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

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
fuse rejectors
by gfretwell. 03/23/17 01:12 PM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,245 Are you busy
165,957 Re: Forum
160,481 Need opinion
Who's Online Now
0 registered members (), 57 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#106979 - 03/03/01 05:13 PM Cabinet not Bonded  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,434
NY, USA
<img border="0" src=&q...uot;300" height="307">

<font face="Arial" size="2" color="#FF0000">Click Photo for a closer look</font>


<img border="0" src=&q...uot;300" height="223">

<font face="Arial" size="2"><font color="#FF0000">Click Photo for a closer look</font>.</font>


<font face="Arial" size="2">Only standard locknuts and bushings were used
in 400 Amp. current transformer cabinet.
</font>


Frank Cinker

Pittsburgh, PA


2017 / 2014 NEC & Related Books and Study Guides

#106980 - 03/03/01 05:52 PM Re: Cabinet not Bonded  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
OK Frank,
we have CT's, i see 4 wires, one possibly spliced thru. i see 208V colors, i think i see something green from the upper right of the box comming down.

I'm gonna go out on a limb here..

Are we dealing with a seperatly derived system, and violating 250-92?

[Linked Image]


#106981 - 03/03/01 06:17 PM Re: Cabinet not Bonded  
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
Shame on everyone involved. The installer failed to bond the cabinet & the conduit nipples (they might be bonded at the other end, though I tend to doubt it). If this passed inspection, the inspector was asleep & if it was energized by the power company, they too dropped the ball.

250-92 is clear about what is to be bonded & 250-94 tells you what you can/cannot use. Plain jane locknuts certainly don't cut the mustard & the #2 jumper from the grounded conductor to the CT cabinet is also missing. Also, the wireway in the upper right corner must also be bonded (bet it isn't).


Few things are harder to put up with than the annoyance of a good example.

#106982 - 03/03/01 08:36 PM Re: Cabinet not Bonded  
cinkerf  Offline
Member
Joined: Dec 2000
Posts: 84
Pittsburgh, Pennsysvania. ...
Sparky,

Tom,

This installation has not been inspected yet. I took photo so I could present it to our City's Electrical Inspection Department. It's my job to review Contractor's work performed for our Department. I work for the City of Pittsburgh. The Contractor doesn't get paid if it is not a legal installation. It is clearly in violation of the section you mentioned Tom. It is a 120/208 Volt, Three Phase, Four Wire Service Lateral. The existing C.T. Cabinet was rusted. The Contractor installed a new one and reworked the raceway.

Frank (cinkerf)


#106983 - 03/04/01 10:05 AM Re: Cabinet not Bonded  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
They also might want to do something about that black neutral conductor.


#106984 - 03/05/01 03:10 AM Re: Cabinet not Bonded  
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,232
West Virginia
Is that a "Corner Grounded Delta Configuration" (tongue in cheek)?

Looks like a green tap on the A leg...

BTW...My wife is who spotted it!

I realize that these are supplied assembled, but is green the proper color for the CT tap?


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI

#106985 - 03/05/01 07:18 AM Re: Cabinet not Bonded  
cinkerf  Offline
Member
Joined: Dec 2000
Posts: 84
Pittsburgh, Pennsysvania. ...
Sparky,

Your wife has a good eye for noticing things. The green wire you see is a #8 AWG. One end attaches to the wireway in the upper right corner of photo. The other end attaches to a ground rod located beneath C.T. cabinet. I suppose that was an attempt to ground system.

Frank (cinkerf)



Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
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 (0.003s) Memory: 0.7846 MB (Peak: 0.9379 MB) Zlib enabled. Server Time: 2017-03-23 22:09:31 UTC