What type of cords does OSHA require for extension cords?

OSHA requires the use of 3-wire grounded cords for extension cords in work environments to ensure safety. A 3-wire grounded cord includes a hot wire, a neutral wire, and a ground wire, which plays a crucial role in preventing electrical shock and ensuring proper operation of electrical equipment. The presence of the ground wire provides a safe path for electricity to dissipate in the event of a fault, reducing the risk of electrical hazards.

Using 3-wire cords is particularly important in settings where equipment might be exposed to moisture or where workers could be in physical contact with conductive surfaces, heightening the risk of shock. Grounding helps to safeguard workers by minimizing the potential for electrical shock during use.

In contrast, 2-wire grounded cords lack the additional grounding component, while 4-wire ungrounded cords are not necessary for standard applications and may not meet safety requirements. All-weather extension cords, while useful for external conditions, do not inherently meet the grounding requirements that OSHA emphasizes for workplace safety.