What type of extension cord should be used when installing additional lighting in the hoistway?

Using a three-wire extension cord is essential for safety and functionality, especially in environments like hoistways. A three-wire cord includes a hot wire, a neutral wire, and a ground wire, which provides a safer electrical installation. The ground wire is critical for preventing electrical shocks and protecting against faults that could lead to dangerous situations, particularly in commercial or industrial settings where heavy equipment and machinery operate.

In hoistway areas, where there may be exposure to various environmental elements and potential hazards, having a grounded cord is particularly important as it helps ensure that the lighting remains functional and safe. This type of cord also supports higher power loads, which is often necessary for additional lighting setups.

Other options may not provide the level of safety required. A two-wire extension lacks a ground, making it less safe for use in potentially high-risk environments. A heavy-duty extension cord may suggest better construction to handle higher loads but does not inherently guarantee a ground connection unless it is also a three-wire type. Low-voltage cable is designed for specific low-voltage applications and is not suited for standard AC lighting in these scenarios. Therefore, a three-wire extension cord is the most appropriate choice for this installation.