NEC Article 406 outlines the requirements for the installation and use of receptacles, cord connectors, and attachment plugs (caps). This article ensures these components are used safely and effectively in various electrical installations. Here is a detailed overview of NEC Article 406:

406.1 Scope

This section covers the general requirements for receptacles, cord connectors, and attachment plugs, ensuring they are properly used in electrical systems.

406.2 Definitions

Defines key terms used in the article to ensure clarity and consistency, such as “receptacle,” “cord connector,” and “attachment plug (cap).”

406.3 General Installation Requirements

Specifies the general requirements for the installation of receptacles, including:

• 406.3(A) Listing: Receptacles, cord connectors, and attachment plugs must be listed.
• 406.3(B) Installation: These devices must be installed in accordance with their listing and the NEC requirements.
• 406.3(C) Grounding: Requires proper grounding for all receptacles to ensure safety.
• 406.3(D) Receptacles for Replacement: Details the requirements for replacing non-grounding-type receptacles with grounding-type or GFCI-type receptacles.

406.4 General Installation Requirements (Continued)

• 406.4(D)(2) Non-Grounding-Type Receptacles: When replacing non-grounding-type receptacles, several options are available, including using a GFCI-type receptacle and marking it with “No Equipment Ground” if an equipment grounding conductor is not present.
• 406.4(G) Protecting Floor Receptacles: Floor receptacles must be protected from physical damage and, in certain locations such as food courts and transportation facilities, must be GFCI protected to prevent electric shock due to spillage.

406.5 Receptacle Mounting

Details the requirements for mounting receptacles to ensure they are securely installed and accessible.

406.9 Receptacles in Damp or Wet Locations

Specifies requirements for receptacles installed in damp or wet locations to prevent moisture ingress and ensure safety. This includes using weatherproof enclosures and covers.

406.12 Tamper-Resistant Receptacles

Expands the locations where tamper-resistant (TR) receptacles are required, including:

• Dwelling units, boathouses, mobile homes, and manufactured homes.
• Guest rooms and suites in hotels and motels.
• Child care facilities, preschools, and education facilities.
• Clinics, medical and dental offices, and outpatient facilities.
• Nursing homes, limited care facilities, residential care facilities, and other similar settings.
• Agricultural buildings accessible to the public.

For detailed information and specific requirements, consulting the NEC Handbook and additional resources provided by the NFPA is highly recommended. More insights can be found on resources like Electrical License Renewal and Captain Code 2023.