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ground power switch

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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Mon Jun 14, 2010 11:57 am Post subject: ground power switch

Just to make sure I understand the science as I add a ground power plug to my RV-10 project.



The panel switch to activate the ground power just needs to be a simple on/off switch that connects between the GP relay and aircraft ground and activates the relay by grounding it.  



Is that right, or am I off the reservation?



Also, to power ship's power from a ground power source, do both the GP switch and the main master switch both have to be on?



Thanks in advance.  Please excuse my neophyte questions.

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_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

nuckolls.bob(at)aeroelect
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Posted: Mon Jun 14, 2010 1:44 pm Post subject: ground power switch

At 02:57 PM 6/14/2010, you wrote:

 	  Quote: 	
		  



Just to make sure I understand the science as I add a ground power 

plug to my RV-10 project.



The panel switch to activate the ground power just needs to be a 

simple on/off switch that connects between the GP relay and aircraft 

ground and activates the relay by grounding it.


	


    Correct ONLY IF you do not plan to use

    crowbar OV protection lik4 pwge 4 of



http://www.aeroelectric.com/articles/grndpwr.pdf



    If the ov protection is included, then the

    'switch' must also be a circuit breaker.



    This can be a switch-breaker . . . or a

    simple push-pull, 5A breaker.



    If you don't have ov protection, then page

    5 applies and a simple switch suffices.

 	  Quote: 	
		  Also, to power ship's power from a ground power source, do both the 

GP switch and the main master switch both have to be on?


	


    If wired per the diagrams cited above, you can

    charge the ship's battery through ground power

    and leave the master off. But to crank the engine

    or run equipment for servicing on the ground,

    BOTH switches are ON.

   Bob . . .

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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Mon Jun 14, 2010 2:33 pm Post subject: Re: ground power switch

Thanks, it is starting to make more sense now.  I have been using your layout and do have the crowbar.

What I wasn't going to bother with was the indicator light, but I am re-thinking that.

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

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