Full Technical Description: Mechanically Interlocked Type; Natural Copper Free Aluminum Material; 600 VAC Voltage Rating; 100 Ampere Current Rating; 4 Pole(S); Dust Ignition Proof, Rain Tight; 1 1/2 Inch Hub Type; Spring Door; 2, Extra Pole Grounding Style; ARKTITE[R] Brand; Approval UL 698, UL 1010; DBR Model