Join Date: Jun 2005
Location: Denver, CO
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Spec for GPs are .3 to .5 ohms. Since there are 8 in parallel, that's .037 to .0625 ohms. Using this range of resistance and ohms law to solve for current (i=e/r) assuming 12 volts, that's 12V/.037Ohms=324 Amps to 12V/.0625Ohms=192 Amps. To calculate the power in watts use (p=i*e), or 3888W to 2304W. In theory, the hotter the GP gets the higher its resistance becomes (less current draw). The difference in initial current draw between a 70F and -20F GP is minor when you consider an energized GP reaches about 2000F. Normally when GPs fail their resistance increases, so anything above .5 ohms is considered bad.
2011 F450 King Ranch, Royal Metallic Red, BW Turnover Hitch, Torklift Camper Tie Downs, Air Lift LoadLifter5000 Bags w/ WirelessAIR
Early 99 XLT F350 4X4 SuperCab Long Bed SRW
Mods: AIS Intake, BTS tranny, DP Tunner, Isspro A Pillar Trans Temp, Boost, Pre Turbo EGT, 19.5" Vision Heavy Hauler Wheels, Dunlop SP461 Tires, GTP38R Turbo, Non EBPV Turbo Pedestal, DI Intercooler, DI Uppies, DI HP Oil Cross-over, DI Regulated Fuel Return, BW Turnover Hitch, Rear Hellwig Stabilizer Bar, Rear Timbren Suspension, Moog Ball Joints, 2009 Al Rear Diff Cover, Banks 4" Monster Exhaust with Power Elbow, Torklift Camper Tie Downs, Tekonsha P3 Brake Controller