--- Robert Palmer <rbpalmer_nrt@hotmail.com> wrote:
>
> According to the owner's manual, all fuses should be
> replaced with 35 amp
> fuses. Personally, I do mine as 20's for everything from
> my Hella lights to
> my GPS (each one individually fused) and haven't popped
> one yet
Manual for what?
With a 20-amp fuse in line with a bleedin' GPS the only way
that sucker's gonna blow is if the wiring gets dead shorted
to ground - and the wires will likely catch fire if they're
the usual 22-gauge stuff.. That fuse is useless - a GPS
draws an amp at best - fuse it for an amp and you're fine.
Personally, if I'm dealing with things I don't have current
ratings for I hook them up with an ammeter, measure the
start-up current draw and size 50% or thereabouts over that
(100% if it's inductive, like a motor). For example, a
blower motor that pulls 7 amps running up should get a
15-amp fuse. Panel lights draw 1/2 amp or so each,
worst-case, so a string of them should need no more than a
5-amp fuse.
Headlights at 45/55W are easy enough to figure - 12 V at 45
W is a little under 4 amps - double that for 2 lights and
allow a fudge factor of 100% for inductive kick and that
tells you about 15 amps would be fine - 20 is a
dead-certain value.
ALso remember if comparing to British manuals that the UK
fuse measurment and the US are different as far as the
rating - we rate to working load, they rate to trip
current.
Basically, PLEASE size the fuse to the load - an oversized
fuse is bloody useless. It's like sticking a penny in the
fusebox - the lights may come on but the wire becomes your
fuse - and a fire hazard.
ajr
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