What is a requirement for snap switches to be part of the effective ground-fault current path?

For snap switches to be part of the effective ground-fault current path, they must be connected to GFCI (Ground Fault Circuit Interrupter) outlets. This requirement is crucial because GFCI outlets are designed to protect against electrical shock by detecting ground faults and quickly cutting off electricity when an imbalance between the incoming and outgoing current is detected. By ensuring that snap switches are connected to these outlets, they enhance electrical safety and ensure that any ground fault current can be effectively managed within the circuit, thereby reducing the risk of electrocution and fire.

The connection to GFCI outlets essentially provides a protective measure that ensures any stray current is directed properly, enabling the system to function safely in environments where moisture or wet conditions might be present. This requirement helps maintain compliance with electrical safety codes that aim to limit hazardous conditions in electrical installations.