CONDUCTORS (Thermal class H)
The conductors used are made from electrolytic copper wire or strip, coated with modified polyesterimid or with 2 sheets of Nomex insulator. For currents greater than 200A, either soft annealed electrolytic copper or soft annealed electrolytic aluminum strip may be used.

MAGNETIC CORE (Thermal class C)
The magnetic cores are made exclusively from top-grade oriented-grain magnetic strip (Terni M6T35 or better), with controlled and guaranteed magnetic properties. For special components, C cores are used.
INSULATION (Thermal class H)
Insulation inside the winding is made exclusively from aramid paper (NOMEX T410). Insulation outside the winding is made exclusively from polyester or epoxy glass.
RESINS (Thermal class H)
The impregnation process calls for the use of unsaturated polyester resin which is flexible, fungus resistant, mold resistant, condensation resistant, conforms to tropicalization and provides protection also in acid and saline environments. Special applications may provide for the use of epoxy resins.
TERMINALS (Thermal class H)
Terminals are made according to currents and conductors, as follows:
- Terminal in tin-plated copper, crimped and soldered to the output conductor and secured to a polyester glass base with screws of adequate diameter. - Aluminum or copper bars (mainly for strip conductors and high currents) with holes for abutting another bar or terminal. - CUPONAL bars for aluminum windings with copper external connections;
this material eliminates problems connected with electronic exchanges between different materials.
ARMATURES
Armatures are made exclusively from FE 37 or nonmagnetic stainless steel.