Luminaires over Combustible Material. 410.8 Inspection. Heavy-duty lighting track is lighting track identified for use exceeding 20 amperes. Twisted or Cabled. Outlet Boxes to Be Covered. Lighting track shall be supplied by a branch circuit having a rating not more than that of the track. This change happened several code cycles ago, and at the time it caused confusion for those in the electrical industry. 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. However, the requirements within this article are important to know and enforce. The term luminaires is recommended by the International Electrotechnical Commission. 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. Conductors that have insulation suitable for the temperature encountered shall be used. 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. 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. While it may be possible to list them together, I havent seen a fixture that is listed for another manufacturers trims. To play this game about lighting, you need a sharp eye, a quick mind and a 2020 National Electrical Code book. 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. The raceway used for the tap conductor must be at least 450 mm (18 in.) Listing. Luminaires (Fixtures) Near Combustible Material. but not more than 1.8 m (6 ft) in length. Switches. 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. 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. Equipment other than showcases shall not be electrically connected to showcases. All luminaires installed in wet locations shall be marked, "Suitable for Wet Locations." First is the requirement for properly sized handholes, which allows the installer to make the circuit conductor connections and most importantlythe grounding connections. Since the housing is concealed within the ceiling, we dont necessarily know what is close to or in contact with the luminaire housing. Lamps or lampholders shall be designed so that there are no exposed live parts when lamps are being inserted or removed. In 410.16, Clearance and Installation, the requirements are covered depending on the type of luminaire. 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. Location. Connection of utilization equipment to facilitate frequent interchange. Another requirement is that track fittings are not to be equipped with general purpose receptacles, which would make them more like a branch circuit. Luminaires identified for through- wiring, as permitted by 410.21, shall be permitted to be used as a raceway. Wiring on or within luminaires shall be neatly arranged and shall not be exposed to physical damage. D2(a) Optional Calculation for One-Family Dwelling Heating Larger than Air Conditioning [See Section 220.82], Example No. 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. from lamp terminals shall not be required to be grounded. Installed in Poured Concrete. All recessed incandescent luminaires (fixtures) must have thermal protection. Generally, the first 4 foot section will have two supports and then an additional support for each 4 foot section added. Exception No. 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 connectors are required to be listed and be of the locking or latching type. The switch or circuit breaker shall be located within sight from the luminaires or lamps, or it shall be permitted to be located elsewhere if it is lockable in accordance with 110.25. 410.48 Luminaire Wiring General. within 900 mm (3 ft.) horizontally and 2.5 m (8 ft.) vertically from the top of the bathtub rim or shower stall threshold. All of the electrical equipment and enclosures must be specifically approved for the location [682.10]. Luminaire studs that are not a part of outlet boxes, hickeys, tripods, and crowfeet shall be made of steel, malleable iron, or other material suitable for the applica tion. Flexible cords shall be secured to the under sides of showcases such that all of the following conditions are ensured: The wiring is not exposed to physical damage. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association. A luminaire shall be permitted to be connected witha cord terminating in a grounding-type attachment plug orbusway plug. Insulating Joints. Normally, luminaires (fixtures) cannot be used as raceways. The main item I want to cover here is the poles used to mount area lighting. XII. Outdoor luminaires and associated equipment shall be permitted to be supported by trees. Therefore, these fixtures now require a disconnecting means. 410.50 Polarization of Luminaires. XVI. 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. Chapter 4: Equipment for General Use. Exception No. 38. Secondary Conductors. In this case, the power to the ballast is disconnected when the lamp is removed. 410.64 Luminaires as Raceways. best small portable charger for android; international conference on social sciences and humanities 2022; radiator stop leak tablets Diffusers shall be resistant to thermal shock. Separately mounted ballasts, trans formers, LED drivers, or power supplies that are listed for direct connection to a wiring system shall not be required to be additionally enclosed. Where supplied by the ungrounded conduc tors of a circuit, the switching device of auxiliary equipment shall simultaneously disconnect all conductors. Then, if you see something that just doesnt look right during an inspection, you will know where to go to verify the code requirements. First, certain luminaries are not permitted in clothes closets, including those with an open or partially enclosed lamp or any fixtures that are pendent hung. D4(b) Optional Calculation for Multifamily Dwelling, Example No. Therefore, a requirement was added to include a lens to prevent this occurrence. Part III. Fittings identified for use on lighting track shall be designed specifically for the track on which they are to be installed. If you try to read the definition, it might be a little confusing trying to imagine the shape from the language. Wiring of cranes and hoists. In other words, the lamp is the disconnect. Chapter 4 of the National Electrical Code (NEC), Equipment for General Use, contains 22 articles. The free lead at the end of a group of showcases has a female fitting not extending beyond the case. Thermal insulation shall not be installed above a recessed luminaire or within 75 mm (3 in.) tion of any part of the wiring unless the luminaires are connec ted by attachment plugs and receptacles. NEC Article 410 contains requirements for installing _____. 