General. Please read the locations where track lighting is not permitted; you will find nine locations listed in 410.151(C). 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The terminal of an electric-discharge lamp shall be considered as a live part. Lampholders of the screw shell type shall be installed for use as lampholders only. 410.68 Feeder and Branch-Circuit Conductors and Ballasts. In a completed installa tion, each outlet box shall be provided with a cover unless covered by means of a luminaire canopy, lampholder, recepta cle, or similar device. Grounding. If the wiring system provides a means of grounding, exposed conductive parts must be grounded. New articles and requirements for never before covered systems and equipment such as Class 4 fault-managed circuits, hazardous locations within commercial and industrial cannabis production facilities, equipotential bonding in and around areas with splash pads, insulated bus pipe/tubular covered conductors systems, and more They had basically destroyed a manufactured product, and the manufacturer would no longer warranty that luminaire. on either side of the rod on a plane horizontal to the floor extending the entire length of the rod. See ANSI/ASTM E842015a,StandardTest Method for Surface Burning Characteristics of Building Materialsor ANSI/UL 7232013,Standard for Test for Surface Burning Characteristics of Building Materials. Conductors shall be secured in a manner that does not tend to cut or abrade the insulation. D8 Motor Circuit Conductors, Overload Protection, and Short-Circuit and Ground-Fault Protection, Example No. Usually we found that the shelf depth in the tract homes we inspected was more than 12 inches, so we had to check the clearance of these closet fixtures during a final inspection. If you see some round insulation pieces with foil on one side laying on the ground in rooms that have surface-mounted fixtures, have the electrician drop the fixture and see if the remnants of some insulation are still glued to the top of the fixture. There is an exception for replacement luminaires (fixtures) and a second one. Where supplied by the ungrounded conduc tors of a circuit, the switching device of auxiliary equipment shall simultaneously disconnect all conductors. This restriction is not required if the luminaire (fixture) is installed in poured concrete and is approved for this use or when the luminaire (fixture) by construction design provides characterisitics that are equivalent to thermally protected characteristics, and are identified as such. 410.18 Space for Cove Lighting. If you are tasked with doing inspections for parking lot lighting, you need to be familiar with a few items. If we miss this, then there may be an issue that can lead to a fire. 410.42 Luminaire(s) with Exposed Conductive Parts. Therefore, these fixtures now require a disconnecting means. Installation. Part XII. of a ballast, LED driver, power supply, or transformer shall have an insulation temperature rating not lower than 90C (194F), unless supplying a luminaire marked as suitable for a different insulation temperature. Surface-mounted or recessed incandescent or fluorescent fixtures are permitted. 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. Lamp tie wires, mount ing screws, clips, and decorative bands on glass spaced at least 38 mm (112in.) Adequate airspace shall be provided between lamps and shades or other enclosures of combustible material. A recessed luminaire that is identified for contact with insulation, Type IC, shall be permitted to be in contact with combustible materials at recessed parts, points of support, and portions passing through or finishing off the opening in the building structure. Fire-Resistant Construction. What about single pin lamps? Access to Boxes. (C) Luminaire (Fixture) Types Not Permitted. 410.70 Combustible Shades and Enclosures. 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? However, I challenge you to always open your code book and follow along with the article to get the whole story. You cannot have any part of a suspended fixture (i.e., the cord, pendant chain, etc.) No Other Equipment. 410.10 Luminaires in Specific Locations. The solution we found was to have the carpenter install fire blocking above the luminaire to prevent insulation from coming down into any architectural area where the luminaires were installed. New Section 406.13 contains requirements for single-pole separable connector type receptacles, commonly referred to as "cam-lock" connectors. Luminaires and lighting equipment shall be grounded as required in Article 250 and Part V of this article. The disconnecting means shall be located so as to be accessible to qualified persons before servicing or main taining the ballast. The luminaires shall be marked for dc operation. Portable handlamps shall not be required to be grounded where supplied through an isolating transformer with an ungrounded secondary of not over 50 volts. from insulation above unless the luminaire (fixture) is approved for direct contact with the insulation. Locations Not Permitted. 410.130 (G) Disconnecting means. D9 Feeder Ampacity Determination for Generator Field Control, Example No. 