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#87281 - 02/05/04 06:53 AM Emergency Tap
drillman Offline

Registered: 03/24/03
Posts: 97
Loc: 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.

2014 / 2011 NEC & Related Books and Study Guides
#87282 - 02/08/04 05:36 AM Re: Emergency Tap
earlydean Offline

Registered: 12/22/03
Posts: 749
Loc: Griswold, CT, USA
You are right



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