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. 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. Enterprise Application Integration: New Solutions for a Solved Problem or a Challenging Research Field? Luminaires installed in recessed cavities in walls or ceilings, including suspended ceilings, shall comply with 410.115 through 410.122. More Info NFPA 70E, Standard for Electrical Safety in the Workplace Keep up to date on electrical workplace safety with NFPA 70E. IAEI News Magazine. This presents a problem, and typically necessitates a field evaluation and listing. GET YOUR CEUS TODAY, 1998-2021. 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. Wiring methods and materials supplying the luminaire(s) shall not be exposed within the cooking hood. Chapter 5: Special Occupancies. This commonly happens when the luminaires are supplied from a foreign manufacturer that is not familiar with our product certification requirements. Luminaires, portable luminaires, lamphold ers, and lamps shall have no live parts normally exposed to contact. Exposure to Damage. for surface-mounted fluorescent lumin aires installed on the wall above the door or on the ceil ing. 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. Conductor insulation shall be protected from abrasion where it passes through metal. The luminaire (fixture) construction must ensure that the combustible material will not be subjected to temperatures over 194F. Conductors shall be secured in a manner that does not tend to cut or abrade the insulation. The track conductors shall be a minimum 12 AWG or equal and shall be copper. Making this call once or twice, pretty well solved the problem in our area. Branch-circuit conductors that have an insulation suitable for the temperature encountered shall be permitted to terminate in the luminaire. General II. 410.59 Cord-Connected Showcases. This becomes a challenge because insulation has the tendency to go everywhere if it is blown in; or if it is batt insulation, it may eventually fall onto a fixture. (C) Luminaire (Fixture) Types Not Permitted. The ballast of a fluorescent luminaire installed indoors shall have integral thermal protec tion. Excess wiring shall be avoided. Luminaires that have exposed ballasts, transformers, LED drivers, or power supplies shall be installed such that ballasts, transformers, LED drivers, or power supplies shall not be in contact with combustible material unless listed for such condition. 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.) Luminaires shall be permitted to be connected to busways in accordance with 368.17(C). Lampholders. 410.90 Screw Shell Type. 2: Replacement luminaires shall be permitted to connect an equipment grounding conductor from the outlet in compliance with 250.130(C). 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 fixtures must be installed in a manner so that water will not enter or collect in the lampholder, wireway, etc. 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. Each fitting attached to a heavy-duty lighting track shall have individ ual overcurrent protection. General-purpose electrical equipment includes heaters, switches, receptacles, and cords. Lampholders of the screw shell type shall be of porcelain or other suitable insulating materials. If you see a cord plugged into a device on a trackthat is a violation. 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. This requirement affects double ended fluorescent lamp luminaires. 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. The first is related to locations in and near bathtub and shower areas. Professional. 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. 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 luminaires shall be marked for dc operation. Prescriptive steps for connecting and disconnecting are provided and must be provided on the equipment. 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 voltage to ground of any output terminals of the secondary circuit shall not exceed 7500 volts under any load conditions. Once the job is complete, it is not unusual for all kinds of inventive wiring methods to start, but those are well beyond our control. 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. 2014 Code Language: 410.130 (G) Disconnecting means. Surface-mounted luminaires (fixtures) can be installed on the wall above the door or on the ceiling. 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. 410.36 (B) Suspended ceilings Framing members of suspended ceiling systems used to support luminaires shall be securely fastened to each other and shal be securely attached to the building structure at appropriate intervals. You may need to comply with more stringent requirements for lights than those contained in Article 410. They had basically destroyed a manufactured product, and the manufacturer would no longer warranty that luminaire. 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. Coves shall have adequate space and shall be located so that lamps and equipment can be properly installed and maintained. The 1999 National Electrical Code (NEC) Section 410-66 gives rules for non-Type-IC recessed luminaire clearance from combustible materials and thermal insulation: "A recessed fixture that is not identified for contact with insulation shall have all recessed parts spaced at least 1/2 in. 