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I'm late to this convo, sorry if this has already been suggested, but
wouldn't an amp meter on the main feed answer the question.
-Trevor
On Thu, Apr 17, 2025, 8:37=E2=80=AFAM Rick Fisk via Spridgets <
spridgets@autox.team.net> wrote:
> Paul and all,
>
> I was thinking about this last night while trying to fall asleep and came
> up with a simple plan to determine how big of a fuse or breaker you will
> need. Remove the brown wire from the starter switch and install an inlin=
e
> fuse holder between the end of the wire and it's connection point on the
> starter switch. All current used to run everything electrical on a Bugey=
e
> (except for the starter motor) goes through this wire. Install a big fus=
e
> of your choice and turn everything on and see if the fuse holds. Turn th=
e
> key to the "On" position and then turn on the highbeam headlights, turn
> signals, heater fan, wipers, step on the brake pedal, and then blow the
> horn. If the fuse is big enough it won't blow. You can experiment with
> bigger and smaller fuses until you find the load. When you find the fuse
> that blows go 20% bigger for a safety margin and you're good. :-)
>
> Rick
>
> > On Apr 16, 2025, at 9:23=E2=80=AFPM, David Woerpel via Spridgets <
> spridgets@autox.team.net> wrote:
> >
> > =EF=BB=BFAs an addendum to my earlier post I found this on "Experience"
> >
> >
> https://www.ahexp.com/forum/the-sprite-forum.6/size-of-fuses-58-bugeye.22=
9621/
> >
> > Dave W
> >
> > '59 :{)
> > '59 MGA 1500
> >
> > "Pay It Forward"
> >
> >
> >
> >
> >> On 4/16/2025 7:19 PM, Bill L. via Spridgets wrote:
> >> Hello Paul,
> >>
> >>
> >> There's something about the ratings of those old British fuses that's
> odd. They are IIRC slow blow so not rated as we would normally think them=
.
> >>
> >> I know BugEyeGuy sells a dummy regulator )for use with a GENERNATOR
> with a 50A fuse link. I have one. .. On the other hand fuses are to prote=
ct
> the wires, not the devices that utilize the power. So what is the size (a=
nd
> thus the amperage rating of the wiring? I think that largest other than t=
he
> starter is 14, (15A capacity in house wiring) but even if it's 12 that's
> still only 20A. .. On the other hand the starter is wired with #4. That's
> 100A house wiring and a typical starter in an MGB (from my quick research=
)
> is over 250A.
> >>
> >> All that taken into account, I think BugEyeGuy has it correct and the
> 50A fuse link has never cause me any problem.
> >>
> >> (here's where I mention that I put my STEBEL horn on it's own fuse as
> it draws 18A. 125db IIRC.
> >>
> >>
> >>
> >>
> >
> > ------------------------
> >
> > spridgets@autox.team.net
> >
> > Donate: http://www.team.net/donate.html
> > Suggested annual donation: $12.75
> >
> > Archive: http://www.team.net/pipermail/spridgets
> http://autox.team.net/archive
> >
> > Unsubscribe/Manage:
> http://autox.team.net/mailman/options/spridgets/refisk@chartermi.net
>
> ------------------------
>
> spridgets@autox.team.net
>
> Donate: http://www.team.net/donate.html
> Suggested annual donation: $12.75
>
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<div dir=3D"auto">I'm late to this convo, sorry if this has already bee=
n suggested, but wouldn't an amp meter on the main feed answer the ques=
tion.<div dir=3D"auto"><br></div><div dir=3D"auto">-Trevor</div></div><br><=
div class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D"g=
mail_attr">On Thu, Apr 17, 2025, 8:37=E2=80=AFAM Rick Fisk via Spridgets &l=
t;<a href=3D"mailto:spridgets@autox.team.net";>spridgets@autox.team.net</a>&=
gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
