Copper
Soldered connectors
Windings
Electrical insulation
Electric conductors
Electrical components
Insulated wires
Wires
Polyamides
Electric wires
Link: BS EN 60317-56:2017 Specifications for particular types of winding wires Solderable fully insulated (FIW) zero-defect polyurethane enamelled round copper wire, class 180
Source: BSI Standards