Simon,
You can take any fused live 12V feed you like as long as is fed through
the ignition lock. So the 12V supply to your ammeter is not suitable as
this is a direct feed from the battery/generator, with the only bypass
for the starter engine.
The voltmeter will draw some current, only a few mA, so when the engine
is switched of you do not want to power it.
Kees Oudesluijs
NL
Op 20-4-2013 8:18, Simon Lachlan schreef:
> I've received much sage advice from this list and now I'm after some
> more.....
>
> Opinions differ as to whether one is better off with an ammeter or a volt
> meter. Opinions differ again if one has an alternator in place of the
> generator.
>
> "Why not have both?", someone asked. And I'm going to.
>
> I had an ammeter with my generator and nothing much will change there. But
> the voltmeter?....
>
> Can I connect one of the voltmeter's two terminals to either of the
> ammeter's two terminals and the other of the voltmeter's two terminals to
> earth? As the gauges will be together in the same bracket, it seems sensible
> to take the 12v feed from the ammeter. Or am I wrong?
>
> Simon
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