How many service disconnecting means can one set of service-entrance conductors supply in lieu of a single main disconnect?

The correct response is based on the National Electrical Code (NEC) regulations, which allow a specified range of service disconnecting means when using a single set of service-entrance conductors. This range encompasses the allowance for two to six disconnecting means positioned either at or near the service panel or in separate locations, as long as they are marked appropriately and coordinated for operation with the service-entrance conductors.

The flexibility to have multiple disconnects allows for the distribution of electricity across different sections or circuits within a building, enhancing safety and ensuring compliance with load management strategies. By permitting this setup, the NEC acknowledges practical applications in various electrical systems while still emphasizing the importance of clear labeling and accessible operation to maintain safety standards.

The other options fall outside of the acceptable standard according to existing codes, which limits the number of disconnecting means to six unless specific conditions are met, which are quite rare. This indicates that a key understanding of code regulations is vital for determining the proper configuration of service disconnects in any given electrical installation.