1 Scope

1.1 This standard applies to metallic and nonmetallic cover plates and associated gaskets for flush-mounted wiring devices intended for installation in accordance with the National Electrical Code, ANSI/NFPA 70, the Canadian Electrical Code, Part I, CSA C22.1, and the General Requirements – Canadian Electrical Code, Part II, CSA C22.2 No. 0.

1.2 This standard also applies to outlet box hoods that are either integral or not integral with a cover plate for flush-mounted wiring devices.

1.3 This standard also applies to cover plates for flush-mounted wiring devices intended for use in marine applications in accordance with the applicable requirements of the United States Coast Guard and the Canadian Coast Guard; IEEE Recommended Practice for Electrical Installation on Shipboard, IEEE 45; the American Boat and Yacht Council; and the Standard for Pleasure and Commercial Motor Craft, NFPA 302.

1.4 This standard also applies to illuminating cover plates for flush-mounted wiring devices.

1.5 This standard does not apply to:

1. a) telephone wall plates;

2. b) cover plates and associated gaskets intended for use in hazardous (classified) locations as defined in the National Electrical Code, ANSI/NFPA 70, and the Canadian Electrical Code, Part I, CSA C22.1;

3. c) backplates, backplates intended to support live parts, or docking plates intended to support live parts;

4. d) box partition; or

5. e) cover plates or outlet box hoods intended to provide direct support of live parts, or parts that may become energized.

Summary of Topics

This new Third edition dated October 13, 2025 includes the following changes in requirements:

– Increase wire range from 14 – 12 AWG to 14 – 10 AWG to assure functionality with devices connected to 10 AWG Copper Clad wire: E.5.1.2, E.5.1.3, E.5.5.1, and E.5.5.3.

– Other miscellaneous revisions: 4.3, 5.1.5, 5.5.6, and Annex D.

– Miscellaneous editorial updates to align with current style.