ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Inspection camera help
by Bill Addiss. 09/19/18 10:50 PM
220/230/240V 60Hz Systems
by gfretwell. 09/16/18 12:37 PM
Acronis Backup 2017
by gfretwell. 09/16/18 12:46 AM
Tingle off the water spigot
by Trumpy. 09/15/18 03:24 AM
Lighting Load questions
by HotLine1. 09/14/18 07:04 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
1 registered members (Bill Addiss), 27 guests, and 21 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
tap conductors #79298
12/12/01 09:01 AM
12/12/01 09:01 AM
N
NBuc100101@peoplepc.com  Offline OP
Junior Member
Joined: Oct 2001
Posts: 2
West Seneca, NY
We have a main circuit breaker (480 Volt, 3 phase) in an electrical enclosure. On the line side of this breaker we tap off and run number 12 wire to a 30 amp breaker which is located in the same enclosure. The 30 amp breaker is within 10 feet of the main breaker. We then take #12 wires off of the load side of the 30 amp breaker to feed another panel.
>
> Do we have a violation?

2017 / 2014 NEC & Related Books and Study Guides
Re: tap conductors #79299
12/12/01 09:56 AM
12/12/01 09:56 AM
J
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
Yes, you have violation(s).

#12 wire may be protected by not more than 20A. For 30A you must use #10AWG minimum. These ratings have been in table 310-16 for many code cycles and supercede any ampere ratings listed in the temperature columns.

Remember the tap rule is the total length of the conductors not the physical seperation of the devices.

Also how did you make the tap? It is a violation to put multiple conductors into a single lug (unless the lug is listed for that combination).


Featured:

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

 

Member Spotlight
akmaster
akmaster
alaska
Posts: 70
Joined: June 2012
Show All Member Profiles 
Top Posters(30 Days)
Admin 13
Trumpy 11
sparky 9
Popular Topics(Views)
249,297 Are you busy
187,231 Re: Forum
176,594 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.014s Queries: 14 (0.004s) Memory: 0.9421 MB (Peak: 1.0595 MB) Zlib enabled. Server Time: 2018-09-20 04:50:57 UTC