283. A telephone connecting the surface to all the shaft stations and other levels used, including the loading hoppers, shall be installed in each underground mine.
The telephone bell may not be used as a conveyance calling device.
During shaft sinking work, the telephone shall be extended to the blasting set.
A telephone connection jack for the mine rescue teams shall be installed near each telephone station.
Each telephone connection jack must be inspected every 6 months. The inspections’ result must be recorded in a register.
O.C. 213-93, s. 283; O.C. 966-2015, s. 5.