Article 110 of the National Electrical Code (NEC) covers the general requirements for the examination and approval, installation and use, access to, and spaces about electrical equipment. Luminaires shall be of such construction or installed so that the conductors in outlet boxes shall not be subjected to temperatures greater than that for which the conductors are rated.Branch-circuit wiring, other than 2-wire or multiwire branch circuits supplying power to luminaires connected together, shall not be passed through an outlet box that is an integral part of a luminaire unless the luminaire is identified for through-wiring.Informational Note: See 410.64(C) for wiring supplying power to luminaires connected together. for recessed fluorescent luminaires instal led in the wall or the ceiling. The conductors shall be installed within the track housing, permit ting insertion of a luminaire, and designed to prevent tamper ing and accidental contact with live parts. The raceway used for the tap conductor must be at least 450 mm (18 in.) New Section 406.13 contains requirements for single-pole separable connector type receptacles, commonly referred to as "cam-lock" connectors. 1: No handhole shall be required in a pole 2.5 m (8 ft) or less in height abovegrade where the supply wiring method continues without splice or pull point, and where the interior of the pole and any splices are accessible by removing the luminaire.Exception No. Therefore, these fixtures now require a disconnecting means. Where showcases are cord- connected, the secondary circuit(s) of each electric-discharge lighting ballast shall be limited to one showcase. This may create inspection issues, as Ive seen these cord- and plug-connected and hung in various ways that I didnt consider permanent. Transformers shall be installed as near to the lamps as practicable to keep the secondary conduc tors as short as possible. Parts of the luminaire exposed within the hood shall be corrosion resistant or protected against corrosion, and the surface shall be smooth so as not to collect deposits and to facilitate cleaning. 150 mm (6 in.) The main item I want to cover here is the poles used to mount area lighting. Where supplied by a circuit having a grounded conductor, the grounded conductor shall be connected to the screw shell. The housing for the lighting track system shall be of substantial construction to maintain rigidity. He has been a master electrician since 1988. Along with making sure they have used lamps that are not larger than the luminaire allows per its listing and labeling, these little foil-covered insulation pieces are part of the fixture and are there to ensure we dont have heat transfer from the lamp to the wire terminations. You cannot have any part of a suspended fixture (i.e., the cord, pendant chain, etc.) Support. Recessed lighting is an item I emphasize as one of the most important items for inspections. Trees. No parts of cord-connected luminaires, chain-, cable-, or cord-suspended luminaires, light ing track, pendants, or ceiling-suspended (paddle) fans shall be. 400.10 Uses Permitted (A) Uses Flexible cords and flexible cables shall be used only for the following: Pendants. Chapter 3: Wiring Methods and Materials. (D) Location. Luminaires shall be constructed, installed, or equipped with shades or guards so that combustible material is not subjected to temper atures in excess of 90C (194F). The secondary circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. Equipment that has an open- circuit voltage exceeding 1000 volts shall not be installed in or on dwelling occupancies. The load and the branch-circuit rating cannot exceed the rating of the track. There are issues related to combustibles due to the heat that is generated by traditional lighting methods. a. Luminaires subject to physical damage, using a mercury vapor or metal halide lamp, installed in playing and spectator seating areas of indoor sports, mixed-use, or all- purpose facilities shall be of the type that protects the lamp with a glass or plastic lens. In addition to the provisions of 410.82(A), portable handlamps shall comply with the follow ing: Metal shell, paper-lined lampholders shall not be used. Wiring on or within luminaires shall be neatly arranged and shall not be exposed to physical damage. D2(b) Optional Calculation for One-Family Dwelling, Air Conditioning Larger than Heating [See 220.82(A) and 220.82(C)], Example No. The issue here is that these luminaires have the possibility of generating a lot of heat, and the lamp is designed to be installed inside a metallic housing, which is then installed at the top of a room in the ceiling. In 410.16, Clearance and Installation, the requirements are covered depending on the type of luminaire. According to the NEC 410.16(A), the following is defined as acceptable for installation in clothing closets: Surface or recessed incandescent or LED luminaires with an enclosed light source. 