![]() Now, how much copper do you need to achieve the same resistance? For 4 meters The loss of power in watts is 0.145 watts, compared to 750 watts. This is a problem? I don't think it is a problem. For a current of 63Īmperes, it's 0.0023063 volt drop. Ohm/m, and for 4 meter long object it's 3.6608e-5 ohm. This means the resistance of 0.015625 m2 cross section is 9.1520e-6 ![]() The electrical resistivity of carbon steel (NOT stainless steel) is 1.43e-7 If it weighs 500 kg (I assume a carĬhassis weighs 500 kg, correct me if this is incorrect), its volume for densityĨ000 kg/m3 (different types of steel have different density, but 8000 kg/m3 is a rough approximation) is is 0.0625 m3 and its cross sectional area is then 0.015625 m2. 750 watts is slightly less than 63 amperes.
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