The Occupational Safety and Health Administration (OSHA) calls extension cords “flexible cords,” though the terms refer to the same type of equipment. OSHA permits the use of flexible cords only in certain situations and when necessary. These situations are outlined below.
When Using Flexible Cords is Permitted
Under OSHA’s Subpart K standard, flexible power cords and cables used for portable lamps and plug-in construction tools may be run through walls, ceilings, floors, doorways, or other openings. However, protection must be provided to prevent damage at any pinch-points.
Other permitted use of flexible cords and cables, if necessary, is as follows:
- Pendants
- Wiring of fixtures
- Connection of portable lamps or appliances
- Elevator cables
- Wiring of cranes and hoists
- Connection of stationary equipment to facilitate their frequent interchange
- Prevention of the transmission of noise or vibration
- Appliances where the fastening means and mechanical connections are designed to permit removal for maintenance and repair
Before using flexible cords, it is vital to be aware of the following:
- Flexible cords should be visually inspected each day prior to use to look for external defects, insulation damage, and any indication of possible internal damage.
- Repair or replacement of the flexible cord is required when the outer jacket is penetrated or if the conductors or their insulation inside are damaged.
- Electrical tape should not be used to protect nicks or abrasions as it covers the damage and makes it impossible to visually inspect.
- Ground prongs may not be cut off or otherwise removed.
- Flexible cords found damaged or destructive must not be used until repaired. Tag the cord DO NOT USE.
Sources:
Occupational Safety and Health Administration. Flexible Cords. https://www.osha.gov/electrical/hazards/flexible-cords. Accessed September 22, 2026.
5-R-1362