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Boots on Battery Contactor.

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jack.byrne(at)bigpond.com
Guest

Posted: Thu Oct 19, 2006 1:09 pm Post subject: Boots on Battery Contactor.

Bob and Listers.



With reference to the discussion that has been going on re this subject.



My starter and battery contactor both came from B & C. The battery contactor

has boots the starter contactor does not. Got them 12 months ago.



I emailed B & C about the boots on the battery contactor and got the

following reply.

<<<<<<<<<<<<<<<<<

The S701-1 and S701-2 are the same basic contactor. The coil is isolated

from the case, therefore the case need not be grounded. Both coil leads are

brought out to their respective #10 studs on the side of the cylinder. Note

that the pre-wired S701-1 coil receives its power through the Red jumper

from the battery post, and its ground through the Master Switch (which is

connected to the other #10 stud).

 	  Quote: 	
		  >>>>>>>>>>>>>>>>>>>>>>>>>>


	


Now, if I knew how the switches worked I would have been able to see that

the wire from the Master switch was a GND wire and not a +12V wire.

Which is different than the starter contactor, the wire from the start

switch is +12V and the starter contactor gets its GND from the

airframe.(Z13-



So no need to grind the boots off the battery contactor



Maybe this will clear it up.

Chris Byrne

SYDNEY

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nuckollsr(at)cox.net
Guest

Posted: Sun Oct 22, 2006 7:38 am Post subject: Boots on Battery Contactor.

At 07:06 AM 10/20/2006 +1000, you wrote:



 	  Quote: 	
		  

<jack.byrne(at)bigpond.com>



Bob and Listers.



With reference to the discussion that has been going on re this subject.



My starter and battery contactor both came from B & C. The battery contactor

has boots the starter contactor does not. Got them 12 months ago.



I emailed B & C about the boots on the battery contactor and got the

following reply.

<<<<<<<<<<<<<<<<<

The S701-1 and S701-2 are the same basic contactor. The coil is isolated

from the case, therefore the case need not be grounded. Both coil leads are

brought out to their respective #10 studs on the side of the cylinder. Note

that the pre-wired S701-1 coil receives its power through the Red jumper

from the battery post, and its ground through the Master Switch (which is

connected to the other #10 stud).

 >>>>>>>>>>>>>>>>>>>>>>>>>>>



Now, if I knew how the switches worked I would have been able to see that

the wire from the Master switch was a GND wire and not a +12V wire.

Which is different than the starter contactor, the wire from the start

switch is +12V and the starter contactor gets its GND from the

airframe.(Z13-



So no need to grind the boots off the battery contactor



Maybe this will clear it up.


	


   Aha! I thought we were discussing the S702 STARTER contactor

   that MUST find a coil connection through the mounting feet.



   If the discussion is limited only to the battery and crossfeed

   contactors, then yes . . . the boots are not an electrical issue

   but it would still be interesting to know why they were added

   after about 75 years of successful service sans boots.



   Bob . . .



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

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

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

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