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The Leviton 157-X is a left-hand pigtail wiring connector used to terminate or extend electrical conductors in residential and light commercial wiring applications. Left-hand pigtails are configured for counterclockwise twist-on installation, making them suited for specific wiring orientations where standard right-hand connectors are not appropriate. Electricians use this type of connector to join wire ends cleanly within junction boxes, fixture housings, and panel connections. The 157-X is a Leviton factory-made pigtail assembly, providing a consistent, code-appropriate termination point without field-splicing bare conductors.
This connector is used in standard branch-circuit wiring scenarios including outlet and switch box terminations, lighting fixture wiring, and general low-voltage or line-voltage conductor joining. It is suited for residential new construction, renovation work, and light commercial installations where a reliable, insulated wire termination is required. Installation is performed by a licensed electrician following applicable NEC guidelines for conductor connections and box fill calculations.
Designed as an OEM-style replacement or direct-use left-hand pigtail connector for residential and light commercial electrical wiring applications.
Installation should be performed by a licensed electrician. De-energize the circuit at the breaker panel and verify the circuit is dead with a non-contact voltage tester before making any connections. Follow NEC requirements for conductor sizing, box fill, and termination methods. Do not exceed the connector's rated conductor capacity or combine incompatible wire gauges.
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