SQUARE D Interlock Plug 60 A 600 V AC 250 V DC 4-pole 3-wire 3-phase

Interlock Plug for Three-Phase Power

This interlock plug is built for industrial three-phase circuits where a secure, lockable connection is required. It carries a 60 A current rating and is rated for 600 V AC and 250 V DC. The four-pole, three-wire configuration suits standard three-phase loads. The grey metal housing meets CSA and UL safety listings for harsh environments.

Replacing Worn or Non-Locking Connectors

Use this plug to replace damaged or non-interlocking connectors on existing 60 A three-phase equipment. The upgrade is worth it when machinery demands a positive mechanical lock to prevent accidental disconnection under vibration. The Style 2 grounding arrangement matches legacy Square D receptacles already installed in many facilities. It does not serve single-phase or lower-voltage applications.

Behaviour Under Continuous Industrial Load

The metal housing and certified construction dissipate heat during sustained 60 A operation without deformation. Interlock mechanism engagement remains positive after repeated mating cycles in dusty or damp conditions. No reverse-service rating means the plug must be wired to the supply side only. CSA and UL listings confirm performance under continuous rated load.