Corsa_Mel
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Registered: 15th Oct 01
Location: Sale, Greater Manchester
User status: Offline
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I've wired up an automotive 40amp relay. I have a 7.5amp fuse on the feedin and outs. After a few mins with the relay being switched on it gets warm to touch. Then it gets really hot.
Any ideas why? It can't be drawing too much current as I have the 7.5amp fuses in place 
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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I have a 120 amp relay and this gets fookin roasting, tis mounted in the engine bay so it dont bother me 
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Corsa_Mel
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Registered: 15th Oct 01
Location: Sale, Greater Manchester
User status: Offline
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120amp 
some sort of split charging going on there or something?
Im sure relays shouldn't get hot!! may be slightly warm after a while but not hot.
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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yup split charge
I dont know, any large piece of metal with current going through it is bound to get hot
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Corsa_Mel
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Registered: 15th Oct 01
Location: Sale, Greater Manchester
User status: Offline
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Not really... such as wire shouldn't get hot as it should be thick enough to handle the current, if not then its fire time.
A relay should work in the same way, the switching mechanism and coil should be able to easily withstand the current thus only a small resistance should occur not to be causing heat.
my thought anyhoo
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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Where is yours located?
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Corsa_Mel
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Registered: 15th Oct 01
Location: Sale, Greater Manchester
User status: Offline
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in the boot on an mdf floor
[Edited on 29-09-2003 by Corsa_Mel]
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