Yes, the earth lead does complete the circuit. It's a return path for the current which flows through the wiring and is just important as getting a good power connection. If you have a high resistance in your earth return then it will generate heat.corsalover said:Earth leads simply complete the circuit, and there is no heat generated what so ever.
so is a bad earth connection create high resistance? so if my amp heats up,does that mean i have a bad earth connection? doesnt current pass through my amp cretaing heat,hence the heatsink? im confused? i thought an amp was meant to get hot when used? my headunit one def does?! i will check after a long period of use for heat.If you have a high resistance in your earth return then it will generate heat.
If you wiring is rated correctly then there should be no problem but underrated wiring and bad earth connections are a fire hazard with that kind of current passing through them.
johnny 5 said:i just installed my amp right, and also grouonded the earth under the seat bolts. they are a right ass to get under. anyway,i found the official grounding point, its near the seat bolts,but under the carpet under the back seats. i only found this after i bloody mounted my earth! :x probably a better mounting point,as it must be paint free.
Anyway,how the f**k did u all get ur power lead through to the battery? i tried squeezing it through the existing grommet behind the glovebox like some of u have claimed to have done, but i couldnt get mine to fit. :? :x i just cut the grommet in half, making it fit better and whack sh*t loads of vaseline ontop to seal out the water. gay. :x