Except for the purpose of cleaning or making repairs or other adjustments, all electrical wiring in booths or room booths shall be of a permanent character. Portable lamps shall be incased in vapor-proof globes with suitable mechanical guards. Permanent electrical wiring in booths or room booths shall be installed in rigid or flexible metal conduits or raceways. All wiring within 30 feet of the face of the booth, in rooms in which booths are located, shall be installed in rigid or flexible metal conduits or raceways.
34 Pa. Code § 35.112