UL 5B-2019 pdf download

UL 5B-2019 pdf download.Strut-Type Channel Raceways and Fittings.
2.4 Installation 2.4.1 The installation of a strut-type channel raceway or fitting, shall be practical and feasible under the conditions likely to be met in practice. The strut-type channel raceway, fittings and any wiring devices or accessories are to be installed as intended and examined with regard to the feasibility of installation, as well as for compliance with the construction, performance, and marking requirements in this standard. Attention is to be given to items that require particular care on the part of the installer. 2.5 Nonmetallic parts 2.5.1 A nonmetallic closure strip (cover) or other non-metallic part shall comply with the applicable requirements in the Standard for Nonmetallic Surface Raceways and Fittings, UL 5A. 2.6 Boxes 2.6.1 Boxes shall comply with the Standard for Metallic Outlet Boxes, UL 514A. 3 Glossary 3.1 For the purposes of this standard, the following definitions apply: 3.2 ACCESSORY – A part that may be added to a strut-type channel raceway system for a special purpose (for example, guards, hangers, retainers). 3.3 BOX, FIXTURE – A box that has been evaluated and determined to be capable of being used as the support of a lighting fixture, lampholder, or other equipment intended for similar installation. 3.4 FITTING – A part used to connect, change direction, or terminate a strut-type channel raceway (for example, a transition adapter, an end cap, a corner, a tee, a joiner, or a box). 3.5 NONMETALLIC – A polymeric part. 3.6 RACEWAY, STRUT-TYPE CHANNEL – A continuous metallic channel for surface or suspension mounting having inturned lips and a metal or nonmetallic closure strip. 3.7 RACEWAY SYSTEM – A system consisting of a strut-type channel raceway, associated fittings and in some instances includes wiring devices and accessories. 3.8 WIRING DEVICE – A part of an electrical system that is intended to carry, provide a means of connection to or control of electrical energy within a raceway system (for example, switches or receptacles).
4 General 4.1 A strut-type channel raceway system shall be constructed to facilitate compliance with the requirements for the installation of insulated wires and cables as given in the National Electrical Code, ANSI/NFPA 70. 4.2 A component of a strut-type channel raceway system shall comply with the requirements for the construction, performance, and use of that component. 4.3 A strut-type channel raceway shall consist of one or more pieces formed and constructed to make the raceway readily distinguishable from electrical conduit, tubing, and other raceway systems. 4.4 A strut-type channel raceway system shall provide a complete enclosure that protects the wires installed therein against damage. The complete system, when installed as intended, shall comply with the following: a) There shall not be any openings that exceed 1/16 inch (1 .59 mm) in width following installation of the system. b) A knockout shall completely cover the opening in which it is located, and the clearance between the knockout and the opening shall not be more than 0.030 inch (0.76 mm). 4.5 The interior surface of the strut-type channel raceway system shall have a smooth finish that is free from projections, sharp edges, burrs, fins, and other faults likely to damage wires when installed as intended. 4.6 The strut-type channel raceway shall have provisions for mounting as follows: a) Surface mounted – Securement to the mounting surface by means of external retention straps at intervals not exceeding 10 feet (3.05 m) and within 3 feet (0.9 m) of a fitting. b) Suspension mounted – Suspension from the mounting surface by means of external hangers, threaded rods, or chains, or by means determined to be the equivalent, at intervals not exceeding 10 feet (3.05 m).
4.7 For strut-type channel raceways using conductors larger than No. 6 AWG (13.30 mm 2 ), the Short Circuit Test, Section 16, shall be performed on conductors in the raceway to determine whether the cover is secure. 4.8 Provision shall be made for securing the closure strip (cover) to the channel (base) of a two-piece strut-type channel raceway at intervals of not more than 4 feet (1.2 m). A closure strip (cover) that is held in place by continuous grooves, flanges, or similar construction, shall securely fix the closure strip in place. (See 4.9.)UL 5B-2019 pdf download.