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M421-11 (R2016) - Use of electricity in mines
Z275.3-09 (R2014) - Occupational safety code for work in compressed air environments
C22.1-12 - Canadian electrical code, part I (22nd edition), safety standard for electrical installations
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The mining industry in Canada is a world leader in technology, productivity, and health & safety practices. M421 establishes the minimum requirements for electrical work and electrical equipment operating in mines and quarries, and is intended for use with the requirements of the Canadian Electrical Code, Part I. Updated with the latest information and developments in electrical safety for mining, M421 is widely and extensively referenced and used.