S-2.1, r. 4 - Safety Code for the construction industry

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3.14.6. The chassis or hood of a welding machine supplied by a public power utility shall be grounded in accordance with CSA Standard C22.10-1992 Canadian Electrical Code, Part I (16th Edition) plus the Québec Amendments (O.C. 1674-91, 91-12-04), and any future provision amending it.
O.C. 1413-98, s. 23.