Where a luminaire is recessed in fire-resistant material in a building of fire-resistant construction, a temperature higher than 90C (194F) but not higher than 150C (302F) shall be considered acceptable if the luminaire is plainly marked for that service. Connection of Electric-Discharge and LED Luminaires. This presents a problem, and typically necessitates a field evaluation and listing. Through-Wiring. Installation. Lighting track shall be grounded in accord ance with Article 250, and the track sections shall be securely coupled to maintain continuity of the circuitry, polarization, and grounding throughout. For common inspections, it is important to verify that the outlet boxes are covered; this is usually done by the fixture and/or the canopy. Choose topics from a full list of courses covering electrical topics that cover what you need to know from the NEC and other electrical codes and standards. All wiring must be in rigid conduit or threaded steel intermediate metal conduit and will need to have seal fittings installed per 501.15 (A). Corrosive Locations. Metal or nonmetallic poles shall be permitted to be used to support luminaires and as a raceway to enclose supply conductors, provided the following conditions are met: A pole shall have a handhole not less than 50 mm 100 mm (2 in. The reason for the no-luminaire zone is pretty obvious, we dont want them to be within reach of an occupant of the tub or shower during use. Conductors in vertical poles used as raceway shall be supported as provided in 300.19. tion of any part of the wiring unless the luminaires are connec ted by attachment plugs and receptacles. 410.62 Cord-Connected Lampholders and Luminaires. in any dimension. Live Parts. Handlamps shall be equipped with a handle of molded composition or other insulating material. Informational Note: Combustible low-density cellulose fiber board includes sheets, panels, and tiles that have a density of 320 kg/m3(20 lb/ft3) or less and that are formed of bonded plant fiber material but does not include solid or laminated wood or fiberboard that has a density in excess of 320 kg/m3(20 lb/ft3) or is a material that has been integrally treated with fire-retarding chemicals to the degree that the flame spread index in any plane of the material will not exceed 25, deter mined in accordance with tests for surface burning characteris tics of building materials. or exceeds 400 mm (16 in.) from lamp terminals shall not be required to be grounded. Luminaires (Fixtures) over Combustible Material. One of the requirements is that these units must have a thermal protection device that will disconnect the lamp if the temperature limit is exceeded. Decorative lighting and similar accessories used for holiday lighting and similar purposes, in accordance with 590.3(B), shall be listed. As we all know, heat rises, and a heat pocket is created within each fixture. Lamps or lampholders shall be designed so that there are no exposed live parts when lamps are being inserted or removed. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association. Don't let this Article's length and degree of detail throw you. In indoor locations other than dwellings and associated accessory structures, fluorescent luminaires that utilize double-ended lamps and contain ballast(s) that can be serviced in place shall have a disconnecting means either inter nal or external to each luminaire. This often leads to problems, such as when we have special luminaires used inside casinos, hotels and other large facilities where the units are actually a piece of artwork with lights attached. The last thing we want is to have a heat source that may ignite some material within the ceiling and cause an attic fire. An autotransformer that is used to raise the voltage to more than 300 volts, as part of a ballast for supplying lighting units, shall be supplied only by a grounded system. Replacement ballasts shall also have thermal protection integral with the ballast. External wiring is not permitted except chain-supported luminaires (fixtures). The National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States. Luminaires shall not be used as a raceway for circuit conductors unless they comply with 410.64(A), (B), or (C). A metal pole shall be provided with an equipment grounding terminal as follows: A pole with a handhole shall have the equipment grounding terminal accessible from the handhole. No parts of cord-connected luminaires, chain-, cable, or cord-suspended luminaires, lighting track, pendants, or ceiling-suspended (paddle) fans shall be located within a zone measured 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of the bathtub rim or shower stall threshold. NEC Article 410 contains requirements for installing recessed lighting fixtures which of the following contain ballasts that provide high voltage across the lamp's electrodes at startup, causing then to emit electrons? Since most poles are metallic, you absolutely have to make this inspection to insure they are grounded. The housing for the lighting track system shall be of substantial construction to maintain rigidity. He holds ten inspections certifications from IAEI and ICC. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. long and not more than 1.8 m (6 ft.) long, be a suitable raceway or the tap conductor must be Type AC or MC cable. Introductioin to the National Electrical Code. Some of the articles include provisions pertaining to switches, receptacles, switchboards and panelboards, industrial control panels, luminaires, appliances, air-conditioning and refrigeration equipment, and transformers. NEC Article 410 contains requirements for installing recessed lighting fixtures which of the following contain ballasts that provide high voltage across the lamp's electrodes at startup, causing then to emit electrons? (D) Bathtub and Shower Areas. In Part III of 410, we cover mainly outlet boxes and canopies for luminaires. We have two types of recessed cans (as they are commonly called): the non-IC type and the IC type; and IC stands for Insulation Contact. Canopies and outlet boxes taken together shall provide sufficient space so that luminaire conductors and their connecting devices are capable of being installed in accordance with 314.16. 410.130 (G) Disconnecting means. constant wattage autotransformer Remember that this is a minimum requirement, and the weight of some of the track luminaires with fluorescent (ballast) or LED drivers may be quite heavy. 