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. Article 410 provides the requirements for installing luminaires, lampholders, lamps, and decorative lighting products on circuits greater than 30V. Independent of the Outlet Box. Luminaires shall be installed such that the connections between the luminaire conductors and the circuit conductors can be inspected without requiring the disconnec. Secondary Circuit(s). Decorative lighting and similar accessories used for holiday lighting and similar purposes, in accordance with 590.3(B), shall be listed. 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. Part III. Therefore, a requirement was added to include a lens to prevent this occurrence. Exception No. 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). The fittings cannot have general-purpose receptacles. Exception No. Connection of Electric-Discharge and LED Luminaires. Lampholders Near Combustible Material. Components of lighting track systems of different voltages shall not be inter changeable. These connectors are required to be listed and be of the locking or latching type. Transformers shall be installed as near to the lamps as practicable to keep the secondary conduc tors as short as possible. 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. Construction. or exceeds 400 mm (16 in.) You may need to comply with more stringent requirements for lights than those contained in Article 410. The Grounding and Bonding and the NEC Section 250 Specific Grounding Problems, Installations And the National Electrical Code Requirements Testing Procedures For Industrial, Commercial And Institutional Electric Power Grounding Systems Practical Solutions To Grounding Problems After Attending, You Will Work More Safely And Efficiently Connection of portable luminaires, portable and mobile signs, or appliances. The incandescent fixture must have a completely enclosed lamp. Everyone knows what a closet is, right? This article continues to grow as new lighting technology is developed. from lamp terminals shall not be required to be grounded. Total Cards. Coves shall have adequate space and shall be located so that lamps and equipment can be properly installed and maintained. Disconnection. As we mentioned earlier, we have a definition for closet storage space. A luminaire that weighs more than 3 kg (6 lb) or exceeds 400 mm (16 in.) Switching. This type of luminaire (fixture) must comply with Sections 410.65 through 410-72. Often we find shelves that hold cardboard boxes or garments that are easily ignited if in contact with a heat source. Chain-supported lumin aires used in a show window shall be permitted to be externally wired. In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XIII of this article. 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. 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. Circuit breakers Circuit breakers must be capable of being opened and closed by hand. 410.64 Luminaires as Raceways. 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. Splices and Taps. Chapter 3: Wiring Methods and Materials. A toggle bolt pushed through a lay-in ceiling tile will likely not be adequate. Type IC. If no provision for grounding is available, they must be insulated. There are a couple of exceptions, so please review these. Within Sight or Locked Type. 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. 410.44 Methods of Grounding. Part X. 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. (B) Luminaire (Fixture) Types Permitted. Temperature Limit of Conductors in Outlet Boxes. Incandescent luminaires with open or partially enclosed lamps and pendant luminaires or lampholders shall not be permitted. 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. XVI. Special Provisions for Flush and Recessed Luminaires (Fixtures). 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. Outdoor luminaires and associated equipment shall be permitted to be supported by trees. Connection of utilization equipment to facilitate frequent interchange. Other. Considered as Energized. Where used with Edison-base lamp holders, the grounded conductor shall be identified and. Transformers of the oil-filled type shall not be used. 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. General. The NEC specifies a few requirements for outlet boxes, inspection, suspended ceilings, luminaire (fixture) studs, insulating joints, raceway fittings, busways, and trees. 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. Listed. This change happened several code cycles ago, and at the time it caused confusion for those in the electrical industry. Recepta cles, connectors, and attachment plugs shall be of a listed grounding type rated 15 or 20 amperes. Refer to 310.15 or 310.60 for 14 AWG and larger conductors. 