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#111700 - 02/03/07 03:56 AM Dual Element Fuse
electure Offline


Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
A winner from P38J

Here's an interesting find while troubleshooting a brake press.

It was one of those "and what is this"? I pulled the fuse and read it .... an FNQ-R3 was supposed to be installed, a TRM-7 was soldered to the blown 3a.
It truly is interesting what some will do. I wonder where the burnt wire is now?
(Sorry, the pic of the fuse installed didn't come out.)

[This message has been edited by electure (edited 02-08-2007).]

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#111701 - 02/04/07 09:17 PM Re: Dual Element Fuse
Lostazhell Offline

Registered: 02/21/04
Posts: 1248
Loc: Bakersfield, CA (Originally Or...
Was this someone attempting a 10A fuse?

#111702 - 02/05/07 01:51 PM Re: Dual Element Fuse
P38J Offline
Junior Member

Registered: 01/31/07
Posts: 8
Loc: Arlington, WA.
No, I dont think they were trying for a 10a fuse. I think they blew the 3a and didn't have one. "But hey, we got a 7a we can solder together and at least make it work". (until the wires burn up)

#111703 - 02/05/07 03:35 PM Re: Dual Element Fuse
frenchelectrican Offline


Registered: 02/06/03
Posts: 938
Loc: Wi/ Paris France { France for ...
jezzz now that is very instering idea but very dangerous to do that.

i am sure the heat from soildering can weaken the fuse link inside some way also when they put that goofy fuse back in the disconnection switch they are endangering pretty good there.

i know some 30A fused disconnection switch don't have much room at all and can get flashover if not carefull there

Merci , Marc
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

#111704 - 02/05/07 05:59 PM Re: Dual Element Fuse
Lostazhell Offline

Registered: 02/21/04
Posts: 1248
Loc: Bakersfield, CA (Originally Or...
I thought of that as well, but then these fuses are the same size (physically) IIRC, so why go through the trouble of this instead of just popping the 7A in the fuseholder?

#111705 - 02/05/07 08:38 PM Re: Dual Element Fuse
NORCAL Offline

Registered: 09/25/02
Posts: 805
"so why go through the trouble of this instead of just popping the 7A in the fuseholder? "

If you look closely, the 3 A. fuse is a rejection type, so its likely its not going to fit plus the FNQ fuse is more costly so never underestimate a cheapskate.

#111706 - 02/07/07 04:57 PM Re: Dual Element Fuse
HLCbuild Offline

Registered: 12/05/04
Posts: 206
Loc: Herndon,Va USA
I'm surprised that they didn't have a 3 amp gum wrapper!

#111707 - 02/09/07 05:21 PM Re: Dual Element Fuse
Trumpy Offline


Registered: 07/05/02
Posts: 8532
Loc: SI,New Zealand
I'd be amazed if that conglomeration actually stayed together with carrying current.
Soft-soldering has a eutectic temperature of 332C, above that, this arrangement would fall to pieces.
It only has to get hot on one side mind you.
A very poor implementation of basic fusing rules.
What sort of a clown would even attempt this, let alone think that it complies with the laws of electricity.
Kirchoff's law would tell you that there is no way that this could work.
Anyone beg to differ?.
Let's face it, these days if you're not young, you're old - Red Green grin

#111708 - 02/09/07 07:20 PM Re: Dual Element Fuse
yaktx Offline

Registered: 02/19/03
Posts: 286
Loc: Austin, Texas, USA
Perfect example of a little knowledge (not to mention creativity) being dangerous.

#111709 - 02/10/07 04:40 PM Re: Dual Element Fuse
n1ist Offline

Registered: 02/13/02
Posts: 176
Loc: Malden MA
I bet the 3A one is blown, and this was a "quick fix" way of getting things running. I'm sure they planned to put the correct fuse in right away and it stayed in there until now.

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