National Standard Distribution Box Flexible Cord
400 – Flexible Cords and Flexible Cables
Revisions were made to 400.12 to include “flexible cords” in the “Uses Not Permitted” section along with flexible cables, cord sets, and power supply cords. 400.12 Uses Not Permitted. (Flexible Cords and
400.7 Flexible Cords and Cables. Uses Permitted.
In the 2014 NEC ®, Section 400.7 (11) allows a flexible cord to be run between an existing receptacle outlet and an inlet, where the inlet provides power to an additional single receptacle outlet.
29 CFR 1926.405 -
The National Electrical Code, ANSI/NFPA 70, in Article 400, Table 400-4, lists various types of flexible cords, some of which are noted as being designed for hard or extra-hard usage.
When Are Extension Cords Allowed by the NEC?
The NEC also forbids running flexible cords through doorways or windows, as this damages the cord and compromises fire separation barriers. Flexible cords lack the mechanical
Flexible Cords, Cables and Fixture Wire | EC&M
Always remember that the rules for flexible cords and cables are in Art. 400 and fixture wires are covered by Art. 402, then start by using the tables in these articles for application and
Flexible Cords and Fixture Wires, based on the 2023 NEC
Flexible cords with conductor stranding other than Class B or C require the use of terminations specifically identified for the stranding in the flexible cord or cable [110.14].
Explaining NEC Article 400 on Flexible Cords and Cables
NEC Article 400 covers flexible cord types, allowed and prohibited uses, installation rules, and ampacity limits.
1926.405
Flexible cords shall be connected to devices and fittings so that strain relief is provided which will prevent pull from being directly transmitted to joints or terminal screws.
NEC Article 400: Flexible Cords and Flexible Cables (Sections 400.1
This section covers the use, installation, and construction specifications for flexible cords and flexible cables, including their connection to equipment and their use in various environments.
Flexible Cord, Extension Cord, and Power Strip Requirements
This section covers the use of flexible cord as a wiring method and cord-and-plug assemblies that provide AC power for machines, laboratory equipment, and other scientific research equipment.
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