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 inline 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 Bugeye (except for the
starter motor) goes through this wire. Install a big fuse of your choice and
turn everything on and see if the fuse holds. Turn the 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 9:23â?¯PM, David Woerpel via Spridgets
> <spridgets@autox.team.net> wrote:
>
> As 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.229621/
>
> 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 protect 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 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
Archive: http://www.team.net/pipermail/spridgets http://autox.team.net/archive
Unsubscribe/Manage:
http://autox.team.net/mailman/options/spridgets/mharc@autox.team.net
|