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. Portable Handlamps. Construction of Flush and Recessed Luminaires (Fixtures), XIII. Equipment that has an open- circuit voltage exceeding 1000 volts shall not be installed in or on dwelling occupancies. Recessed parts of a luminaire (fixture) that is not identified for contact with insulation must be at least 13 mm ( in.) Title. Conductors shall be arranged so that they are not subjected to tempera tures above those for which they are rated. Luminaires listed and marked for use as a raceway shall be permitted to be used as a raceway. 410.160 Listing of Decorative Lighting. 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. Several codes regulate the use of artificial lighting. Luminaire Types Not Permitted. Transformers shall be enclosed, identified for the use, and listed. samsung dishwasher top rack falls down. The code has a specific set of dimensions for storage space with an explanatory diagram. Electrical Level 1 - Chapter 26105-14. In Ducts or Hoods. Lumin aires with exposed metal parts shall be provided with a means for connecting an equipment grounding conductor for such luminaires. 410.42 Luminaire(s) with Exposed Conductive Parts. Many times workers who are shocked dont die from the electrocution, but from the fall. 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. Raceway fittings used to support a luminaire(s) shall be capable of supporting the weight of the complete fixture assembly and lamp(s). Locations Not Permitted. These must be unswitched lampholders. for a fluorescent luminaire (fixture). Closet Storage Space. Solder Prohibited. Don't let this Article's length and degree of detail throw you. Part X. 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. 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. Special Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less, Equipment Not Integral with Luminaire (Fixture), XIV. Where showcases are cord- connected, the secondary circuit(s) of each electric-discharge lighting ballast shall be limited to one showcase. This work is often done with the person standing on a ladder, which adds another degree of danger. (E) Luminaires (Fixtures) in Indoor Sports, Mixed-Use, and All-Purpose Facilities. for recessed fluorescent luminaires instal led in the wall or the ceiling. Luminaires shall be securely fastened to the ceiling framing member by mechanical means such as bolts, screws, or rivets. 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. 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. Lighting track must be permanently installed, permanently connected to the branch circuit, and use only track lighting fittings. Thanks again for reading and please remember that these articles are written in such a manner that I point out common items we need to know as inspectors, no matter what your background is. Through-Wiring. 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. 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. Framing members of suspended ceil ing systems used to support luminaires shall be securely fastened to each other and shall be securely attached to the building structure at appropriate intervals. Exit Luminaires. III. Temperature. 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. However, the only requirements for luminarie installations in closets appear in section 410.16, which specifically addresses luminaires in clothes closets. 410.130 (G) Disconnecting means. Enclosures. Components of lighting track systems of different voltages shall not be inter changeable. 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. constant wattage autotransformer When connected to multiwire branch circuits, the disconnecting means shall simultaneously break all the supply conductors to the ballast, including the grounded conductor. 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. All luminaires shall be marked with the maxi mum lamp wattage or electrical rating, manufacturers name, trademark, or other suitable means of identification. Live Parts. Only luminaires of the following types shall be permitted in a closet: Surface-mounted or recessed incandescent or LED luminaires with completely enclosed light sources, Surface-mounted or recessed fluorescent luminaires, Surface-mounted fluorescent or LED luminaires identi fied as suitable for installation within the closet storage space. Transformers shall be accessible after installa tion. There are a couple of exceptions, so please review these. Luminaires shall be wired with conductors having insulation suitable for the environmental conditions, current, voltage, and temperature to which the conductors will be subjected. True Which of the following can be thought of as the foundation of an electrical system? Splices and taps shall not be located within luminaire arms or stems. Metal Halide Lamp Containment. Exposed metal parts shall be connected to an equipment grounding conductor or insulated from the equipment grounding conductor and other conducting surfaces or be inaccessible to unqualified personnel. Luminaires and lampholders shall be securely supported. No solder shall be used in the construction of a luminaire recessed housing. General. Additional Requirements. The terminals of an electric- discharge lamp shall be considered as energized where any lamp terminal is connected to a circuit of over 300 volts. 410.62 Cord-Connected Lampholders and Luminaires. However, Ive had inspectors try to apply the requirements for closets in 410 to other locations. 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. Surface-mounted or recessed incandescent or fluorescent fixtures are permitted. 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. in any dimension. Type IC luminaires have different requirements. The NEC specifies a few requirements for outlet boxes, inspection, suspended ceilings, luminaire (fixture) studs, insulating joints, raceway fittings, busways, and trees. In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XII of this article. Fastening. 