At least how many inches of free conductor should be left at each outlet, junction, and switch point for splices?

The correct answer is based on the National Electrical Code (NEC) requirements regarding conductor lengths at outlet, junction, and switch points. According to the NEC, a minimum of 6 inches of free conductor must be left at each of these points. This allowance is intended to provide adequate length for splicing and to ensure that there is enough conductor available for making connections safely and effectively without risking stress or damage to the wires.

Having sufficient length is crucial for accessibility during maintenance or future modifications, as it allows electricians to easily work with the connections without needing to re-pull additional wire. The 6-inch requirement is a standard that helps promote safety and efficiency in electrical installations.