[alfa] Re: Wiring a Thermo Fan

[Joe Elliott <jee@xxxxxxxxxxxxxx>]

At 8:34 PM +0000 4/10/04, alfa-digest wrote:
> 1.    I have both 70A and 30A relays.  Is 70A overkill for a small thermo ?
I would think so, but if you have an ammeter you can check without 
too much difficulty.  Perhaps some electrical engineers can correct 
me, but I'd guess that the fuse should be rated for ~50% more than 
what the device usually draws.


> 2.    Do I run the fan's main power without a fuse directly from a 'hot' power
> source such as alt, batt, or starter ?
You want it to be fused, as near the power source as possible.

> 3.    Do I run the relay 'switching' power thru a fuse ?
Yes.  The current required will be on the order of 5mA, so you can 
take this power from an existing circuit in the fuse box.

HTH,
Joe
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