MD motor disconnect switches are listed UL 508 Suitable for Motor Control (UL File E164864) and conforms to IEC standard 60947 3. It is in a compact NEMA 4X enclosure suitable for use in NEMA 1, 3, 3R, 4, 4X, and 12 applications. This is a 30 A adder power pole for the MD3304X and MD3604X motor disconnect switch. Power pole is UL listed and CSA certified.