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Re: Lucas Fuses, need the facts

To: TriStagReg@aol.com
Subject: Re: Lucas Fuses, need the facts
From: George Richardson <gprtech@frontiernet.net>
Date: Sun, 06 Feb 2000 20:40:56 -0500
Cc: ArthurK101@aol.com, MMoore8425@aol.com, amace@unix2.nysed.gov, levilevi@home.com, stag@digest.net, triumphs@autox.team.net
Organization: Merlin Group Inc.
References: <25.18eb2ae.25cf1c11@aol.com>
I've got no augments except one - The lucas fuses that I have from both my Stag
and 2 Jag XJ6 are identical in size to what used to be the old BAG size in the 
US.
Identical.

TriStagReg@aol.com wrote:

> My Apologies to Art, Mike, Andy, and George.
>
>     Did not mean to piss you off.  Just got a bit heavy handed on my
> responses.  I must realize that everyone is not an electrical engineer, and
> you caught the brunt of a similar discussion I had Wednesday and Thursday at
> a client sending equipment to the EC.
>
>     Point is, there is only a difference in semantics, not design.  The Lucas
> "35 amp fuse"  is actually a 17 amp fuse rated at 17 amps with a 35 amp surge
> rating.  It has "35" in the paper tube to show surge rating, and shows 17
> amps continuous current rating.  If you read the application information for
> the Lucas fuses, this point is clear.
>
>     The right approach for this is for me (and possibly George and Dan) to
> gather the design information FACTS from Lucas and the USA manufacturers, the
> standards they use, sort out the chaff and do a one paragraph analysis.
> I'll gather all the relevant "design and application" information, make the
> simple comparison, and email to the lists and add it to the VTR pages.  What
> we will find however, is that owners are installing the incorrect "size",
> "type", and "rating" of fuse.
>
> The real danger here is that owners do not replace the fuses in their cars
> with the correct "size", "type" or "rating" fuse.  A Lucas fuse came out, a
> Lucas or "similar equivalent" fuse must ALWAYS go back in.  That is,  a 5mm x
> 20mm size "IEC" type fuse came out, replace it with the same physical size,
> type and rated fuse.  If you have Chrysler, do you put VW parts into it?
>
>     For George, US manufacturers always use the relevant and proper standards
> when designing a "size" fuse, absolutely no question about it.  It is the
> application engineer that errors, or the maintenance technician.  That is,
> when Littlefuse makes a 5mm x 20mm fuse, it is made to IEC standards because
> we do not use 5mm x 20 mm fuses normally in the states. That means its
> labeling corresponds to the IEC tests and specifications, just like a Lucas
> fuse does. It even says "IEC" on the fuse cap in most instances.  Lucas fuses
> are indeed 5mm x 20 mm IEC fuses.  US fuses do not fit in the fuse clips of
> Triumphs because US fuses are larger physical size.  Take a look at the
> Littlefuse and Bussman catalogs, they are quite clear on this.
>     This is why manufacturers sell fuse clips that correspond to the fuses
> that they produce, so when the maintenance tech tries to fit a different
> rated, size or type of fuse, it will usually not fit into the clips.  This is
> supposed to be the first indication to the person replacing the fuse to tell
> them the fuse they are trying to insert is incorrect.
>     If you get a 35 amp US made Littlefuse or Bussman fuse to put into the
> place a Lucas fuse came out of, it extends past the fuse clips.  If you buy a
> US made Littlefuse or Bussman 5mm x 20mm 35 amp fuse, it states on it 17amps
> / 35 amps, and it fits within the fuse clips.
>
>     In closing, Art has brought up a very valid and straight forward question
> that I am sure other Triumph owners in non EC countries have wrestled with
> for years and caused a lot of damage through mis-application.  It is up to
> those of us who have the expertise in these areas to provide a proper
> solution and correct erroneous assumptions that could cause harm.  Agreed, I
> was a bit heavy handed, but this discussion needs to be brought out clearly
> with correct information, not supposition.
>
> Art, to answer your question the way should have the first time, when you go
> the auto parts store, ask for a Lucas fuse equivalent, or IEC equivalent, or
> 5mm x 20 mm fuse physical size.  Take in the old one, and make sure it says
> on it IEC, with the two ratings on the cap for current/surge.  Replace it
> with the correct equivalent OEM type part, just like any other part on your
> British Car.
>
> In My Not So Humble Opinion, We should not speculate on this one ...
>
> Regards,
> Glenn  Merrell
> Triumph Stag Register USA VP
> mailto:TriStagReg@aol.com
>  <A HREF="http://members.aol.com/tristagreg/";>Triumph Stag Register Web Page</
> A>
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> **

--
George Richardson
The Wyvern - '57 Triumph TR3, TS15559L - http://www.merlingroupinc.com/tr3.htm
The Hippogrif - '71 Triumph Stag MKI, LE8176E - soon to get a site of it's own
Kitty - '83 Jaguar XJ6 Vanden Plas - Daily Driver (when running)



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