(5) Cable, conductors in conduit, or other fixed wiring method for the secondary circuit (4) Cord (secondary circuit) for which the luminaires and power supply are listed for use A lighting system assembled from the following listed parts shall be permitted: The luminaires, power supply, and luminaire fittings (including the exposed bare conductors) of an exposed bare conductor lighting system shall be listed for the use as part of the same identified lighting system. Lighting systems operating at 30 volts or less shall be listed as a complete system. Class 2 power sources and lighting equipment connected to Class 2 power sources shall be listed. Lighting systems operating at 30 volts or less shall comply with 411.4(A) or 411.4(B). This article also covers lighting equipment connected to a Class 2 power source.Ĥ11.4 Listing Required. This article covers lighting systems operating at 30 volts or less and their associated components. Title: ARTICLE 411 Lighting Systems Operating at 30 Volts or Less and Lighting Equipment Connected to Class-2 Power Sources. Once there, click on their link to free access to the 2017 NEC ® edition of NFPA 70. See the actual NEC ® text at NFPA.ORG for the complete code section. Nine different references to “Class 2” throughout the Article were reduced to three so as only to reference Class 2 where necessary and avoid confusion.īelow is a preview of the NEC.Confusing language about lighting “systems” in 411.4(A) and 411.4(B) was clarified or removed.411.3 The output circuits of the power supply shall be rated for 25 amperes maximum under all load conditions instead of 25 amperes and 30 volts (42.4 volts peak) maximum as previously required in the 2014 NEC.Article title changed to “Low-Voltage Lighting”.In the 2017 NEC, the article title has been changed to Low Voltage Lighting and many of the previous Class 2 references were removed.īelow is a list of a few important changes to Article 411: Listed Class 2 power supplies are evaluated for fire and shock hazards regardless of maximum output ratings. All with little or no increased safety levels. Those tables provide the maximum power limits for a Class 2 power supply and are far too restrictive to be applied generally to all low voltage lighting installations using a Class 2 power transformer.īased on the 2014 requirements and the restrictions in Chapter 9 Tables 11(A) and 11(B), a small and simple low voltage lighting installation, such as those commonly installed under the kitchen cabinets, might require several Class 2 power supplies in order to comply with the code language and stay within the maximum power requirements for a Class 2 power supply. Part of the 2014 revisions included a reference in 411.3(B) requiring listed Class 2 lighting equipment to be rated in conformance with Chapter 9, Table 11(A) or Table 11(B). In the 2014 NEC, revisions to the title and content in Article 411 acknowledged that the article included lighting equipment connected to a Class 2 power source. ![]() 1888-NFPA 70-2014 was the main contributor that resulted in the major changes to Article 411. This code change requires a careful read in order to grasp what occurred. Code Change Summary: Changes were made to simplify Article 411.
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