Main Feeder Wire, feeder conductors are conductors that are not service conductors and not branch circuit conductors.

All circuit conductors between the load side of the service equipment.

The lines side of the final branch-circuit overcurrent device is feeder conductors.

The definition of a feeder also includes the conductors from the source of a separately derived system.

Other non-utility power supply source and the final branch-circuit overcurrent device.

The conductors between the utility service point and the service disconnecting means are service conductors, not feeder conductors.

Special service conductor rules apply because these conductors do not have to short-circuit.

Ground-fault protection is other than what is provide on the primary side of the utility transformer.

Service conductors are not feeders.

Main Feeder Wire: Power Distribution

The primary system is made up of circuits known as primary feeders or distribution feeders.

A feeder includes the main or main feeder and branches or laterals tapped off the main, as shown in Figure 6.3.

A feeder is usually section by means of reclosing devices at various locations to remove as little as possible of a faulted circuit and hinder service to as few consumers as possible.

This is accomplish through the coordination of all the fuses and reclosers.

Fuses remain common, particularly at 11 kV.

For the protection of spurs connect to main feeders, although fuses are replacing with section switches and other disconnecting devices.

Which provide disconnection (but no an interruption of fault current) of the faulted section, often as part of a distribution automation scheme.

For main 11 kV feeders radiating from 33/11 kV.

primary substations, overcurrent relays, often in conjunction with auto-reclosers and fuses and/or section switches.

As described earlier in Section 3.5.1, are used to provide fault detection and interruption.

With the aforementioned fuses and section switches providing isolation of the faulted network section if it is located downstream from these devices.

At 132 kV, which can be class as either a distribution or transmission network.

The protection that is akin to that used for the protection of transmission networks is employed.

Current differential and/or distance protection (sometimes employing communications) is normally use to provide main protection, with backup being provide by distance and overcurrent protection.