
Y
Yoopersup  Offline OP
Member
Joined: Mar 2003
Posts: 849
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



Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
255,027 Are you busy
191,160 Re: Forum
180,914 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.015s Queries: 15 (0.004s) Memory: 0.9426 MB (Peak: 1.0609 MB) Zlib enabled. Server Time: 2019-05-20 17:39:59 UTC