What type of switch can be employed as a disconnecting means for ungrounded service conductors?

To determine a suitable disconnecting means for ungrounded service conductors, the National Electrical Code (NEC) permits both manual and power-operated switches. Each type of switch fulfills the safety requirements necessary for isolating the electrical supply to prevent electrical hazards during maintenance or repair work.

A manual switch, often known as a disconnect switch, allows an individual to de-energize the circuit by physically operating the switch. This provides a straightforward and visible means of controlling the electrical supply.

On the other hand, a power-operated switch can be controlled remotely, offering convenience in situations where access to the switch may be restricted or where a rapid response is necessary. These switches usually include mechanisms that ensure safe de-energization of the circuit without the immediate presence of a technician.

Both types provide essential functions in ensuring compliance with safety standards and preventing accidents. Hence, the use of either a manual or power-operated switch as a disconnecting means for ungrounded service conductors aligns with NEC guidelines, making this option the most comprehensive and applicable to various installation scenarios.