Subject: [Spridgets] Fusible Link

From: Paul Van Wig via Spridgets <[email-masked]>
Date: Wed, 16 Apr 2025 10:55:07 -0700

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I=E2=80=99m thinking about an overall fuse or circuit breaker to protect =
the wiring harness. But the question is how many amps? =20

Paul Van Wig
Big Bear/Lakewood, CA

=EF=BF=BC

1959 Nash Metropolitan "Tiffany" (the wife's fun ride) w/63MGB motor
1960 Bug Eye =E2=80=9CFrogari=E2=80=9D 1310cc,Kent 286 cam, Webber 45, =
Datsun 5 speed,4 wheel disc brakes
1968 Morris Minor Woody RHD "Thomas"

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">I=E2=80=99m =
thinking about an overall fuse or circuit breaker to protect the wiring =
harness. But the question is how many amps? &nbsp;<br><div>
<span class=3D"Apple-style-span" style=3D"font-family: Helvetica; =
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after-white-space;"><div style=3D"font-family: Helvetica; word-wrap: =
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after-white-space;"><div><font class=3D"Apple-style-span" face=3D"'Arial =
Rounded MT Bold'" size=3D"4">Paul Van Wig</font></div><div><font =
class=3D"Apple-style-span" face=3D"'Arial Rounded MT Bold'" size=3D"4">Big=
 Bear/Lakewood, CA</font></div></div></div><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
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normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
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rgb(0, 0, 0); color: rgb(0, 0, 0);"><span></span></span><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
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font-size: 13px; line-height: normal;"><div style=3D"margin: 0px; =
font-stretch: normal; line-height: normal;"><span style=3D"font-kerning: =
none;"><i>1959 Nash Metropolitan "Tiffany" (the wife's fun ride) w/63MGB =
motor</i></span></div><div style=3D"margin: 0px; font-stretch: normal; =
font-size: 14px; line-height: normal;"><span style=3D"font-stretch: =
normal; font-size: 13px; line-height: normal; font-kerning: =
none;"><i>1960 Bug Eye =E2=80=9CFrogari=E2=80=9D<span =
class=3D"Apple-converted-space">&nbsp;</span></i></span><span =
style=3D"font-kerning: none;"><i>1310cc,Kent 286 cam, Webber 45, Datsun =
5 speed,4 wheel disc brakes</i></span></div><div style=3D"margin: 0px; =
font-stretch: normal; line-height: normal;"><span style=3D"font-kerning: =
none;"><i>1968 Morris Minor Woody RHD =
"Thomas"</i></span></div></div></span></div>
</div>

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Archive: http://www.team.net/pipermail/spridgets  http://autox.team.net/archive

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From: Rick Fisk via Spridgets <[email-masked]>
Date: Thu, 17 Apr 2025 10:14:52 -0400

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">Yes=
 it would, but I don't have an ammeter. &nbsp;:-)</div><div dir=3D"ltr"><br>=
<blockquote type=3D"cite">On Apr 17, 2025, at 9:31=E2=80=AFAM, Trevor Jessie=
 &lt;[email-masked]&gt; wrote:<br><br></blockquote></div><blockquote=
 type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto">I'm late to this c=
onvo, sorry if this has already been suggested, but wouldn't an amp meter on=
 the main feed answer the question.<div dir=3D"auto"><br></div><div dir=3D"a=
uto">-Trevor</div></div><br><div class=3D"gmail_quote gmail_quote_container"=
><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Apr 17, 2025, 8:37=E2=80=AFAM=
 Rick Fisk via Spridgets &lt;<a href=3D"mailto:[email-masked]">spr=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quo=
te" 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 up=
 with a simple plan to determine how big of a fuse or breaker you will need.=
&nbsp; Remove the brown wire from the starter switch and install an inline f=
use holder between the end of the wire and it's connection point on the star=
ter switch.&nbsp; All current used to run everything electrical on a Bugeye (=
except for the starter motor) goes through this wire.&nbsp; Install a big fu=
se of your choice and turn everything on and see if the fuse holds.&nbsp; Tu=
rn the key to the "On" position and then turn on the highbeam headlights, tu=
rn signals, heater fan, wipers, step on the brake pedal, and then blow the h=
orn.&nbsp; If the fuse is big enough it won't blow.&nbsp; You can experiment=
 with bigger and smaller fuses until you find the load.&nbsp; When you find t=
he fuse that blows go 20% bigger for a safety margin and you're good.&nbsp; :=
-)<br>
<br>
Rick<br>
<br>
&gt; On Apr 16, 2025, at 9:23=E2=80=AFPM, David Woerpel via Spridgets &lt;<a=
 href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferre=
r">[email-masked]</a>&gt; wrote:<br>
&gt; <br>
&gt; =EF=BB=BFAs an addendum to my earlier post I found this on "Experience"=
<br>
&gt; <br>
&gt; <a href=3D"https://www.ahexp.com/forum/the-sprite-forum.6/size-of-fuses=
-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><b=
r>
&gt; <br>
&gt; Dave W<br>
&gt; <br>
&gt; '59 :{)<br>
&gt; '59 MGA 1500<br>
&gt; <br>
&gt; "Pay It Forward"<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt;&gt; On 4/16/2025 7:19 PM, Bill L. via Spridgets wrote:<br>
&gt;&gt; Hello Paul,<br>
&gt;&gt; <br>
&gt;&gt; <br>
&gt;&gt; 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>
&gt;&gt; <br>
&gt;&gt; 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&nbsp; capacity in house wiring) but even if it's 12 tha=
t'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>
&gt;&gt; <br>
&gt;&gt; All that taken into account, I think BugEyeGuy has it correct and t=
he 50A fuse link has never cause me any problem.<br>
&gt;&gt; <br>
&gt;&gt; (here's where I mention that I put my STEBEL horn on it's own fuse a=
s it draws 18A.&nbsp; &nbsp;125db IIRC.<br>
&gt;&gt; <br>
&gt;&gt; <br>
&gt;&gt; <br>
&gt;&gt; <br>
&gt; <br>
&gt; ------------------------<br>
&gt; <br>
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referrer">[email-masked]</a><br>
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