Home » Public Forums » GMCnet » Fall GMCMI Rally in Chippewa falls (just a few photos)
| [GMCnet] Re: Fall GMCMI Rally in Chippewa falls [message #367045 is a reply to message #367040] |
Mon, 04 October 2021 18:14  |
dsmithy
Messages: 210
Registered: July 2012
Location: Lincoln Nebraska
Karma:
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Thank you Kens, Jon and Emery.
I think I understand the fusible link much better as well as the alternator excite wire. I have an October 1973 coach and every single time I look under anyones passenger access panel I see something different and something different from what is under my own. Having never had a problem with my link, I didn’t even know which wire it was. I already have installed the Alternator Protection Cable so, in theory, I shouldn’t have a problem with my exciter cable either.
Ken, I will take your counsel that a fusible link is fundamentally different than a breaker and should not be replaced with one. Apparently Jeff Sirum has a different opinion.
Thank you all.
Doug
> On Oct 4, 2021, at 3:17 PM, Ken Henderson wrote:
>
> The Fusible Link IS outside of the wiring harness and I've never heard of
> one doing damage. On the other hand, there is within the main cockpit
> wiring harness a Nichrome wire used for excitation of the alternator's
> field, which can, and HAS caused severe damage to the other wiring in that
> harness. Gene Fisher's Alternator Protection Cable (APC) SHOULD be used to
> prevent that possibility; it works by preventing high voltage from a
> malfunctioning alternator from passing back through that 10.0 Ohm cable.
>
> Ken H.
>
> On Mon, Oct 4, 2021 at 10:34 AM D C _Mac_ Macdonald
> wrote:
>
>> From what I have read here over the past years,
>> it would seem to me that a good idea would be to
>> install a new fusible link OUTSIDE of the wiring
>> harness. This would avoid having a severely melted
>> link from destroying an entire harness as has been
>> reported.
>>
>> D C "Mac" Macdonald
>> Amateur Radio K2GKK
>> Since 30 November '53
>> USAF and FAA, Retired
>> Member GMCMI & Classics
>> Oklahoma City, OK
>> "The Money Pit"
>> TZE166V101966
>> '76 ex-Palm Beach
>> k2gkk + hotmail dot com
>>
>> ________________________________
>> From: John R.Lebetski
>> Sent: Monday, October 4, 2021 09:05
>> To: gmclist@list.gmcnet.org
>> Subject: [GMCnet] Re: Fall GMCMI Rally in Chippewa falls
>>
>> I was just about to comment on the fusible link topic, but Ken B covered
>> it very well.
>> I don’t have the schematic in front of me but from memory is that add on
>> breaker were to open, charge Voltage would overshoot high, That could cause
>> secondary damage.
>> There was pretty much a “reason why” behind everything engineers did.
>> Only understanding part of the picture and not the whole scope leads to
>> problems when people try to improve on designs.
>> --
>> John Lebetski
>> Woodstock, IL
>> 77 Eleganza II
>> _______________________________________________
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Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
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