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#8 wire will take approximately 472 amps before the copper melts. The insulation on the other hand can not take that much amperage before heat in the copper wire begins to degrade/melt/burn the insulation. How much amperage is a function of the insulation type and the ability of the wire...

I chose 1 ohm for math simplicity (which I need by the way). Series and parallel resistances are calculated differently . Series resistances can just add.R total = R1 + R2 + R3 … Parallel resistance uses the formula:R parallel = 1 / (1/R1+1/R2+1/R3 … ) Identical resistors in parallel...

Warning Thread Drift Ahead Ohms law: E=IR So if we assume that the glow plugs parallel circuit is a 1 ohm series equivalent and then the firewall resistor is a 1 ohm resistance the we have 2 ohms total circuit resistance. E/R = I 24/2 = 12 amps If we eliminate the resistor and refeed the...