The receptacle is de-energized with a suitable switch. The power cord does not exceed 3 feet length. The cord is extra hard usage or protected hard usage per NEC 400-4. The plug and receptacle are locking and grounding type. The receptacle has a warning against unplugging under load.
Unbroken conduit can pass through a classified area without seals.
501-5 a. Fittings and compound shall be approved by a recognized testing lab. No wire splicing in seal fittings. Cables that can transmit gasses shall be sealed at the Division 2 boundary. Process instruments shall have two seals to prevent gas from entering the conduit system. Leakage of the primary seal should be obvious.