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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: Earthing Amp
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Fri, 11 June 2004 08:27
 
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To put it simply:
It is best to use the same sized cable for the power and earth because essentially what goes in eventually goes out
Preferably fuse the power cable at about 5-10A more than your amp because:
The fuse on the power cable is mainly to stop the cable causing a fire hazard should it ever short on the firewall or whatever. You can more than safely get away with using a fuse or circuit breaker rated at a similar current to your cable...
OR
you could take advantage of the situation and use it to double fuse your amp aswell...
Locate your ground as close to the amp as possible... possible being the operative word.
The main reason to go as close as possible is because if you run the cable back through the firewall you now have two high current cables that could short on the firewall.
Also the shorter the length of cable the lower the resistance (read: the better the earth / connection)
I think I should stop typing now as this was supposed to be the simple explanation...
1. Use the same power cable as you use for earth
2. Fuse the power cable as close to the battery as possible with a fuse rated at say 5-10A greater than the amp
3. Place the ground as close to the amp as possible.
4. MAKE SURE YOUR CABLE IS RATED PROPERLY... 15A AUTO CABLE CAN NOT SAFELY POWER A 40A AMPLIFIER!
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