A lot of alloys, shapes, base and top coatings are technically feasible.

Some examples:

• Silver wire coated with copper
• Aluminium wire coated with copper
• Double wire, Litz wire, stranded wires and braids
• Bronze wire coated with Manganin
• Nylon wire wrapped with copper
• Coloured Ag/Copper wire
• Copper wire with ceramic insulation
• Cables: KY, KW and KZ, PTFE isolated, TZ, WCP, co-axial
• Tubes isolated with Kapton ®, PTFE
• Polyurethane and glass fibre sheaths