Which type of extension cord is prohibited by OSHA on a jobsite?

The correct answer is that indoor rated cords are prohibited by OSHA on a jobsite. This is primarily because indoor rated extension cords are not designed to withstand the rigorous conditions often present on construction sites. These conditions include exposure to moisture, environmental hazards, and the potential for physical damage, which can significantly increase the risk of electrical hazards.

Indoor-rated cords typically have less durable insulation and are often not equipped to handle wet or outdoor environments, making them unsuitable for heavy-duty, outdoor use. On a jobsite, where safety is paramount and the likelihood of exposure to challenging conditions is high, using extension cords that meet specific safety standards is crucial. OSHA provides guidelines to ensure that equipment used on construction sites is appropriate and minimizes risks, which is why the use of indoor-rated cords is prohibited in these settings.