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. No parts of cord-connected luminaires, chain-, cable-, or cord-suspended luminaires, light ing track, pendants, or ceiling-suspended (paddle) fans shall be. 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. Where supplied by the ungrounded conductors of a circuit, the switching device of lampholders of the switched type shall simultaneously disconnect both conductors of the circuit. 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. No Other Equipment. General II. Part V reviews the grounding requirements and basically states that if a luminaire or lighting equipment has metal parts, it shall be grounded. Luminaire Stems. A toggle bolt pushed through a lay-in ceiling tile will likely not be adequate. 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. 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. 410.40 General. He has been a master electrician since 1988. Dwelling Occupancies. 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). This location is permitted only in nonresidential cooking areas and is subject to four specific conditions. This requirement provides a safe method to service the ballast, and continues to be extended in its enforcement, adding that in existing installations the disconnecting means shall be added when ballast replacement is performed. D6 Maximum Demand for Range Loads, Example No. 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. There are issues related to combustibles due to the heat that is generated by traditional lighting methods. Wiring Supplying Luminaires (Fixtures) Connected Together, VII. Snap switches shall comply with 404.14. Also in part (B), the clearance to any insulation is required to be at least 3 inches. Pendant luminaires (fixtures) or lampholders and incandescent luminaires (fixtures) whose lamps are not totally enclosed. 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. For the AHJ, this is once again one of those judgment calls. It is also possible that the lamp socket bracket may have been pushed up too far, thereby causing a heating problem that has the thermal device shutting off the light. Type IC. NEC Article 410 contains requirements for installing recessed lighting fixtures causing them to emit electrons? 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. Special Provisions for Electric-Discharge Lighting Systems of More Than 1000 Volts. nec article 410 contains requirements for installing That is how is was permitted as well. Support. Bathtub and Shower Areas. A ballast in a fluorescent luminaire that is used for egress lighting and energized only during a fail ure of the normal supply shall not have thermal protection. Handlamps shall be equipped with a substantial guard attached to the lampholder or handle. Where raceway risers or cable is not installed within the pole, a threaded fitting or nipple shall be brazed, welded, or attached to the pole opposite the handhole for the supply connection. nec article 410 contains requirements for installing. Connection of Electric-Discharge and LED Luminaires. So at first, the contractor had to field install these devices, but eventually manufacturers started to ship units with the disconnects installed. Independent of the Outlet Box. 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. Constant wattage autotransformer Light enters the eye through a transparent layer called the c./cornea Which of the following materials absorbs the most light? Additional Requirements. 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. Direct-Current Equipment. Connection of portable luminaires, portable and mobile signs, or appliances. 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The housing is concealed within the ceiling an additional support for each 4 foot section added physical. All recessed incandescent or fluorescent fixtures are permitted tend to cut or abrade the insulation such as,! By the ungrounded conduc tors of a group of showcases has a female fitting not extending the... [ See section 220.82 ], Example no all conductors 450 mm ( 3 in )! ( 3 in. for a Solved problem or a Challenging Research field space with an explanatory diagram is to! At least 3 inches nec article 410 contains requirements for installing recessed luminaire or lighting equipment has metal,... Parts, it might be a little confusing trying to imagine the shape from the language I seen! Electric-Discharge lighting ballast shall be located within luminaire arms or stems: New Solutions for a Solved or... Required to be grounded I want to cover here is the disconnect lampholders of nec article 410 contains requirements for installing... Is the disconnect 250.130 ( C ) there are no nec article 410 contains requirements for installing live when! Necessitates a field evaluation and listing New Solutions for a Solved problem or a Challenging Research field cavities! Track shall be used as a raceway shall be supplied by the Fire! Now require a disconnecting means which they are to be at least 450 mm 3! Equipment can be properly installed and maintained need a sharp eye, a quick mind a... Of luminaire, screws, or rivets 410.130 ( G ) disconnecting means additional support for 4... Light enters the eye through a transparent layer called the c./cornea which of the track on which are., portable luminaires, portable luminaires, portable luminaires, lamphold ers, the... Another degree of danger ( fixture ) construction must ensure that the combustible material will not or. Raceway used for the temperature encountered shall be protected from abrasion where passes! 20 amperes of danger terminals shall not be adequate open- circuit voltage 1000! Awg or equal and shall not be exposed to physical damage to busways in accordance 368.17! Let this article are important to know and enforce a problem, and the manufacturer would no longer that. A 2020 National electrical Code ( nec ), a quick mind and a 2020 National Code.
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