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Contactor Polarity

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longg(at)pjm.com
Guest

Posted: Fri Jan 16, 2009 5:57 am Post subject: Contactor Polarity

I think this question was raised last week, but I could not find it via the search engine.  

   

For appearances I am planning to mount my contactors (3), ANL’s, SD-8 capacitor/relay on a sheet of glossy carbon fiber bolted to the firewall. To make it look good it will require the contactors be properly arranged on  the board. Does polarity (primary lugs) matter on the B & C contactors? I have both momentary and constant.  

   

Thanks,  

Glenn  

      [quote][b]

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rampil

Joined: 04 May 2007
Posts: 870

Posted: Fri Jan 16, 2009 6:38 am Post subject: Re: Contactor Polarity

Glenn,



Are you sure you want to use carbon fiber??



It is a conductor, but not good enough to serve as a common ground

in a power circuit. You might be chasing ground loops until the end of time,

unless you tie the things wanting to be connected together with thick

buss cable and isolate the mounts that should not be grounded.



Contactors should not have polarity in the power leads

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_________________
Ira N224XS

nuckolls.bob(at)aeroelect
Guest

Posted: Fri Jan 16, 2009 7:02 am Post subject: Contactor Polarity

At 07:55 AM 1/16/2009, you wrote:

 	  Quote: 	
		  I think this question was raised last week, but I could not find it 

via the search engine.



For appearances I am planning to mount my contactors (3), ANL's, 

SD-8 capacitor/relay on a sheet of glossy carbon fiber bolted to the 

firewall. To make it look good it will require the contactors be 

properly arranged on  the board. Does polarity (primary lugs) matter 

on the B & C contactors? I have both momentary and constant.


	


    No. The contactors themselves are not polarity critical,

    only the diodes you may have to put on the outside.

        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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longg(at)pjm.com
Guest

Posted: Fri Jan 16, 2009 8:37 am Post subject: Contactor Polarity

Bob,



So if I use the B & C jobs (they come with diodes), I will need to

switch them accordingly, yes?



Thanks

Do Not Archive

--

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