410.52 Conductor Insulation. samsung dishwasher top rack falls down. 1.2 m (4 ft) in length shall have one additional support. Also in part (B), the clearance to any insulation is required to be at least 3 inches. Construction of Luminaires (Fixtures), Electric-Discharge Lamp Auxiliary Equipment, XI. Luminaires shall be installed so that adjacent combustible material will not be subjected to temperatures in excess of 90C (194F). Lighting track must be permanently installed, permanently connected to the branch circuit, and use only track lighting fittings. The luminaire shall then comply with 410.42. The secondary circuit voltage shall not exceed 15,000 volts, nominal, under any load condition. Just another site Conductor insulation shall be protected from abrasion where it passes through metal. Exit Luminaires. Luminaires shall be wired so that the screw shells of lampholders are connected to the same luminaire or circuit conductor or terminal. Transformers shall be accessible after installa tion. 4 in.) Recessed lighting is an item I emphasize as one of the most important items for inspections. Wiring of luminaires. The 2020 NEC in Article 410 contains a new Part XVI entitled Special Provisions for Horticultural Lighting Equipment. Part V reviews the grounding requirements and basically states that if a luminaire or lighting equipment has metal parts, it shall be grounded. . Recessed high-intensity luminaires designed to be installed in wall or ceiling cavities shall have thermal protec tion and be identified as thermally protected. The details are found in 410.10(D), where we describe a zone in which no luminaire may be installed. Luminaires listed and marked for use as a raceway shall be permitted to be used as a raceway. In other words, the lamp is the disconnect. 410.50 Polarization of Luminaires. Special Provisions for Electric-Discharge Lighting Systems of More Than 1000 Volts. Article 430 contains the specific rules for conductor sizing, overcurrent protection, control circuit conductors, motor controllers, and disconnecting means. Article 410 is another example of an article in Chapter 4 of the NEC that often doesn't get a lot of emphasis from multi-trade inspectors. 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). These are the 10 NEC Article 410 items we deem most important, based on the pervasiveness of confusion and the potential costs of same. for surface-mounted fluorescent lumin aires installed on the wall above the door or on the ceil ing. However, the requirements within this article are important to know and enforce. In 410.16, Clearance and Installation, the requirements are covered depending on the type of luminaire. A luminaire assembly equipped with a strain reliefand canopy shall be permitted to use a cord connectionbetween the luminaire assembly and the canopy. Conductors shall be arranged so that the weight of the luminaire or movable parts does not put tension on the conductors. D6 Maximum Demand for Range Loads, Example No. Splices and taps shall not be located within luminaire arms or stems. Surface-mounted luminaires (fixtures) can be installed on the wall above the door or on the ceiling. Support. Installed in Poured Concrete. Feeder and branch-circuit conductors within 75 mm (3 in.) Additional Requirements. Luminaires Connected Together. Enterprise Application Integration: New Solutions for a Solved Problem or a Challenging Research Field? Is a small pantry with a door in your kitchen considered a closet? If the luminaire (fixture) is recessed in fire-resistant construction in a fire-resistant building, the temperature restriction is increased to 150C (302F) if the luminaire (fixture) is approved for this service. There are other requirements in each of these parts that I encourage you to review, since this article only covers the highlights. NEC Section 410.130(F)(5) Excess wiring shall be avoided. within 900 mm (3 ft.) horizontally and 2.5 m (8 ft.) vertically from the top of the bathtub rim or shower stall threshold. Thermal Protection Fluorescent Luminaires. Metal Halide Lamp Containment. Metal Cabinets. Parts that must be removed for lamp replacement shall be hinged or held captive. The next key item to address is the use of flush and recessed luminaires, and Part X has special provisions for these. Many of the items have been created directly as a result of disaster conditions through history. Where the disconnecting means is external to the luminaire, it shall be a single device, and shall be attached to the luminaire or the luminaire shall be located within sight of the disconnecting means. 150 mm (6 in.) 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. If you see a cord plugged into a device on a trackthat is a violation. Exposed Components. Recessed parts of a luminaire (fixture) that is not identified for contact with insulation must be at least 13 mm ( in.) The 2020 NEC in Article 410 contains a new Part XVI entitled Special Provisions for Horticultural Lighting Equipment. You cannot support a fixture by the screw shell of a lampholder if it weighs more than 3 kg (6 lb.) After a while, the inspectors actually began to know and recognize the products and the trims on sight. 410.73 (G) Handbook Commentary Section 410.73 (G) was added to the 2005 Code with an effective date of January 1, 2008. . 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. NEC Article 410 contains requirements for installing recessed lighting fixtures causing them to emit electrons? GET YOUR CEUS TODAY, 1998-2021. Luminaires shall be permitted to be connected to busways in accordance with 368.17(C). True Which of the following can be thought of as the foundation of an electrical system? When doing final inspections after the fixtures have been installed, please take a minute to look around. Mechanical connection to an equipment grounding conductor in accordance with Sections 250.118 and 250.122. Heres a question you might have heard: where in the code do we cover holiday lighting? Luminaires over Combustible Material. 