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
0 registered members (), 44 guests, and 25 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Cabinet not Bonded #112091
03/03/01 05:13 PM
03/03/01 05:13 PM
Admin  Offline
OP
Administrator
Member
Joined: Oct 2000
Posts: 3,516
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

Tools for Electricians:
Re: Cabinet not Bonded #112092
03/03/01 05:52 PM
03/03/01 05:52 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,360
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]

Re: Cabinet not Bonded #112093
03/03/01 06:17 PM
03/03/01 06:17 PM
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.
Re: Cabinet not Bonded #112094
03/03/01 08:36 PM
03/03/01 08:36 PM
C
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)

Re: Cabinet not Bonded #112095
03/04/01 10:05 AM
03/04/01 10:05 AM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,274
Fullerton, CA USA
They also might want to do something about that black neutral conductor.

Re: Cabinet not Bonded #112096
03/05/01 03:10 AM
03/05/01 03:10 AM
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,236
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
Re: Cabinet not Bonded #112097
03/05/01 07:18 AM
03/05/01 07:18 AM
C
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)


Featured:

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

 

Member Spotlight
dougwells
dougwells
kamloops BC Canada
Posts: 1,149
Joined: May 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 13
Trumpy 11
sparky 9
Popular Topics(Views)
249,304 Are you busy
187,237 Re: Forum
176,605 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.020s Queries: 14 (0.004s) Memory: 0.9863 MB (Peak: 1.1390 MB) Zlib enabled. Server Time: 2018-09-20 11:08:53 UTC