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Fuse installed by a non-electrician! #104754 10/21/03 09:12 PM
Joined: Oct 2000
Posts: 2,749
Joe Tedesco Offline OP
Member
[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
S
SvenNYC Offline
Member
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
M
mamills Offline
Member
We've all heard the saying "haste makes waste"...it 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
Member
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.

John


John
Re: Fuse installed by a non-electrician! #104758 10/22/03 02:09 PM
Joined: Sep 2003
Posts: 114
S
sparked Offline
Member
Hotline1
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
Member
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
S
sparked Offline
Member
:andy:,

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
P
pauluk Offline
Member
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
C
crash Offline
Member
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
T
txsparky Offline
Member
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]


Donnie
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