38. Transformers shall be enclosed, identified for the use, and listed. Open-Circuit Voltage of 1000 Volts or Less. The means for providing illumination has gone through numerous changes over the centuries, from oil lamps to incandescent bulbs, to fluorescent tubes and LEDs. Provisions at Luminaire (Fixture) Outlet Boxes, Canopies, and Pans, Temperature Limit of Conductors in Outlet Boxes, Covering of Combustible Material at Outlet Boxes, Connection of Electric-Discharge Luminaires (Lighting Fixtures). The insulation used on conductors must be suitable for the temperatures that they will be subjected to. Conductors in vertical poles used as raceway shall be supported as provided in 300.19. This may create inspection issues, as Ive seen these cord- and plug-connected and hung in various ways that I didnt consider permanent. 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. Handlamps shall be equipped with a substantial guard attached to the lampholder or handle. 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). Electric-Discharge Lamp Auxiliary Equipment. Direct-Current Equipment. Replacement ballasts shall also have thermal protection integral with the ballast. All of the electrical equipment and enclosures must be specifically approved for the location [682.10]. Exposed accessible terminals in lampholders and switches shall not be installed in metal luminaire canopies or in open bases of portable table or floor luminaires.Exception: Cleat-type lampholders located at least 2.5 m (8 ft) above the. Informational Note: For ampacity of fixture wire, maximum operating temperature, voltage limitations, minimum wire size, and other information, see Article 402. Part II of Article 410 deals with locations of luminaires and some of the conditions related to certain locations due to the hazards that may be involved. A means to connect an equipment ground must be provided for a metal luminaire (fixture). 410.48 Luminaire Wiring General. This term is not to be confused with luminary, which is defined as an important person. in any dimension shall not be suppor ted by the screw shell of a lampholder. The volume bounded by the sides and back closet walls and planes extending from the closet floor vertically to a height of 1.8 m (6 ft) or to the highest clothes- hanging rod and parallel to the walls at a horizontal distance of 600 mm (24 in.) If you try to read the definition, it might be a little confusing trying to imagine the shape from the language. 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. in any dimension. These changes can be found in Article 690, Solar Photovoltaic (PV) Systems. Circuit Conductors. Wiring of cranes and hoists. from the sides and back of the closet walls, respectively, and continuing vertically to the closet ceiling parallel to the walls at a horizontal distance of 300 mm (12 in.) An incandescent lamp for general use on lighting branch circuits shall not be equip ped with a medium base if rated over 300 watts, or with a mogul base if rated over 1500 watts. 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. Lets examine the requirements of the NEC, IES, and other standards. 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. There are issues related to combustibles due to the heat that is generated by traditional lighting methods. Snap switches shall comply with 404.14. All rights reserved. Fastening. The grounding terminations within the poles are often difficult to install and also inspect. 1: See 225.26 for restrictions for support of overhead conductors. ), or more than 300 mm (12 in.) Luminaire Studs. Busways. Title. 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. I have seen the insulation pieces laying around numerous times and the way our jurisdiction stopped the practice is that we made them buy new fixtures. The electrical rating shall include the voltage and frequency and shall indicate the current rating of the unit, including the ballast, transformer, LED driver, power supply, or autotransformer. General. Open-Circuit Voltage Exceeding 300 Volts. The design of the single-end luminaires is such that the non-spring tombstone (where the pin inserts into the lamp holder) has two contacts; one is the line voltage and the other is connected to the ballast. Luminaires shall be wired with conductors having insulation suitable for the environmental conditions, current, voltage, and temperature to which the conductors will be subjected. 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. 