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. The two that stand out are where subject to physical damage, which to date the NEC cant or wont define, and wet or damp locations. When inspecting the supports, please remember 410.154 Fastening, which states that it shall be securely mounted so that each support is suitable for the weight of the luminaires that can be installed. Luminaires installed in corrosive locations shall be of a type suitable for such locations. 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. Protection Through Metal. So on a non-IC type we must have a 1/2 inch space from any recessed parts to combustibles, excluding the support or finish trims. 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. 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. The free lead at the end of a group of showcases has a female fitting not extending beyond the case. within 900 mm (3 ft.) horizontally and 2.5 m (8 ft.) vertically from the top of the bathtub rim or shower stall threshold. Location. Lamps shall not be located where normally exposed to physical damage. 410.10 (D) Bathtub and Shower Areas. Through-Wiring. Insulating joints that are not designed to be mounted with screws or bolts shall have an exterior metal casing, insulated from both screw connections. Raceway Fittings. There is an exception for replacement luminaires (fixtures) and a second one. The groun ded conductor, where connected to a screw shell lampholder, shall be connected to the screw shell. Direct-Current Equipment. Busways. The grounding terminations within the poles are often difficult to install and also inspect. 02/08/2017. Since the closet doors are generally closed, if the fixture is left on and overheats items in the closet, the resulting fire could go unnoticed for quite some time. Secondary Connections. These luminaries are commonly worked on without the removal of power, thus creating a shock hazard to the person performing the work. Wet and Damp Locations. Twisted or Cabled. Connection of portable luminaires, portable and mobile signs, or appliances. The fittings cannot have general-purpose receptacles. Lampholders Near Combustible Material. Unless identified for supports at greater intervals, a single section 1.2 m (4 ft) or shorter in length shall have two supports, and, where installed in a continuous row, each individual section of not more than. Total Cards. One important requirement to note is that a fixture can be supported from an outlet box if the outlet box is required by 314.23 and complies with 314.27 (A) and 314.27 (B). Luminaires installed in wet or damp locations shall be installed such that water cannot enter or accumulate in wiring compartments, lampholders, or other electrical parts. One note Id like to add regarding these inspections. Live Parts. This article covers luminaires, portable lumin aires, lampholders, pendants, incandescent filament lamps, arc lamps, electric-discharge lamps, decorative lighting products, lighting accessories for temporary seasonal and holiday use, portable flexible lighting products, and the wiring and equip ment forming part of such products and lighting installations. Recepta cles, connectors, and attachment plugs shall be of a listed grounding type rated 15 or 20 amperes. Simple Reactance Ballasts. Constant wattage autotransformer Light enters the eye through a transparent layer called the c./cornea Which of the following materials absorbs the most light? 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. 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. A common problem here is that a contractor will use a particular brand of recessed can, and then trim them out with a different brand of trim; since those items were not tested together, this is a violation of the IC listing of the recessed can. Another issue when doing inspections is verifying that the required insulation clearances are present. Corrosive Locations. General-purpose electrical equipment includes heaters, switches, receptacles, and cords. Part XII. Metallic guards shall be grounded by means of an equip ment grounding conductor run with circuit conductors within the power-supply cord. The luminaire shall then comply with 410.42. 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. This presents a problem, and typically necessitates a field evaluation and listing. Outlet boxes or fittings installed as required by 314.23 and complying with the provisions of 314.27(A)(1) and 314.27(A)(2) shall be permitted to support luminaires. Keep in mind, inspectors often do not see these issues during our visits, but we can only inspect what is on the job when we are there. All rights reserved. (C) In Ducts or Hoods. A ballast in a fluorescent exit luminaire shall not have thermal protection. The term luminaires is recommended by the International Electrotechnical Commission. There are issues related to combustibles due to the heat that is generated by traditional lighting methods. One category that is a fairly new concern is indoor