is it possible to get the 30 /40amps

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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=112195
Printed Date: July 17, 2025 at 8:05 PM

Topic: is it possible to get the 30 /40amps

Posted By: craiger13
Subject: is it possible to get the 30 /40amps
Date Posted: March 08, 2009 at 4:27 AM

constant, or are the relays just designed for a single pulse or short-term power. I'm trying to figure out if there is any way to actually use thinner gauge wire (say 18) and still get the full 30 amps available from the relay capacity... AM I LIMITED BY what I put to 30 or 86/87? (which is the limiting factor?)

thanks for any help.... (I trying to power an AMP without having to use 8 or 10 gauge running minimal thick-gauge wire)...

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-"Don't wish for less challenges, wish for more skill" -Jim Rohn

Replies:

Posted By: KPierson
Date Posted: March 08, 2009 at 9:14 AM

They are designed (and rated) for continous use.

However, if you are pulling 30A of current through a relay you will need the same size wire you would need if you were pulling 30A straight from the battery. The relay won't allow smaller wire to magically be able to carry more current.

If you tried to pull 30A through an 18awg wire I would think that would lead to a nice little fire.

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Kevin Pierson

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