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

ECN Shout Chat
Top Posters(30 Days)
Admin 19
Recent Posts
Anyone hiring inspectors?
by HotLine1. 03/27/17 08:03 AM
Old decora style outlets
by Admin. 03/25/17 11:40 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
fuse rejectors
by HotLine1. 03/24/17 07:53 AM
Another Forum Update
by Admin. 03/22/17 03:04 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,626 Are you busy
166,455 Re: Forum
160,717 Need opinion
Who's Online Now
0 registered members (), 68 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#87281 - 02/05/04 10:53 AM Emergency Tap  
drillman  Offline
Member
Joined: Mar 2003
Posts: 97
Somewhere in Texas
Found a 100 amp emergency panel fed from a tap of parallel feeders.

The feeders are two sets of 3 ought in two - 2 inch pipes. These have a 350 amp breaker on them.

The tap was made in a pullbox using those piercing type things.

They tapped one set of feeders with #6 wire and ran it about 20 to 30 feet to a panel with an 100 amp main breaker. Did a clamp on test with everything on and theres about 25 amps on each phase.

The panel is mounted above a 30 kva transformer right in front of it. This is funny because 5 feet away there is a clear space.

Plus, the neutral bus of the hacked in emergency panel is connected to the neutral bus on the normal panel.

I told the boss that you cannot tap one side of a parallel feed as it creates an imbalance and that we would need to buy a breaker to refeed the panel and disconnect the tap. Yes, there is room in the main emergency panel for another 3 breakers if needed.

Am I right?

Just want to be sure I am not telling the boss something that will bite me later. Keep in mind my boss is a supervisor with a mangement degree not a technical guy. This is actually good.

The thing about this is that someone went to a lot of trouble to do a lousy job.


2017 / 2014 NEC & Related Books and Study Guides

#87282 - 02/08/04 09:36 AM Re: Emergency Tap  
earlydean  Offline
Member
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
You are right

Earl


Earl


Member Spotlight
Posts: 165
Joined: March 2007
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: 0.013s Queries: 14 (0.002s) Memory: 0.7417 MB (Peak: 0.8566 MB) Zlib enabled. Server Time: 2017-03-28 06:20:05 UTC