ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
What does your work place look like?
by Trumpy - 11/30/20 02:45 AM
Insulated Tools: A Waste of Money?
by Trumpy - 11/30/20 02:32 AM
Ground fault remover :-)
by Trumpy - 11/30/20 02:27 AM
Where is Everyone?
by gfretwell - 11/27/20 06:18 PM
Happy Thanksgiving
by gfretwell - 11/26/20 08:52 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Trumpy), 17 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Fuse installed by a non-electrician! #104754 10/21/03 09:12 PM
Joined: Oct 2000
Posts: 2,749
Joe Tedesco Offline OP
[Linked Image]

The center fuse was not seated properly!

There is no excuse for this type of work by anyone!!

Joe Tedesco, NEC Consultant
2017 / 2014 NEC & Related Books and Study Guides
Re: Fuse installed by a non-electrician! #104755 10/21/03 09:58 PM
Joined: Aug 2002
Posts: 1,691
SvenNYC Offline
Joe is that u-shaped metal spring clip supposed to be there?

I've seen people use similar shaped pieces of spring steel to clip papers together.

I see what looks like the outline of another clip in the lower fuse, but I thought the fuse was supposed to be held in place by the spring action of the terminals the fuse blades slide into?

Re: Fuse installed by a non-electrician! #104756 10/22/03 12:37 PM
Joined: Nov 2001
Posts: 745
mamills Offline
We've all heard the saying "haste makes waste" kinda looks like this person was in an awful big hurry [Linked Image]

Mike (mamills)

Re: Fuse installed by a non-electrician! #104757 10/22/03 02:00 PM
Joined: Apr 2002
Posts: 7,218
HotLine1 Offline
Looking at the pic carefully, this looks like a cronic overheating problem that is at the fail point.

The discoloration of the "b" phase fuseholder, and the fuse are usually caused by excessive heat. As the fuse clips heat-up, they get metal fatigue, and loose the spring tension, further aggravating the heating situation.

The "metal clips" are spring steel, that is factory installed on "A" & "C" phases; the piece on "b" looks like a "band-aid" fix that didn't work well.

THe fuse mfg's (Bussman) used to make a fuseholder clip retrofit for clips that had failed spring tension. I don't know if they are still available; they were OK IF you caught the tension failure early.

I would like to see the "B" fuse out of the fuseholder, to see if that's a "split" in the copper or some fancy attempt at machine work.


Re: Fuse installed by a non-electrician! #104758 10/22/03 02:09 PM
Joined: Sep 2003
Posts: 114
sparked Offline
Looking at the phase B fuse. It looks like they installed one end (the one not pictured) somewhat correctly. And used the tension form that knife blade to press the pictured end of the fuse onto the fuseholder terminals. It sort of looks like the blade was split, but I think there was just arcing and it made a carbon path to the blade. That would also explain why the silver end part is crooked, the black part of the fuse was able to straighten out after it overheated.

Re: Fuse installed by a non-electrician! #104759 10/22/03 02:12 PM
Joined: Oct 2003
Posts: 289
:andy: Offline
to me it looks like the fuse contact was put under the socket, not in it.
the thing that looks like split is the socket on top and the fuse's contact on bottom. the black line looking like the split is the shadow the holder throws on the fuse's contact.

Re: Fuse installed by a non-electrician! #104760 10/22/03 02:18 PM
Joined: Sep 2003
Posts: 114
sparked Offline

About the fuse blade. I was trying to say the blade was under the socket. You said it better than I could. Hovever, I don't think that's a shadow, I think its a gap between the clip and blade.

Re: Fuse installed by a non-electrician! #104761 10/22/03 06:09 PM
Joined: Aug 2001
Posts: 7,520
pauluk Offline
It looks to me as though the whole clip assembly on that middle phase has been cobbled together as what in Britain we would call a "bodge."

It doesn't even look like the original bolt holding the clip down: Philips head vs. straight on the bottom phase.

Re: Fuse installed by a non-electrician! #104762 10/23/03 10:17 PM
Joined: Oct 2003
Posts: 147
crash Offline
Did someone take a hacksaw and cut the blade on the fuse down the middle? Tis thing is a real bodge. CHEERS!

Re: Fuse installed by a non-electrician! #104763 10/23/03 10:30 PM
Joined: May 2001
Posts: 552
txsparky Offline
The fuse or the fuse clip are not split.The tension clip that you see is right where it is supposed to be. The fuse blade was not inserted into the fuse clip, but instead, the blade was placed below the fuse clip..The lower part of the fuse clip has darkened from overheating but it is still intact.
Maybe this disconnect takes care of the lighting and the installer didn't have a flashlight with him at the time of install [Linked Image]

Page 1 of 2 1 2


2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

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


Member Spotlight
Bill Addiss
Bill Addiss
Posts: 3,964
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 9
Popular Topics(Views)
272,103 Are you busy
205,995 Re: Forum
194,031 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3