sports, mixed use and all-purpose facilities that may utilize mercury vapor or metal halide lamps. Luminaires (Fixtures) in Specific Locations. Therefore, these fixtures now require a disconnecting means. Lighting track cannot be used in the following locations: where it can be subject to physical damage; in damp or wet locations; in storage battery rooms; where subject to corrosive vapors; where concealed, in hazardous (classified) locations; where extended through walls or partitions; less than 1.5 m (5 ft.) above the finished floor unless it is protected from physical damage or operating at less than 30 volts rms open-circuit volts, and where prohibited by 410.4(D). Lamp Terminals and Lampholders. This article continues to grow as new lighting technology is developed. The first is related to locations in and near bathtub and shower areas. When connected to multiwire branch circuits, the disconnecting means shall simultaneously break all the supply conductors to the ballast, including the grounded conductor. Luminaire Stems. One additional 2-wire branch circuit separately supplying one or more of the connected luminaires shall also be permit ted. Lumin aires with exposed metal parts shall be provided with a means for connecting an equipment grounding conductor for such luminaires. One important requirement to note is that a fixture can be supported from an outlet box if the outlet box is required by 314.23 and complies with 314.27(A) and 314.27(B). Heavy-Duty Lighting Track. Tap conductors can run to a box at least 300 mm (1 ft.) from the fixture. The luminaire shall be constructed so that all exhaust vapors, grease, oil, or cooking vapors are excluded from the lamp and wiring compartment. A pole with a hinged base shall have the equipment grounding terminal accessible within the base.Exception to (3): No grounding terminal shall be required in a pole2.5 m (8 ft) or less in height abovegrade where the supply wiring method continues without splice or pull, and where the interior of the pole and any splices are accessible by removing the luminaire. Recessed high-intensity luminaires designed to be installed in wall or ceiling cavities shall have thermal protec tion and be identified as thermally protected. on either side of the rod on a plane horizontal to the floor extending the entire length of the rod. Thermal protection shall not be required in a recessed high-intensity discharge lumin aire identified for use and installed in poured concrete. 150 mm (6 in.) 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A bushing or the equivalent shall be provided where flexible cord enters the base or stem of a porta ble luminaire. 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. In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XIII of this article. Luminaires, portable luminaires, lamphold ers, and lamps shall have no live parts normally exposed to contact. Luminaires installed in recessed cavities in walls or ceilings, including suspended ceilings, shall comply with 410.115 through 410.122. Normally, luminaires (fixtures) cannot be used as raceways. Luminaires shall be wired with conductors having insulation suitable for the environmental conditions, current, voltage, and temperature to which the conductors will be subjected. The connected load on lighting track shall not exceed the rating of the track. 410.44 Methods of Grounding. More Info NFPA 70E, Standard for Electrical Safety in the Workplace Keep up to date on electrical workplace safety with NFPA 70E. These are very commonly used in residential construction and are a very important part of the residential inspection process. 2: Replacement luminaires shall be permitted to connect an equipment grounding conductor from the outlet in compliance with 250.130(C). Trees. The idea with this code requirement is that we dont want a heat source, the luminaire, to be in contact with anything that may be stored there. The next important item is 410.6, which states that all luminaires and lamp holders shall be listed. The installation shall comply with 410.59(A) through (E). 410.93 Double-Pole Switched Lampholders. Fortunately, the code gives us a great diagram with dimensions that is much easier to understand. Which section of the NEC requires that at least 6" of free conductor length be left at each outlet box when cutting the branch circuit wires in preparation for connecting a light fixture? 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. In other words, the lamp is the disconnect. Integral Thermal Protection. Is a small pantry with a door in your kitchen considered a closet? The second location to cover in detail is clothes closets, which is found in 410.16. Excess wiring shall be avoided. Secondary Conductors. Often we find shelves that hold cardboard boxes or garments that are easily ignited if in contact with a heat source. Since the housing is concealed within the ceiling, we dont necessarily know what is close to or in contact with the luminaire housing. Circuit Conductors. Installed in Poured Concrete. Coves shall have adequate space and shall be located so that lamps and equipment can be properly installed and maintained. Raceway fittings used to support a luminaire(s) shall be capable of supporting the weight of the complete fixture assembly and lamp(s). 