ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Safety at heights?
by gfretwell - 04/23/24 03:03 PM
Old low volt E10 sockets - supplier or alternative
by gfretwell - 04/21/24 11:20 AM
Do we need grounding?
by gfretwell - 04/06/24 08:32 PM
UL 508A SPACING
by tortuga - 03/30/24 07:39 PM
Increasing demand factors in residential
by tortuga - 03/28/24 05:57 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 228 guests, and 10 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#79298 12/12/01 09:01 AM
Joined: Oct 2001
Posts: 2
N
Junior Member
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?

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

#79299 12/12/01 09:56 AM
Joined: Jul 2001
Posts: 599
J
JBD Offline
Member
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).


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5