Powering and grounding relays

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mears

Member - Posts: 31

Joined: June 14, 2004

Posted: June 21, 2004 at 8:23 AM / IP Logged

Also, how do you guys bring positive 12V to your relays and do you use 40A fuses to protect the wire going to #30? Do you run a wire all the way from the battery? Also, where do you ground? I don't want to just ground wherever I have the relays mounted because I don't want to introduce ground loops from having multiple ground points.

draasch

Gold - Posts: 2,172

Joined: February 07, 2003

Location: Florida, United States

Posted: June 21, 2004 at 10:46 AM / IP Logged

what are you looking to do with the relays???????????????

Good Luck

David

Ace Security

813-376-9778

Tampa

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mears

Member - Posts: 31

Joined: June 14, 2004

Posted: June 21, 2004 at 11:17 AM / IP Logged

Door locks, powering fans, and switches.

draasch

Gold - Posts: 2,172

Joined: February 07, 2003

Location: Florida, United States

Posted: June 21, 2004 at 12:01 PM / IP Logged

you will need a 30 or 40 amp fuse....most items will work off 10 -20 amp fuse...

Good Luck

David

Ace Security

813-376-9778

Tampa

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mears

Member - Posts: 31

Joined: June 14, 2004

Posted: June 21, 2004 at 12:09 PM / IP Logged

Ok, what about getting +12V to relay and ground points.

draasch

Gold - Posts: 2,172

Joined: February 07, 2003

Location: Florida, United States

Posted: June 21, 2004 at 4:29 PM / IP Logged

i need to correct my post.....i was typing toooooo fast...

that should read:

you will not need a 30 or 40 amp fuse....most items will work off 10 -20 amp fuse...

Good Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

draasch

Gold - Posts: 2,172

Joined: February 07, 2003

Location: Florida, United States

Posted: June 21, 2004 at 4:32 PM / IP Logged

you can ground to any part of metal under the dash.....depending on what kind of car, you may have some empty spots in the fuse box.....if not you can use the 12v wire on the ign. harness

Good Luck

David

Ace Security

813-376-9778

Tampa

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mears

Member - Posts: 31

Joined: June 14, 2004

Posted: June 21, 2004 at 5:16 PM / IP Logged

bobk:

http://www.epanorama.net/documents/groundloop/basics.html

mears

Member - Posts: 31

Joined: June 14, 2004

Posted: June 25, 2004 at 12:17 PM / IP Logged

They are all ground to the chasis, but different ground points can have varying resistances, which can cause a ground loop. Also, varying lengths of wire can cause loops.

ka3vvv

Copper - Posts: 47

Joined: April 30, 2004

Location: United States

Posted: June 26, 2004 at 2:02 AM / IP Logged

what are you trying to do

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Powering and grounding relays

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