Simple Relay Question.

Printed From: the12volt.com
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=65246
Printed Date: May 14, 2025 at 1:26 PM

Topic: Simple Relay Question.

Posted By: stoneattic
Subject: Simple Relay Question.
Date Posted: October 29, 2005 at 2:15 PM

When using a relay to power something that draws higher current, in my case a compressor, should it be hooked up to open and close the +12V or the ground? Does it matter?

Replies:

Posted By: Hoptup32
Date Posted: October 29, 2005 at 6:21 PM

I would think in theory, it shouldn't matter if you used it for the +12V or the ground. But from a more practical standpoint, I think it would be safer to use the relay for the +12V source, especially for your intended use.

Posted By: stoneattic
Date Posted: October 29, 2005 at 7:53 PM

Thanks, for the response. I was thinking that functionally it shouldn't matter but I didn't really think about it from the safety aspect.

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