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Significant Proposals for 2005 NEC Part IX

As Reviewed by Mike Holt

The following text is a quick summary of the proposed changes for the 2005 NEC. This document is a work in progress and many will be changed by the Code panel over the next few months. Some of these you might find important to your work and you might want to follow their progress with me. Therefore, each week I will email you a few of these changes.

Each proposed change has a Report on Proposal (ROP) number, like 1-25. This number reflects the Proposal Number and all action on this proposal can be viewed in the following
PDF document NEC Part 3 [ 4.5MB ].

As always, I am looking to improve our products, so if you feel you have anything to contribute, please let me know at

Chapter 4 Equipment for General Use

Article 400 Flexible Cords and Cables

400.7 Uses Permitted.
(C) Attachment Plug and Multi-Outlet Receptacle Assembly.
New Rule added to clarify that a multi-outlet receptacle assembly can be used where a receptacle is required for a flexible cord that is equipped with an attachment plug.

400.8 Uses Not Permitted.
(4) Where attached to building surfaces. Exception No. 4 revised to permit a flexible cord from a tension take-up device to be attachment to the building surface.

400.8 Uses Not Permitted.
(7) Where subject to physical damage. New requirement makes it clear when the use of a flexible cord is not permitted.

400.14 Protection from Damage.
New paragraph permits protected flexible cords and cables in industrial environments (of any length) in lieu of requiring a permanent wiring method, but only under restricted conditions.

Author's Comment: Many industrial occupancies have unique installation requirements that would benefit from the usage of longer flexible cords. These occupancies must have qualified individuals who will see that the cords are suitable protected from damage.

Article 404 Switches

404.8 Accessibility and Grouping.
(B) Voltage Between Adjacent Devices. New sentence addresses the 300V limitation between adjacent terminals on the same device by prohibiting a multipole switch from being fed from more than a single circuit.

404.9 Provisions for General-Use Snap Switches.
(B) Grounding (Bonding).
(1) Metal Box. Revised text requires a more secure connection between a metal box and the yoke of a switch. The change requires the connection between the switch yoke and a metal box to be more dependable than just a pair of screws

Article 406 Receptacles, Cord Connectors, and Attachment Plugs

406.4 Receptacle Mounting.
Text added to recognize that receptacles mounted in boxes supplied by a flexible cord are not required to be securely fastened in place.

18-27 and 18-28
406.6 Attachment Plugs, Cord Connectors, and Flanged Surface Devices.
New Rule to address flanged inlets used for plugs and cord connectors.

Author's Comment: The usage of flanged inlets, such as those used on computers, transfer switches, etc. for detachable power cords is increasing, but the inlets were not been previously addressed by name in the NEC.

406.6 Attachment Plugs, Cord Connectors, and Flanged Surface Devices.
(D) Flanged Surface Inlet. This change treats the newly added flanged outlet the same as an attachment plug, by requiring that exposed parts be non-energized.

406.8 Receptacles in Damp or Wet Locations.
(C) Bathtub and Shower Space. Revise the wording of this subsection to identify the locations where a receptacle is not allowed with reference to a bathtub of shower stall.

406.8 Receptacles in Damp or Wet Locations.
(E) Flush Mounting with Faceplate. The requirement that an enclosure for a receptacle be made weatherproof by providing a watertight connection between the plate and the finished surface was expanded to include surfaces other than walls

Article 410 Luminaires

410.4 Luminaires (Fixtures) in Specific Locations.
(D) Bathtub and Shower Areas. The text was modified to clarify the types of luminaires not permitted within 3 ft horizontally and 8 ft vertically from the top of the bathtub rim or shower stall.

410.4 Luminaires (Fixtures) in Specific Locations.
(E) Luminaires (Fixtures) in Indoor Sports, Mixed-Use, and All-Purpose Facilities. New subsection added to clarify when a UV shield is required for HID luminaires.

410.14 Connection of Electric-Discharge Luminaires.
(B) Access to Boxes. Clarify what is required to be accessible when electric-discharge luminaires are surface mounted over concealed outlet boxes.

410.15 Supports.
(B) Metal or Nonmetallic Poles Supporting Luminaires. Change recognizes the use of nonmetallic poles for the support of luminaries.

Author's Comment: The 2002 NEC only addressed metal poles to be used for the support of luminaires.

410.18 Exposed Luminaire Parts.
(B) Made of Insulating Material. New exception clarifies the conditions when conductive luminaires can be installed as replacements where no equipment grounding (bonding) conductor is present in the outlet box.

Author's Comment: This is similar to the rule for receptacle replacements in locations where an equipment grounding (bonding) conductor is not present in the outlet box [406.3(D)(3)].

410.30 Cord-Connected Lampholders and Luminaries.
(C) Electric-Discharge Luminaires.
(1) Cord connection. Additional text clarifies when flexible cords, with manufactured wiring system connectors, can be used for the installation of electric-discharge luminaires [604.6(A)(3)].

410.66 Clearance and Installation.
(B) Installation. New requirement address the installation of recessed Non-Type IC luminaires where insulation is required or planned.

Author's Comment: This revision places the responsibility for maintaining luminaires-to-insulation clearance on the electrical installer for recessed Non-Type IC luminaires.

410.73 General.
(F) High-Intensity Discharge Luminaires (Fixtures).
(5) Metal Halide Lamp Containment. New rule specifies when luminaries with metal halide lamp are to be provided with a method to help contain the arc at end-of-life arc-tube failures.

Author's Comment: Fires have resulted from the spillage of hot arc tube particles in the event of lamp explosion or failure.

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