High-voltage distribution box neutral and live wire connection method

The following figure shows a typical breaker box panel for 120V and 240V circuits. There are three wires entering the main panel from the energy meter viz: 1. Hot 1 or Line 1 = Black Color 2. Hot 2 or Line. [PDF]

Road construction electrical distribution box fence

The purpose of these rules is to formulate, for the State of California, uniform requirements for underground electrical supply and communication systems, the application of which will insure adequate service. [PDF]