[Spridgets] Relays

[Herbert Miller]

Comments on relays:
As commented in a previous post "for max light output place the relay as
close to the headlights as possible" I don't see the rational. If the 12v
wire to the relay and the relay wire to the headlights are the same gauge
and construction there would be no difference in the voltage drop no mater
where the relay is placed. Further, to run a heavy gauge 12v wire that is
always hot a long distance through the chassis adds risk. Think Bugeye, up
around the bonnet hinge and forward under the bonnet. I would rather have
the headlight leads only powered when the lights are on, a small percentage
of the time. Besides if a problem occurred in the headlight lead it could be
quickly turned off.

One point of view

Herb Miller   

-----Original Message-----
From: spridgets-bounces at autox.team.net
[mailto:spridgets-bounces at autox.team.net] On Behalf Of Bill L
Sent: Sunday, February 15, 2009 9:48 AM
To: spridgets at autox.team.net
Subject: Re: [Spridgets] Relays

Hello,

      In general, relays are used to use control one load with a
      DIFFERENT SIZED load. Yes, in car applications they are for
      switching a larger load with a smaller one, BUT,

      They are essentially used as circuit ISOLATORS. That is, to
      separate one load from another, whether of different CURRENT or
      VOLTAGE ratings or BOTH. Matters not whether the larger controls
      the smaller or vice versa, the circuits are kept from each
      other.

      They are sometimes used so that one load can control multiple
      other loads, or multiple relays may be arranged as crude logic
      circuits, and are essentially the foundation of our computer
      circuit boards,


Best regards,
 Bill L.                           mailto:pythias at pacifier.com
 
 '66 Sprite MKIII HAN8L49403   "the red thing"
 
  Dentist : he lives from hand to mouth. 
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