The service drop consists of three phase wires and a neutral wire which is grounded.

Later this design was improved by adding a third wire alongside the hot and neutral wires.

These plugs are rarely polarized, so you don't have to worry about the neutral wire.

It can be a hazard because the neutral wire is a current-carrying conductor.

Disconnect the two neutral (white) wires from the silver terminals.

The neutral wire is kept at ground potential.

Delta service has no distributed neutral wire and is therefore less expensive.

A neutral wire can be provided on wye output side.

The other end, called the neutral wire, leads to ground.

To prevent short circuits, the hot and neutral wires were kept far apart.