Illinois Roofing Practice Exam

Which of the following extension cords does OSHA prohibit on a jobsite?

1. Rubber-coated cords.

2. Twist-locking cords.

3. Flat wire cords.

4. Heavy-duty outdoor cords.

The correct answer is: Flat wire cords.

The choice of flat wire cords as the prohibited type of extension cord on a jobsite aligns with OSHA's standards regarding safety and suitability for work environments. Flat wire cords typically lack the necessary durability and protection required for the rigorous conditions often found in construction sites. They can be more susceptible to damage, which increases the likelihood of electrical hazards such as shocks or fire. Rubber-coated cords, twist-locking cords, and heavy-duty outdoor cords are generally acceptable because they provide enhanced durability and stability, making them better suited for the various conditions encountered on a jobsite. Rubber-coated cords are typically weather-resistant, twist-locking cords prevent accidental disconnection, and heavy-duty outdoor cords are designed to handle greater electrical loads and exposure to outdoor conditions. These features are vital in maintaining safety and compliance with industry regulations, thereby reducing the risk of accidents and injuries.