OSHA's extension cord safety standards aim to prevent fire, shock, and tripping hazards by ensuring cords are used only for temporary power and remain in good physical condition.  Core Usage Rules No Permanent Wiring: Extension cords must not be used as a substitute for fixed wiring. They are meant for temporary tasks only. Prohibit "Daisy-Chaining": Plugging multiple extension cords or power strips together is a violation of OSHA standard 29 CFR 1910.303(b)(2). This practice can cause overheating and bypass overcurrent protection. Correct Rating: Ensure the cord’s amperage and voltage... Show more

OSHA's extension cord safety standards aim to prevent fire, shock, and tripping hazards by ensuring cords are used only for temporary power and remain in good physical condition. 

Core Usage Rules
No Permanent Wiring: Extension cords must not be used as a substitute for fixed wiring. They are meant for temporary tasks only.
Prohibit "Daisy-Chaining": Plugging multiple extension cords or power strips together is a violation of OSHA standard 29 CFR 1910.303(b)(2). This practice can cause overheating and bypass overcurrent protection.
Correct Rating: Ensure the cord’s amperage and voltage ratings match the tool being powered. Using a cord with an inadequate gauge can lead to a dangerous voltage drop and fire.
Environmental Suitability: Only use cords marked with a "W" (e.g., SJTW) for outdoor or wet environments. 

Safe Routing and Placement 
To avoid damage and injury, OSHA prohibits running cords through: 
Structural Openings: Holes in walls, ceilings, or floors.
Doorways or Windows: These can pinch the cord, damaging the internal insulation.
Concealed Areas: Do not run cords under rugs, carpets, or furniture where heat cannot dissipate. 

Daily Inspection Checklist
Inspect cords before every use and remove them from service if any of these defects are found: 

Damaged Insulation: Look for cuts, fraying, abrasions, or exposed internal wires.
Tape Repairs: Electrical or duct tape is not an acceptable fix for cord damage; the entire cord must be replaced.
Missing Ground Prong: Three-wire cords must have the ground prong intact. Never remove or bypass it.
Strain Relief: Ensure the cord is securely attached to the plug and socket with no internal wire stress visible.
Heat Signs: Discard any cord that feels hot to the touch or shows burn marks. 

Protection and Grounding
GFCIs: Use Ground-Fault Circuit Interrupters (GFCIs) on all extension cords used in construction, wet locations, or near water.
Proper Fastening: Never secure cords with metal staples or nails, as these can easily pierce the insulation.
Traffic Protection: If cords must cross a walkway, use a Heavy-Duty Cord Protector or ramp to prevent tripping and physical damage from vehicles or foot traffic. 

Show less