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ignition switch

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icubob(at)newnorth.net
Guest

Posted: Wed Jul 02, 2008 10:37 am Post subject: ignition switch

hi all,

  for installation of the acs a-510-2 ignition  switch, which is the basic on, off, mag 1, mag 2 etc. switch, instructions say  to use shielded wire on all connections. is there potential noise that shielded  wire may prevent with all these wires?

        thanks, bob  noffs

    [quote][b]

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nuckolls.bob(at)cox.net
Guest

Posted: Wed Jul 02, 2008 11:54 am Post subject: ignition switch

At 01:22 PM 7/2/2008 -0500, you wrote:

 	  Quote: 	
		  hi all,

  for installation of the acs a-510-2 ignition switch, which is the basic 

 on, off, mag 1, mag 2 etc. switch, instructions say to use shielded wire 

 on all connections. is there potential noise that shielded wire may 

 prevent with all these wires?

        thanks, bob noffs


	




     When in doubt . . . or don't KNOW, then shield everything.

     When you KNOW that the p-leads are the only potential sources

     for electro-statically coupled noise, then those are the

     only wires that get shields. It's also a good idea to use the shields

     AS the ground return for the mag switch and ground the shields

     at the engine-end only. This will prevent one of the most common

     ground-loop problems with respect to ignition noise and a less-common

     but expensive situation where a missing ground jumper between

     crankcase and airframe is missing or broken. Attempting to

     start the engine burns the p-leads and any other wires that

     are bundled with the p-leads.



     Even if you're installing a Shower-of-Sparks system, the

     additional wires associated with SOS are not connected to

     p-leads of a running engine and therefore are not potential

     emitters of noise.



     See the Z-figures for exemplar wiring recommendations for

     the ACS-510 series switches.



     Bob . . .

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icubob(at)newnorth.net
Guest

Posted: Thu Jul 03, 2008 5:05 am Post subject: ignition switch

hi bob,

  thanks for the wiring info. i looked in your  book but didnt look far enough. shielded wire is on order.

  bob noffs

    [quote][b]

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