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. D5(b) Optional Calculation for Multifamily Dwelling Served at 208Y/120 Volts, Three Phase, Example No. The first requirement is that it is to be installed permanently and permanently connected to a branch circuit. Conductors that have insulation suitable for the temperature encountered shall be used. Part XV. Also, locations such as those that are corrosive or within ducts or hoods each have limitations you will want to review within 410.10 if inspecting these areas. Auxiliary equipment for electric-discharge lamps shall be enclosed in noncombustible cases and treated as sources of heat. 1.2 m (4 ft) in length shall have one additional support. All luminaires, lampholders, and retrofit kits shall be listed. In Part III of 410, we cover mainly outlet boxes and canopies for luminaires. Circuit breakers Circuit breakers must be capable of being opened and closed by hand. (C) Luminaire (Fixture) Types Not Permitted. So, we have to picture the cube directly over the tub or shower, extending 3 feet out from the edge and 8 foot above the unit. . best small portable charger for android; international conference on social sciences and humanities 2022; radiator stop leak tablets The code has a specific set of dimensions for storage space with an explanatory diagram. Support. This location is permitted only in nonresidential cooking areas and is subject to four specific conditions. Many of the items have been created directly as a result of disaster conditions through history. Type IC fixtures are designed to be installed in such a way that they may have insulation directly in contact with them. In this case, the power to the ballast is disconnected when the lamp is removed. Exception No. The vertical location of the kitchen countertop receptacles is addressed in 210.52 (C) (5); they are not permitted more than 20 inches above the countertop. 410.73 (G) Handbook Commentary Section 410.73 (G) was added to the 2005 Code with an effective date of January 1, 2008. . Lampholders installed in wet locations shall be listed for use in wet locations. Equipment that has an open- circuit voltage exceeding 1000 volts shall not be installed in or on dwelling occupancies. For the AHJ, this is once again one of those judgment calls. Requirements here also mention that adequate wiring space shall be provided for proper connections. Luminaires shall be installed so that adjacent combustible material will not be subjected to temperatures in excess of 90C (194F). A luminaire that weighs more than 3 kg (6 lb) or exceeds 400 mm (16 in.) If they were installed in a ceiling, we had the installer frame a box out around the fixtures to maintain the required 3 inch clearance from insulation. The line side terminals of the disconnecting means shall be guarded.Exception No. Having been a contractor for several years, I was often exasperated at whoever designed a location for lighting to be installed that you physically could not get to in order to service it, especially some of the cove lighting in restrooms where the installed stalls and plumbing fixtures created great obstacles to work around. The secondary circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. Lamps or lampholders shall be designed so that there are no exposed live parts when lamps are being inserted or removed. Accessible. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association. 410.70 Combustible Shades and Enclosures. Installation. Metal raceways or other equipment grounding conduc tors shall be bonded to the metal pole with an equipment grounding conductor recognized by 250.118 and sized in accordance with 250.122. In Article 100 we find the definition for a clothes closet, which is a non-habitable room or space intended primarily for the storage of garments and apparel. Professional. However, the only requirements for luminarie installations in closets appear in section 410.16, which specifically addresses luminaires in clothes closets. A recessed remote ballast for a high-intensity discharge luminaire shall have thermal protec tion that is integral with the ballast and shall be identified as thermally protected. Adjacent to Combustible Materials. You may need to comply with more stringent requirements for lights than those contained in Article 410. Transformers of the oil-filled type shall not be used. 2014 Code Language: 410.130 (G) Disconnecting means. Luminaires (Fixtures) Near Combustible Material. Secondary Circuit(s). The equipment grounding conductor c. Luminaire Types Not Permitted. To play this game about lighting, you need a sharp eye, a quick mind and a 2020 National Electrical Code book. or the width of the shelf, whichever is greater; for a closet that permits access to