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fan, relay and switch

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=110770
Printed Date: May 12, 2024 at 3:42 PM


Topic: fan, relay and switch

Posted By: ahliangjo
Subject: fan, relay and switch
Date Posted: January 18, 2009 at 11:13 AM

anyone able to help me? i am a newbie. i want to connect a fan with a relay n switch but not sure how to connect. below is the spec of the fan n relay.

Fan: DC12V, 0.37A, 4.5W

please let me know wat size of fuse and the connection of the relay to fan and the switch. Thanks




Replies:

Posted By: i am an idiot
Date Posted: January 18, 2009 at 11:22 AM
You do not need a relay for that fan. A 1 amp fuse and a 3 amp toggle switch should be fine for that. Simply connect the fuse to a 12 volt power source, connect one leg of the switch to the fuse. Connect the other leg of the switch to the red wire of the fan, ground the black wire of the fan.



Posted By: ahliangjo
Date Posted: January 19, 2009 at 9:29 AM

i am an idiot wrote:
You do not need a relay for that fan. A 1 amp fuse and a 3 amp toggle switch should be fine for that. Simply connect the fuse to a 12 volt power source, connect one leg of the switch to the fuse. Connect the other leg of the switch to the red wire of the fan, ground the black wire of the fan.

how do i know which fan to choose 4.5" 0.37A Fan or 3" 0.1A Fan. Which 1 is better? 




Posted By: i am an idiot
Date Posted: January 19, 2009 at 10:13 AM
What is the CFM rating of each fan?  What are you trying to cool?  I really need more info to answer that question, but neither would need a relay.


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