July 24, 20224 yr Hello Quick question, when doing the Volt Drop of the PV cable, is it the same formula for A.C. such as the mVAm formula ?
July 24, 20224 yr Hi To answer your question. The resistance in ohms in the cable is the same for ac or dc voltage/amps running in the cable. Resistance in a cable is usually measured as resistance (ohms) per meter. So the formula is the same for dc and dc. If you buy the correct cable for an installation the volt drop over the length of the cable should be neglectable. A wrong cable (a cable that cannot handle the amps) will get hot and have a large volt drop and also can be dangerous if it melts the insulation. Edited July 24, 20224 yr by Peter Topp
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