1 Scope

1.1 These requirements cover 60 – 250 °C (140 – 482 °F) single- and multiple-conductor, jacketed cables for use as fixed wiring within buildings, may be used outdoors and/or for direct burial in Class 4 circuits in fault-managed power systems as described in Article 726 and other applicable parts of the National Electrical Code (NEC). Cables covered by these requirements include CL4P (plenum cables), CL4R (riser cables) and CL4 (general purpose cables) as described in Article 722. These requirements also cover cables designated as CL4Z that are intended for outdoor use only and are not to be attached to, or used within a building structure. Type CL4Z cables comply with the applicable requirements for CL4 except where otherwise specified.

1.2 Cables for Class 4 circuits are rated for 450 Volts peak but are not so marked.

1.3 These requirements do not cover cables that contain conductors for electric-light, Class 1, Class 2 or Class 3 circuits. These requirements do not cover optical-fiber cables that do not contain any electrical conductors (see the Standard for Optical Fiber Cable, UL 1651). These requirements do not cover communication cables (see the Standard for Communications Cables, UL 444) or cables for power-limited fire-alarm circuits (see the Standard for Cables for Power-Limited Fire-Alarm Circuits, UL 1424) or Power-Limited Circuit Cables (see the Standard for Power-limited Circuit Cables, UL 13).