both sides of a hanging rod, this space includes the volume below the highest rod extending 300 mm (12 in.) Type IC luminaires have different requirements. Support. General. Electric-discharge luminaires provided with mogul-base, screw shell lampholders shall be permitted to be connected tobranch circuits of 50 amperes or less by cords complying with240.5. Please take time to read the scope of this article in 410.1. Secondary circuit outputs shall not be connected in parallel or in series. Exception No. Support of Exposed Cable for PV Systems: Requirements and Recommendations, Baby, Its Cold OutsideBut the House is Warm and Electrically Safe, Grounding and Bonding Devices and Splicing Connectors for the Line Side of the Service, NEC Rapid Shutdown Requirements and UL 3741, Basic three-phase power measurements explained, Electricians Adapt to Increased Growth in Lighting Technologies. More times than not, these custom one-of-a-kind units are not typically listed and labeled by a Nationally Recognized Testing Laboratory (NRTL). 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. If you are tasked with doing inspections for parking lot lighting, you need to be familiar with a few items. No unnecessary splices or taps shall be made within or on a luminaire.Informational Note: For approved means of making connec tions, see 110.14. This month we will continue the series of articles covering basic electrical inspection items. Luminaires shall be securely fastened to the ceiling framing member by mechanical means such as bolts, screws, or rivets. What about single pin lamps? Luminaires and equipment shall be mechanically connected to an equipment grounding conductor as specified in 250.118 and sized in accordance with 250.122. for a fluorescent luminaire (fixture). 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. Multiwire Branch Circuits. Fire-Resistant Construction. Separate Mounting. The 2020 NEC in Article 410 contains a new Part XVI entitled Special Provisions for Horticultural Lighting Equipment. 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. or exceeds 400 mm (16 in.) 2: No handhole shall be required in a pole 6.0 m (20 ft) or less in height abovegrade that is provided with a hinged base. Snap switches shall comply with 404.14. 400.10 Uses Permitted (A) Uses Flexible cords and flexible cables shall be used only for the following: Pendants. Replacement ballasts shall also have thermal protection integral with the ballast. Thermal protection shall not be required in a recessed high-intensity luminaire whose design, construction, and thermal performance characteristics are equivalent to a thermally protected luminaire and are identi fied as inherently protected. Unless part of listed decorative lighting assemblies, pendant conductors shall not be smaller than 14 AWG for mogul-base or medium-base screw shell lampholders or smaller than 18 AWG for intermediate or candelabra-base lampholders. (B) Luminaire (Fixture) Types Permitted. Lampholders installed in damp locations shall be listed for damp locations or shall be listed for wet locations. Recessed Incandescent Luminaires. 410.50 Polarization of Luminaires. Scope. Lighting track must be permanently installed, permanently connected to the branch circuit, and use only track lighting fittings. Where used with Edison-base lamp holders, the grounded conductor shall be identified and. 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. 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. Transformers shall be enclosed, identified for the use, and listed. Luminaires over Combustible Material. The installation requirements for motor control centers are covered in 110.26 (F), and air-conditioning and refrigerating equipment are covered in Article 440. Inlets and connectors shall be permitted to be of a lower ampere rating than the branch circuit but not less than 125 percent of the luminaire load current. Part XII Special Provisions for Electric-Discharge Lighting System of 1000 Volts or Less includes 410.130(G) Disconnecting Means. Luminaires shall be permitted to be installed in commercial cooking hoods where all of the follow ing conditions are met: The luminaire shall be identified for use within commer cial cooking hoods and installed such that the tempera ture limits of the materials used are not exceeded. Listing Required. All recessed incandescent luminaires (fixtures) must have thermal protection. 410.64 Luminaires as Raceways. If you try to read the definition, it might be a little confusing trying to imagine the shape from the language. Recessed luminaires (fixtures) can be installed in the wall or ceiling. There is a concern that the lamps may fail in such a way that debris may fall onto people or combustible surfaces. That zone is 3 feet horizontally and 8 feet vertically from the tub rim or the shower threshold. Luminaires installed on dc circuits shall be equipped with auxiliary equipment and resistors designed for dc operation. 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