Service Entrance Cable

Definition: The conductors (electrical cable with multiple wires) that connect and carry the electrical current the service conductors (drop or lateral) above ground to the service equipment of the building. It can also be used as a panel feeder and in branch circuits.

Service entrance cable are usually of two types: SER or SEU.

SER cable is SE (Service Entrance) Style R, which has a reinforcement tape and may be made of copper or aluminum.

SEU cable is SE (Service Entrance) Style U, which means it is unarmored. It is typically used as a panel feeder in multi-unit residential settings.

Both types should be rated at 600 volts and 90ºC, and is for use in both wet and dry conditions.

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