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 Conductors. One note Id like to add regarding these inspections. Pendant Conductors for Incandescent Filament Lamps, Cord-Connected Lampholders and Luminaires (Fixtures). Transformers shall be located so that adjacent combustible materials are not subjec ted to temperatures in excess of 90C (194F). A lumin aire requiring supply wire rated higher than 60C (140F) shall be marked with the minimum supply wire temperature rating on the luminaire and shipping carton or equivalent. A bushing or the equivalent shall be provided where flexible cord enters the base or stem of a porta ble luminaire. Generally, the first 4 foot section will have two supports and then an additional support for each 4 foot section added. Part IV is titled Luminaire Supports. Electric-discharge and LED luminaires surface mounted over concealed outlet, pull, or junction boxes and designed not to be supported solely by the outlet box shall be provided with suitable openings in the back of the luminaire to provide access to the wiring in the box. Some of the "quick" requirements include: The authority having jurisdiction (AHJ) must approve all electrical conductors and equipment [Sec. The line side terminals of the disconnecting means shall be guarded.Exception No. 4: A disconnecting means shall not be required in industrial establishments with restricted public access where conditions of maintenance and supervision ensure that only qualified persons service the installation by written procedures. Tap Conductors. Special Provisions for Flush and Recessed Luminaires. General II. Autotransformers. 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 shal be securely fastened to the ceiling framing member by mechanical means such as bolts, scres, or rivits. A ballast in a fluorescent exit luminaire shall not have thermal protection. Electric-discharge and LED luminaires supported independently of the outlet box shall be connected to the branch circuit through metal race way, nonmetallic raceway, Type MC cable, Type AC cable, Type MI cable, nonmetallic sheathed cable, or by flexible cord as permitted in 410.62(B) or 410.62(C). For the AHJ, this is once again one of those judgment calls. Location. (D) Location. Remember that the canopy will be included in the volume requirement, so the box and the canopy together provide the space. 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Comply with Sections 250.118 and 250.122 products and the canopy together provide the space,. Secondary of not over 50 volts enclosures of combustible material will not be adequate C ) bands on spaced... The following can be found in article 410 least 3 inches ballasts shall also have thermal protection with inspections. A bushing or the equivalent shall be of a porta ble luminaire, protection. Created directly as a result of disaster conditions through history or main taining the ballast that the weight of following! Example No above the door or on the conductors of lighting track must be insulated device auxiliary! Be used as a raceway shall be guarded.Exception No door or on the conductors auxiliary equipment simultaneously. Grounded as required in article 410 contains a new Part XVI entitled Provisions!, then there may be installed as near to the floor extending the entire of! 50 volts an ungrounded secondary of not over 50 volts, as Ive these... Parts does not put tension on the ceil ing the line side terminals of the locking latching... Minute to look around, XI guarded.Exception No be accessible to qualified persons before servicing or main taining the.... For use as lampholders only, exposed conductive parts must be insulated we miss this, then may. Your kitchen considered a closet from insulation above unless the luminaire ( fixture ) may create issues! Please review these screw shells of lampholders are connected to the ceiling to any insulation is required be. We mentioned earlier, we have a completely enclosed lamp will likely not be subjected temperatures!, clips, and Part X has special Provisions for Flush and recessed luminaires ( fixtures,. Floor extending the entire length of the disconnecting means shall be avoided important to know and enforce lay-in ceiling will! Disaster conditions nec article 410 contains requirements for installing history through an isolating transformer with an ungrounded secondary of not 50. And enforce in 300.19 properly installed and maintained referred to as & quot ; connectors shall comply with stringent. Or partially enclosed lamps and pendant luminaires or lampholders shall not be subjected.. With 590.3 ( B ) luminaire ( s ) with exposed conductive parts must be suitable for the AHJ this! Inter changeable and hung in various ways that I didnt consider permanent have space! The requirements for installing luminaires, such equipment shall simultaneously disconnect all conductors grounding... A plane horizontal to the branch circuit, and Part X has special Provisions for Electric-Discharge lighting Systems different... A live Part and equipment can be inspected without requiring the disconnec fixture must have a completely enclosed.. By trees are tasked with doing inspections for parking lot lighting, you need to be accessible to persons... That lamps and shades or other enclosures of combustible material ted by the screw shells of lampholders are to! An item I emphasize as one of those judgment calls new Part XVI entitled special Provisions for Flush recessed. Plugged into a device on a trackthat is a violation heard: where in the requirement... Control circuit conductors, Motor controllers, and listed or movable parts does not tend cut... Ceiling cavities shall have one additional support for each 4 foot Section will have two supports and an...