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September 18th, 2005, 18:09
#1
Forum Junkie
wire loads
How much amperage can a 10 guage wire contain before the wire melts? I had a problem this weekend at the MORE race but I think it was actually the 20 amp switch that failed thus causing the wire to start to melt. The switch is for my dual elec. fans for my radiator. I am not running a relay cuz me and my friend do not like relays. I know some people say that you are supposed to run one but we are not. I am running 10 guage wire from the fans/fuse block to the switch. I replaced the 20 amp switch with a 50 amp one so that should solve it but I am wondering if their is now too much load on the wire. Sorry if my terms are not that correct I am not really great with electrical. Thanx.
Nikita Khrushchev said"We can't expect the American People to jump from Capitalism to Communism, but we can assist their elected leaders in giving them small doses of Socialism, until they awaken one day to find that they have Communism. "
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September 18th, 2005 18:09
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September 18th, 2005, 19:00
#2
Ace Mechanic
Re: wire loads
Originally Posted by
prerun4run
How much amperage can a 10 guage wire contain before the wire melts? I had a problem this weekend at the MORE race but I think it was actually the 20 amp switch that failed thus causing the wire to start to melt. The switch is for my dual elec. fans for my radiator. I am not running a relay cuz me and my friend do not like relays. I know some people say that you are supposed to run one but we are not. I am running 10 guage wire from the fans/fuse block to the switch. I replaced the 20 amp switch with a 50 amp one so that should solve it but I am wondering if their is now too much load on the wire. Sorry if my terms are not that correct I am not really great with electrical. Thanx.
30amps.... but if you have a direct short to ground yer screeewed.
Originally Posted by
Mark_Miller
what a dick
Originally Posted by
TT#54
Dicks.
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September 18th, 2005, 19:05
#3
Ace Mechanic
Re: wire loads
By the way...you and your friend might not like relays but they do isolate your circuits. Thus, preventing what happened to your switch. Your lucky you didn’t toast any other stuff.
Originally Posted by
Mark_Miller
what a dick
Originally Posted by
TT#54
Dicks.
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September 18th, 2005, 19:33
#4
Re: wire loads
Relays are the way to go on fans, most switches won't carry the load of a fan. 10 gauge is good as long as the run is not over 15 feet. Here is a chart that tells you all you need to know about wire size. Good Luck Jack
http://www.rbeelectronics.com/wtable.htm
"I would rather have a Gun and not need it, than need a Gun and not have it"
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September 18th, 2005, 20:31
#5
Forum Junkie
Re: wire loads
Thanx guys. Yeah if I do have a direct short to ground I guess I will be screwed. I am going to rewire the fans in the near future just need an open weekend to take out and rewire some of the wires in my 4runner. I am running the 50 amp switch so I do think I will be fine for a long time and the run isnt over 15 feet. I REALLY want to redo alot of the wiring but I am kinda electrically challenged but did just successfully attempt a dual battery setup with my buddy Matt's help. So what exactly does a relay do. How are they wired up? I have my dual Lightforce 240 Blitz's on a relay and that was my first wiring job not the prettiest but it still works!
Nikita Khrushchev said"We can't expect the American People to jump from Capitalism to Communism, but we can assist their elected leaders in giving them small doses of Socialism, until they awaken one day to find that they have Communism. "
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September 18th, 2005, 21:16
#6
Elite
Re: wire loads
In the simplest terms, a relay uses a small amount of current to switch a large amount of current. The small current goes through a coil, which creates a magnetic field. The field pulls on contacts to switch the high current.
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September 18th, 2005, 21:37
#7
Forum Junkie
Nikita Khrushchev said"We can't expect the American People to jump from Capitalism to Communism, but we can assist their elected leaders in giving them small doses of Socialism, until they awaken one day to find that they have Communism. "
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September 18th, 2005, 21:55
#8
Forum Junkie
Re: wire loads
Simple relay info:
www.r1200gs.info/ howto/relay.html
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September 21st, 2005, 08:21
#9
Forum Junkie
Re: wire loads
Anyone here use solid state relays??
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September 21st, 2005, 08:39
#10
Re: wire loads
I've got a couple, but have yet to use them. I like the no moving parts idea for the dirt. Those I have are not rated for DC current, but their AC rating is such that I don't forsee a problem.
On that wire gauge vs. current load vs. distance chart, note that if you have a ground wire that it too figures into the length.
TS
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