410.8 Inspection. Installed in Poured Concrete. Requirements for communications . If you install any electrical wiring or equipment in, or adjacent to, bodies of water not covered by other Articles in the NEC, the installation must conform to Article 682 [682.1]. Im not going to cover every one of these items in detail, but please be aware that units installed in wet or damp locations have to be listed for the appropriate location and should prevent water from entering a wiring compartment. The load calculation in 220.43(B) shall not be required to limit the length of track on a single branch circuit, and it shall not be required to limit the number of luminaires on a single track. For the AHJ, this is once again one of those judgment calls. Temperature. 2: See 300.5(D) for protection of conductors. When connected to multiwire branch circuits, the disconnecting means shall simultaneously break all the supply conductors to the ballast, including the grounded conductor. Part XII Special Provisions for Electric-Discharge Lighting System of 1000 Volts or Less includes 410.130(G) Disconnecting Means. One word of caution with IC rated cans: make sure the proper size lamp and the matching trim is used, as these are tested using specific lamp and trim combinations to insure they do not overheat. Tap Conductors. Raceway Fittings. Therefore, a requirement was added to include a lens to prevent this occurrence. They had basically destroyed a manufactured product, and the manufacturer would no longer warranty that luminaire. Equipment for use with electric-discharge lighting systems and designed for an open-circuit voltage of 1000 volts or less shall be of a type identified for such service. The ballast of a fluorescent luminaire installed indoors shall have integral thermal protec tion. However, the requirements within this article are important to know and enforce. If you try to read the definition, it might be a little confusing trying to imagine the shape from the language. 410.84 Cord Bushings. a disconnecting means either internal or external to each luminaire (fixture), to disconnect simultaneously from the source of supply all conductors of the ballast, including the grounded conductor if any. This month we will continue the series of articles covering basic electrical inspection items. Luminaires and lampholders shall be securely supported. Where showcases are cord- connected, the secondary circuit(s) of each electric-discharge lighting ballast shall be limited to one showcase. All luminaires shall be marked with the maxi mum lamp wattage or electrical rating, manufacturers name, trademark, or other suitable means of identification. (A) Wet and Damp Locations. Part XV. They must be installed so that any adjacent combustible material will not be subjected to a temperature higher than 90C (194F). Elevator cables. Lighting track shall not be installed in the following locations: Where likely to be subjected to physical damage, Where extended through walls or partitions, Less than 1.5 m (5 ft) above the finished floor except where protected from physical damage or track operating at less than 30 volts rms open-circuit voltage. Conductors shall be arranged so that they are not subjected to tempera tures above those for which they are rated. The terminal of an electric-discharge lamp shall be considered as a live part. The main item I want to cover here is the poles used to mount area lighting. In Ducts or Hoods. Pendant lampholders with permanently attached leads, where used for other than festoon wiring, shall be hung from separate stranded rubber-covered conductors that are soldered directly to the circuit conductors but suppor ted independently thereof. (D) Location. Professional. In this case, the power to the ballast is disconnected when the lamp is removed. Equipment other than showcases shall not be electrically connected to showcases. Size. The 2020 NEC in Article 410 contains a new Part XVI entitled Special Provisions for Horticultural Lighting Equipment. Branch-circuit conductors that have an insulation suitable for the temperature encountered shall be permitted to terminate in the luminaire. Parts that must be removed for lamp replacement shall be hinged or held captive. 150 mm (6 in.) for an incandescent luminaire (fixture) and 150 mm (6 in.) The groun ded conductor, where connected to a screw shell lampholder, shall be connected to the screw shell. These are very commonly used in residential construction and are a very important part of the residential inspection process. Randy Hunter is an instructor and consultant specializing in electrical code and installations, and co-owner of Hunter Technical Services. Luminaires shal be securely fastened to the ceiling framing member by mechanical means such as bolts, scres, or rivits. A simple reactance ballast in a fluorescent luminaire with straight tubular lamps shall not be required to be thermally protected. Often we find shelves that hold cardboard boxes or garments that are easily ignited if in contact with a heat source. I will not go into detail here, but the scope has a laundry list of items and you will find that it is pretty exclusively related to lighting products and devices. Portable handlamps shall not be required to be grounded where supplied through an isolating transformer with an ungrounded secondary of not over 50 volts. on either side of the rod on a plane horizontal to the floor extending the entire length of the rod. Part V reviews the grounding requirements and basically states that if a luminaire or lighting equipment has metal parts, it shall be grounded. Handlamps shall be equipped with a substantial guard attached to the lampholder or handle. The load and the branch-circuit rating cannot exceed the rating of the track. Receptacles and attachment plugs shall be permitted to be of a lower ampere rating than the branch circuit but not less than 125 percent of the luminaire full-load current. Secondary circuit outputs shall not be connected in parallel or in series. Article 410 is another example of an article in Chapter 4 of the NEC that often doesnt get a lot of emphasis from multi-trade inspectors. Diffusers shall be resistant to thermal shock. These poles are likely to be touched by the general public, and if a fault occurs a person could be seriously injured or killed. Equip ment having an open-circuit voltage exceeding 300 volts shall not be installed in dwelling occupancies unless such equipment is designed so that there will be no exposed live parts when lamps are being inserted, are in place, or are being removed. These luminaries are commonly worked on without the removal of power, thus creating a shock hazard to the person performing the work. 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