Machines mobiles automotrices non ferroviaires, à propulsion électrique, destinées à être utilisées dans les mines souterraines gazeuses ou non gazeuses

This standard applies to self-propelled, electrically-driven, non-rail-bound, mobile machines for use underground in gassy or non-gassy mines.  This standard provides requirements for such machines and is intended to be used in conjunction with CSA Standards M424.0, M424.1, M424.2, and M424.3, each as applicable.

This standard considers battery electric as the base system configuration.  Hydrogen fuel-cell-electric and diesel-electric systems are also considered as on-board sources of electrical energy supply and are addressed by this standard with additional specific requirements.  Additionally, other energy storage technologies are considered by this standard for application as possible sources for electric propulsion. 

This standard applies to those self-propelled machines using on-board voltages in the ranges of 50 V-1.5 kV AC at any frequency and 75 V-2.1 kV DC – including any repetition rate of pulsating DC.  Voltages contained within on-board devices are not considered in this standard.