If an electrical device is double-insulated, must it be connected to an equipment grounding conductor?

Double-insulated devices are designed with two layers of insulation to protect against electrical shock, eliminating the need for a separate grounding connection. This design effectively isolates live parts from any exposed metal parts, which means that even if a fault occurs, the risk of electric shock is significantly reduced.

The absence of a metal casing on double-insulated devices further reinforces this safety feature, as there is typically no path for electrical current to travel that could create a hazard to the user. Because of this inherent safety mechanism, grounding is not required for these types of devices under normal operating conditions.

In contrast, grounding conductors are typically utilized for devices that rely on a direct earth connection to protect users from electric shock, making the distinction vital for safety protocols and compliance with electrical codes.