normally closed switch to activate relay?

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Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=47935
Printed Date: May 10, 2025 at 9:38 AM

Topic: normally closed switch to activate relay?

Posted By: moto-x
Subject: normally closed switch to activate relay?
Date Posted: January 17, 2005 at 1:41 PM

i have a normally closed switch that iam married to that needs to activate a regular bosch relay that iam using in a starting ciruit. Is there any way to do this? I normally just run power through a normally open switch but on this project iam married to this normally closed switch. please help thanks,

Replies:

Posted By: hotwaterwizard
Date Posted: January 19, 2005 at 12:55 AM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: hotwaterwizard
Date Posted: January 19, 2005 at 1:01 AM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: hotwaterwizard
Date Posted: January 19, 2005 at 1:07 AM

The problem with the Momentary is that when you kill the power to the relay it will try to start the car. This is why you need to hook it to the key switch for the power source. A toggle switch would work to kill the power if the Key switch is no good.

Happy Honeymoon

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

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