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406.9(B)(1) Receptacles in Damp or Wet Locations

Revision

Change Summary

  • New provisions allowing “other listed products,” enclosures, or assemblies providing weatherproof protection that do not utilize an outlet box hood need not be marked “extra duty” as required for the outlet box hoods.
NEC® Text

406.9 Receptacles in Damp or Wet Locations.
(B) Wet Locations.
(1) Receptacles of 15 and 20 Amperes in a Wet Location.
Receptacles of 15- and 20-amperes, 125- and 250-volts installed in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted. An outlet box hood installed for this purpose shall be listed and shall be identified as “extra duty.” Other listed products, enclosures, or assemblies providing weatherproof protection that do not utilize an outlet box hood need not be marked “extra duty.”

Informational Note No. 1: Requirements for extra-duty outlet box hoods are found in ANSI/UL 514D-2000 2013, Cover Plates for Flush Mounted Wiring Devices. “Extra duty” identification and requirements are not applicable to listed receptacles, faceplates, outlet boxes, enclosures, or assemblies that are identified as either being suitable for wet locations or rated as one of the outdoor enclosure–type numbers of Table 110.28 that does not utilize an outlet box hood.

Exception: 15- and 20-ampere, 125- through 250-volt receptacles installed in a wet location and subject to routine high-pressure spray washing shall be permitted to have an enclosure that is weatherproof when the attachment plug is removed.

All 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles shall be listed and so identified as the weather-resistant type. 

Informational Note No. 2: The types configuration of weather-resistant receptacles covered by this requirement are identified as 5-15, 5-20, 6-15, and 6-20 in ANSI/NEMA WD 6-2002 6-2012,Standard for Dimensions of Attachment Plugs and ReceptaclesWiring Devices — Dimensional Specifications.

Copyright© 2016 National Fire Protection Association
(See NEC for complete text)

Expert Analysis

For the 2017 NEC, in an effort to remedy confusion or misapplication, 406.9(B)(1) was once again revised by adding an extra sentence to indicate that other listed products, enclosures, or assemblies providing weatherproof protection that do not utilize an outlet box hood need not be marked “extra duty.” Language was also added to a 406.9(B)(1) informational note that further stresses the fact that “extra duty” identification and requirements are not applicable to listed receptacles, faceplates, outlet boxes, enclosures, or assemblies that are identified as either being suitable for wet locations or rated as one of the outdoor enclosure-type numbers of Table 110.28 (Enclosure Selection) that does not utilize an outlet box hood. Table 110.28 is used for selecting enclosures for use in specific locations (such as a damp or wet location) other than hazardous (classified) locations.

Other housekeeping revisions occurred with 406.9(B) (1) to make sure the informational notes and exception “immediately follow the main rule to which they apply” for compliance with the NEC Style Manual.

Leviton Extra Duty While-in-Use Covers

Built to withstand the elements and tough enough to comply with 406.9(B)(1) for “Extra-Duty”

  • Accommodates Decora® GFCI devices. Adapter plates are included for duplex and single receptacles
  • Heavy-duty gasket protects from moisture and adds to ease of installation
  • Includes two inserts to cover cord openings to prevent insects and debris from entering the cover
  • Safety lock feature

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