[Healeys] Another con - fused question

[rd_parker at juno.com]

Bob,

Thank you for your clear, common sense answer to the subject.

Bob P.
Bellflower, CA.
1961 BT7. 
On Tue, 01 Jan 2013 16:07:30 -0500 Bob <robertlarson at att.net> writes:
> Conceptually this concept is flawed.   The fuse does not protect 
> anything 
> downstream of the
> fuse except the wire!   If he fuse blows it does so because the 
> device, the 
> relay in this case,
> has already failed or there is a wire short.  The fuse is sized to 
> allow normal 
> working with the
> device or devices downstream.
> 
> To look at it another way...  In the Kitchen one tries to run the 
> toaster, 
> microwave, and the
> coffee maker at the same time.  The fuse/breaker trips not because 
> it protected 
> any device but
> it protected the wire from overload and the potential of an 
> overheated wire from 
> stating a fire.
> 
> That is the fuse function, to protect you and the wire, not the 
> device....
> 
> Bob
> 55BN1
> 
> On 1/1/2013 2:03 PM, Richard Ewald wrote:
> > Only items downstream from the fuse will be protected by that 
> fuse.  So if
> > you put the fuse downstream of the relay, the relay won't be 
> covered.  If
> > you put it upstream on the relay the relay will be protected.
> >
> >
> > On Tue, Jan 1, 2013 at 11:01 AM, john spaur 
> <jmsdarch at sbcglobal.net> wrote:
> >
> >> There are two white wires going to the OD relay. One comes from 
> the fuse
> >> block at A3.
> >>
> >> The other goes from the relay down to the overdrive switch on the 
> dash. Is
> >> this the correct wire to fuse?
> >>
> >> TIA
> >> John Spaur
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> 
 
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