.8ex;border-left:1px #ccc solid;padding-left:1ex">Paul and all,<br>
<br>
I was thinking about this last night while trying to fall asleep and came u=
p with a simple plan to determine how big of a fuse or breaker you will nee=
d.=C2=A0 Remove the brown wire from the starter switch and install an inlin=
e fuse holder between the end of the wire and it's connection point on =
the starter switch.=C2=A0 All current used to run everything electrical on =
a Bugeye (except for the starter motor) goes through this wire.=C2=A0 Insta=
ll a big fuse of your choice and turn everything on and see if the fuse hol=
ds.=C2=A0 Turn the key to the "On" position and then turn on the =
highbeam headlights, turn signals, heater fan, wipers, step on the brake pe=
dal, and then blow the horn.=C2=A0 If the fuse is big enough it won't b=
low.=C2=A0 You can experiment with bigger and smaller fuses until you find =
the load.=C2=A0 When you find the fuse that blows go 20% bigger for a safet=
y margin and you're good.=C2=A0 :-)<br>
<br>
Rick<br>
<br>
> On Apr 16, 2025, at 9:23=E2=80=AFPM, David Woerpel via Spridgets <<=
a href=3D"mailto:spridgets@autox.team.net"; target=3D"_blank" rel=3D"norefer=
rer">spridgets@autox.team.net</a>> wrote:<br>
> <br>
> =EF=BB=BFAs an addendum to my earlier post I found this on "Exper=
ience"<br>
> <br>
> <a href=3D"https://www.ahexp.com/forum/the-sprite-forum.6/size-of-fuse=
s-58-bugeye.229621/" rel=3D"noreferrer noreferrer" target=3D"_blank">https:=
//www.ahexp.com/forum/the-sprite-forum.6/size-of-fuses-58-bugeye.229621/</a=
><br>
> <br>
> Dave W<br>
> <br>
> '59 :{)<br>
> '59 MGA 1500<br>
> <br>
> "Pay It Forward"<br>
> <br>
> <br>
> <br>
> <br>
>> On 4/16/2025 7:19 PM, Bill L. via Spridgets wrote:<br>
>> Hello Paul,<br>
>> <br>
>> <br>
>> There's something about the ratings of those old British fuses=
that's odd. They are IIRC slow blow so not rated as we would normally =
think them.<br>
>> <br>
>> I know BugEyeGuy sells a dummy regulator )for use with a GENERNATO=
R with a 50A fuse link. I have one. .. On the other hand fuses are to prote=
ct the wires, not the devices that utilize the power. So what is the size (=
and thus the amperage rating of the wiring? I think that largest other than=
the starter is 14, (15A=C2=A0 capacity in house wiring) but even if it'=
;s 12 that's still only 20A. .. On the other hand the starter is wired =
with #4. That's 100A house wiring and a typical starter in an MGB (from=
my quick research) is over 250A.<br>
>> <br>
>> All that taken into account, I think BugEyeGuy has it correct and =
the 50A fuse link has never cause me any problem.<br>
>> <br>
>> (here's where I mention that I put my STEBEL horn on it's =
own fuse as it draws 18A.=C2=A0 =C2=A0125db IIRC.<br>
>> <br>
>> <br>
>> <br>
>> <br>
> <br>
> ------------------------<br>
> <br>
> <a href=3D"mailto:spridgets@autox.team.net"; target=3D"_blank" rel=3D"n=
oreferrer">spridgets@autox.team.net</a><br>
> <br>
> Donate: <a href=3D"http://www.team.net/donate.html"; rel=3D"noreferrer =
noreferrer" target=3D"_blank">http://www.team.net/donate.html</a><br>
> Suggested annual donation: $12.75<br>
> <br>
> Archive: <a href=3D"http://www.team.net/pipermail/spridgets"; rel=3D"no=
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> <br>
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><br>
<br>
------------------------<br>
<br>
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rrer">spridgets@autox.team.net</a><br>
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ets/trevor.jessie@gmail.com" rel=3D"noreferrer noreferrer" target=3D"_blank=
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a><br>
</blockquote></div>
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