Jack -
Its ok. No prob. Actually all AUX items on my cars are on a relay
and fuse. I am very safe.
Incidentally many items are typically ground switched, including
electric radiator fans and the SU Automatic Enrichement Device, for
example, so negative switching is fairly common.
Thanks all for you thoughts on this!
Cheers,
Alan
On 11/1/10, Jack Feldman <qualitas.jack@gmail.com> wrote:
> It has been an interesting thread, but a scary one. THE SWITCH MUST GO IN
> THE POSITIVE LEAD. Any electrician or Radio Amateur with kit building
> experience will tell you so.
>
> First, the fact that they don't sell negative working switches should be a
> clue. Second, if you look at the electrical code for your house, at least in
> the US, you will find it is illegal to put the switch in the neutral, or
> grounded lead. The switch must always be in the hot lead. I can't speak for
> other countries, I know they do things differently in England, but I'm not
> sure that extends to switching the neutral.
>
> If you are adding a switch, it is easy to put an inline fuse in the circuit.
> The holders are inexpensive and easy to crimp of solder. Soldering being
> preferred.
>
> One person in my club added a fuse block for bladed fuses to his Buy-Eye. I
> had a mechanic to the same for me. I bought a block with LED indicators to
> show when the fuse is blown. The LED is in parallel to the fuse so it only
> works on non interrupted circuits.
>
> If I sound too harsh, please accept my apology, but I would hate to have
> anyone's beloved car burn up because of improper wiring.
>
> Jack
> KA9HEL
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