ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Upside Down ThreeWay
by gfretwell - 08/12/22 12:30 AM
Load Calcs for EVs and RVs
by gfretwell - 08/12/22 12:24 AM
Wiring method choice
by HotLine1 - 08/10/22 03:39 PM
NEC- 314.23 (H) (1)
by renosteinke - 08/10/22 11:13 AM
RV Forums
by gfretwell - 08/07/22 07:01 PM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 22 guests, and 23 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Oct 2000
Posts: 2,749
Member
First, let me say that I have been associated with ECN for about 3 years and have always enjoyed being involved as the person responsible for post these pictures in the forum. They are from the field and many are sent to me either here or to my email address. I also received many from readers of EC&M.

I will continue and want to thank Bill for this opportunity.

Now, let's discuss the following. Should there have been more replacements of equipment here? See any other items?

[Linked Image]

[Linked Image]


Joe Tedesco, NEC Consultant
Stay up to Code with the Latest NEC:


2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:
 

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep
 

Joined: Oct 2004
Posts: 132
M
Member
How about 300-4(f)? Ungrounded No 4 and larger conductors enter a box, ... they shall be protected by a insulated fitting.

Also, the area around the lugs looks pretty cooked. Judging by the age of that contactor, maybe it's just from continuous loading ovewr the years? I'd put some KopperKote on them if replacement wasn't an option.

Joined: Dec 2004
Posts: 209
H
Member
How about 200-6 Identifying the grounded conductor...continuous white or gray outer finish or 3 continuous white stripes?

Joined: Feb 2005
Posts: 219
S
Member
I don't like the 1 Hole lugs. They look as though they could contact another phase if you were doing a PM or service because there are no dividers.

And bushings of course.

Rob

Joined: Nov 2002
Posts: 792
Likes: 2
W
Member
At the lower right, there looks to be a mounting screw and nut behind the lower right lug. Looks like it wouldn't take much movement for the lug to short against the screw/nut. Was there some sort of block of insulation that should be used to hold the lugs more securely? I see small holes in the lugs that might have had small screws into such a block of insulation.

Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
Can anyone date the work? I figure mid-late sixties... The work itself isn't bad, clean but old. I'm not sure if bushings were even required then? Didn't they make them out of lead at the time? And didn't they just realize lead caused brain damage? Speaking of metals, the lugs look to be mounted on copper clad, or other wise coated aluminum, with some sort of tin bolt covers. The lugs look copper, but with brass set-screws. Whole lotta dis-simular metals going on from the manufacturer. Maybe this was in the height of fear over use of aluminum.

Other than the bushings, I dont see anything wrong with the workmanship, just equipment failure. If this is a 3 phase contactor, the only neutral there on the coil is id'ed.


Mark Heller
"Well - I oughta....." -Jackie Gleason
Joined: Jan 2005
Posts: 5,329
Cat Servant
Member
I see heat damage to two of the lug mounts....could just be soot from cooked insulation, but I doubt it. Assuming heat damage, this could be the result of some sustained sinfle-phase operation.
I'd feel better if the starter were replaced.

Joined: Feb 2005
Posts: 219
S
Member
After staring at this...Trying to come up with something I found a solution to saving the contactor.
1. Remove the the buss extensions.
2. Land the 1 hole lugs directly to the contactor.

This would fix any clearance issues with live an grounded parts. Like where Phase's A & C are so close to the back plate bolts.
A sheet of phenolic between the back plate & contactor would be nice.

? Is this the box that contactor came with or did someone just stuff it in Hoffman without regaurd to clearances


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
dougwells
dougwells
kamloops BC Canada
Posts: 1,157
Joined: May 2003
Top Posters(30 Days)
BigB 5
Popular Topics(Views)
295,021 Are you busy
226,689 Re: Forum
211,858 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5