Selling NYMHY Cable Low Prices from PT Supreme Power in Jakarta. NYMHY cable is a type of electrical cable that has a constriction consisting of a flexible copper wire conduit, with twisted rounded veins, insulated and PVC sheathed according to the new color and then coated again with a new layer of white as the outer skin or commonly referred to as fiber cables. This type of cable is widely used for electrical networks in homes and offices.