I just happened to be working on the electrical system on my Jag XJ6 yesterday,
and ended up pulling a whole bunch of Lucas fuses that were labeled with their
current ratings.
A Lucas fuse is rated by what current it would blow at. U.S. fuses are rated by
what current you can draw *without* blowing them, or the maximum continuous
current. They don't really specify the current they'll blow at.
Anyway, these lucas fuses had both the Lucas "blow at" rating, and the maximum
continuous current, i.e. the US rating labeled on them.
So here's your equivalents:
Lucas 50 amp - continuous 25 amp
Lucas 35 amp - continuous 17 amp
Lucas 20 amp - continuous 10 amp
Lucas 15 amp - continuous 8 amp
Lucas 10 amp - continuous 5 amp
Lucas 2 amp - continuous 1 amp
See the trend here? Each fuse is actually good for a continuous current that's
about 1/2 of it's rating.
By the way, these Lucas fuses are either suffering from old age, or they weren't
made very well. On removal;, they often fall apart. They also exhibit higher
resistance than I would care to see in an electrical system.
Take my advise and get good US equivalents.
Ken Gano wrote:
> I have been reminded that Lucas fuses were sized differently than US
> standards. It was suggested that a 30 Amp Lucas are something like a 17 amp
> Buss. Does anyone know what the Buss cross reference for a Lucas 35 Amp?
> (or the 30 amp, for sure)
>
> Sunday in rural middle America and I think I'd better be looking for Buss
> rather and Lucas.
>
> TIA
>
> Ken Gano
--
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 - Undergoing repair
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