Identifing Conductors

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All conductors in an electrical distribution system must be identified. Each conductor in multiconductor cable is color coded and each pin in the connector corresponds to a matching colored conductor and its function. Each single conductor cable must be identified by uniquely colored connectors, colored phasing taped wrapped around the cable at each end, or knots tied at each end in the permanent ties used when the cable is coiled for storage.

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AC Power

The ground wire is identifed by the color green or green with a yellow strip.

The neutral (the identified conductor, the grounded conductor) is identified by the color white or natural gray.

The ungrounded conductors are usually marked Red (line 1), Blue (line 2),and Black (line 3), in the USA, for three phase systems, Black and Red for two phase systems.

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DC Power

Positive is identified by the color Red.

Negative is identified by the color White. On a battery the negative is identified by the color Black

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Location Power

"Location" power may be AC, DC or both. AC power is indicated by red markings. DC power is indicated by black markings. If there is more than one run of cable and / or more than one generator, they must be uniquely identified.

There are various system for distributing power. The spider box [buss bar within an insulated box] is often used to connect lengths of cables. It is very flexible.

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