[Replace the first paragraph with the following] This standard applies to non-metallic enclosures with a volume not exceeding 1640 mL, or to parts of non-metallic enclosure designed for wiring devices with a rated voltage not exceeding not 750 V. [Add the following paragraph and note] This standard covers the safety of devices designed to be installed and used in accordance with the Canadian Electrical Code, Part I. Note. Manufacturers of products designed for use in Canada can find a summary of the device-related requirements of the Canadian Electrical Code, Part I, in CSA publication SPE-2000.