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]. More times than not, these custom one-of-a-kind units are not typically listed and labeled by a Nationally Recognized Testing Laboratory (NRTL). Installation. Luminaires designed for end-to-end connection to form a continuous assembly, or luminaires connected together by recognized wiring methods, shall be permitted to contain the conductors of a 2-wire branch circuit, or one multiwire branch circuit, supplying the connec ted luminaires and shall not be required to be listed as a race way. There is a concern that the lamps may fail in such a way that debris may fall onto people or combustible surfaces. In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XII of this article. There are other requirements in each of these parts that I encourage you to review, since this article only covers the highlights. Twisted or Cabled. Feeder and branch-circuit conductors within 75 mm (3 in.) Properly Secured. Electric-discharge lighting systems with an open- circuit voltage exceeding 1000 volts shall be listed and installed in conformance with that listing. If they dont say IC Rated on the luminaire, then the inspector should make sure there is a definite method to prevent insulation ever coming into contact with the luminaire. Splices and taps shall not be located within luminaire arms or stems. Stranded conductors shall be used for wiring on luminaire chains and on other movable or flexible parts. NEC Article 410 contains requirements for installing _____. Open-Circuit Voltage Exceeding 300 Volts. Enclosures. Transformers shall be accessible after installa tion. Lets examine the requirements of the NEC, IES, and other standards. Luminaires installed in recessed cavities in walls or ceilings, including suspended ceilings, shall comply with 410.115 through 410.122. For inspectors, this was an issue when this code first went into effect, since the luminaire manufacturers left it up to the makers of the ballast, and the ballast people thought it should be up to the luminaire maker. Individual showcases, other than fixed, shall be permitted to be connected by flexible cord to permanently installed receptacles, and groups of not more than six such showcases shall be permitted to be coupled together by flexible cord and separable locking-type connec tors with one of the group connected by flexible cord to a permanently installed receptacle. D8 Motor Circuit Conductors, Overload Protection, and Short-Circuit and Ground-Fault Protection, Example No. The insulation used on conductors must be suitable for the temperatures that they will be subjected to. Such tap conductors shall be in suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) Auxiliary equipment, including reactors, capacitors, resistors, and similar equipment, where not instal led as part of a luminaire assembly, shall be enclosed in accessi ble, permanently installed metal cabinets. However, in locations such as small alcoves or similar areas where 4 inch cans are installed, we may find problems. for recessed incandescent or LED lumin aires with a completely enclosed light source installed in the wall or the ceiling. Lamp tie wires, mount ing screws, clips, and decorative bands on glass spaced at least 38 mm (112in.) General II. Items such as marking for electrical ratings and warnings for combustibles, conductor and cord usage, and connections are covered. Coves shall have adequate space and shall be located so that lamps and equipment can be properly installed and maintained. Professional. Scope. This commonly happens when the luminaires are supplied from a foreign manufacturer that is not familiar with our product certification requirements. Adequate airspace shall be provided between lamps and shades or other enclosures of combustible material. The separation between cases is not in excess of 50 mm (2 in. 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. D6 Maximum Demand for Range Loads, Example No. I will not cover each of these here, please review them on your own so that you will be aware of what is in this part of the code. Location. The track system ends shall be insulated and capped. The second location to cover in detail is clothes closets, which is found in 410.16. There are requirements for supported and unsupported cables. A brief note regarding 410.18 Space for Cove Lighting: the code states that cove lighting shall have adequate space so that lamps and equipment can be properly installed and serviced. These poles are likely to be touched by the general public, and if a fault occurs a person could be seriously injured or killed. There are additional requirements for cable installed in cable tray and cable grouped together supported by messenger cable. for surface-mounted fluorescent lumin aires installed on the wall above the door or on the ceil ing. 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. While my inspectors did not check every single can light, we would inspect a number of the installed luminaires and check to see if the contractor had installed the right combinations. 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. There are two specific locations I want to cover in this article. However, the requirements within this article are important to know and enforce. Electric-Discharge Lamp Auxiliary Equipment. Inherently Protected. Part XV. 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. C. Construction Specifications 330.104 Conductors for surface-mounted incandescent or LED luminaires with a completely enclosed light source installed on the wall above the door or on the ceiling. 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