Final answer:
Feeder circuits are the electrical circuits that transport power from the service equipment or generator switchboard to the overcurrent protection device and are essential for power distribution and safety within the electrical system.
Step-by-step explanation:
The conductors described in the question are known as feeder circuits. These are the electrical circuits that carry power from the service equipment or generator switchboard of an isolated plant to the final branch-circuit overcurrent protection device which is typically a circuit breaker or fuse. Feeder circuits therefore, are crucial for providing power distribution throughout a system before it reaches the end point of consumption.
The circuit breakers and fuses within the feeders interrupt excessive currents to prevent thermal hazards. Moreover, devices like ground fault interrupters (GFI) enhance safety by preventing shock and isolating transformers to ensure that if any contact is made with live parts, the person contacting will not be a path to ground and will be protected from electrical shock.