Can lamp holders of the screw-shell type be used for any purpose other than lamp holding?

Lamp holders of the screw-shell type are specifically designed and intended for the sole purpose of holding lamps and are generally not suitable for other applications. The National Electrical Code (NEC) dictates that these components have specific characteristics that make them appropriate for lamping service, including physical structure and electrical capacities tailored for that function.

Using these lamp holders for purposes outside of holding lamps can pose safety concerns, such as overheating, electrical failure, and risks of fire hazards. Therefore, the NEC emphasizes that these devices should only be used as intended, ensuring that electrical installations remain safe and compliant with established codes.

While some alternatives do exist for specialized applications, the standard practice and guidance within the NEC firmly indicate that screw-shell lamp holders are restricted to lamp-holding functions alone. This regulatory clarity is crucial for maintaining safe electrical systems in residential and commercial settings.