Electrical safety of an electric utility system's transmission and distribution facilities, substations and generation fall under the National Electrical Safety Code , Article 410.A.3 (2007).
Instant-start lamps contain a? All luminaires shall be marked with the maxi mum lamp wattage or electrical rating, manufacturers name, trademark, or other suitable means of identification.
Thermal Protection Fluorescent Luminaires.
For some reason, these are not commonly purchased with an IC rating.
Provisions at Luminaire Outlet Boxes, Canopies, and Pans.
Luminaires Connected Together. Splices and Taps.
but not more than 1.8 m (6 ft) in length.
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 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. Exception No. Conductor insulation shall be protected from abrasion where it passes through metal.
The voltage to ground of any output terminals of the secondary circuit shall not exceed 7500 volts under any load conditions. Service neutral conductor within the service equipment enclosure. Diffusers shall be resistant to thermal shock.
Support. Transformers shall have a secondary short-circuit current rating of not more than 150 mA if the open-circuit volt age is over 7500 volts, and not more than 300 mA if the open- circuit voltage rating is 7500 volts or less.
Decorative lighting and similar accessories used for holiday lighting and similar purposes, in accordance with 590.3(B), shall be listed.
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.
Inherently Protected.
tion of any part of the wiring unless the luminaires are connec ted by attachment plugs and receptacles.
Luminaires identified for through- wiring, as permitted by 410.21, shall be permitted to be used as a raceway. Cord- and plug-connected luminaires, if you install an accessible separable connector (or an accessible plug and receptacle) as the disconnecting means [410.130(G)(1), Exception No. A simple reactance ballast in a fluorescent luminaire with straight tubular lamps shall not be required to be thermally protected.
Now lets review the definition in 410.2, which further defines what closet storage space is within a clothes closet. Five exceptions exist in the 2011 Code, so please review. for surface-mounted incandescent or LED luminaires with an enclosed light source.
Menu Close 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. Where showcases are cord- connected, the secondary circuit(s) of each electric-discharge lighting ballast shall be limited to one showcase.
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. Coves shall have adequate space and shall be located so that lamps and equipment can be properly installed and maintained. Most of these code requirements focus on protecting combustible building materials from temperature greater than 90C (194F).
Surface or recessed fluorescent luminaires.
If of the wire type, the circuit equipment grounding conductor must be sized in accordance with 250.122, based on the rating of the overcurrent device [410.44].
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. I should mention here that we use the term luminaires as a more international reference to lighting fixtures. Requirements here also mention that adequate wiring space shall be provided for proper connections.
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.
The next important item is 410.6, which states that all luminaires and lamp holders shall be listed.
Luminaires listed and marked for use as a raceway shall be permitted to be used as a raceway.
Simple Reactance Ballasts. The emergency illumination required in 700.16 [410.130(G)(1), Exception No.
Luminaires that use a metal halide lamp other than a thick-glass parabolic reflector lamp (PAR) shall be provided with a containment barrier that encloses the lamp, or shall be provided with a physical means that only allows the use of a lamp that is Type O.Informational Note: See ANSI Standard C78.389, General.
Many times workers who are shocked dont die from the electrocution, but from the fall.
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.
Lampholders installed in wet locations shall be listed for use in wet locations. 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. 
Luminaires, portable luminaires, lamphold ers, and lamps shall have no live parts normally exposed to contact.
Parts VI through IX deal with items generally covered by the manufacturers of the luminaires. Listing.
After a while, the inspectors actually began to know and recognize the products and the trims on sight. Constant wattage auto transformer. With the increasing popularity of LED luminaires, the Code needed to address requirements for their installation.
410.46 Equipment Grounding Conductor Attachment. for recessed incandescent or LED lumin aires with a completely enclosed light source installed in the wall or the ceiling. Closet Storage Space. between the first case and the supply receptacle.
Luminaires shall be wired with conductors having insulation suitable for the environmental conditions, current, voltage, and temperature to which the conductors will be subjected.
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. Conductors that have insulation suitable for the temperature encountered shall be used. Outlet Boxes. Generally, the first 4 foot section will have two supports and then an additional support for each 4 foot section added. Heavy-duty lighting track is lighting track identified for use exceeding 20 amperes.
Replacement ballasts shall also have thermal protection integral with the ballast.
Luminaires must be connected to an equipment grounding conductor of a type recognized in 250.118.
This work is often done with the person standing on a ladder, which adds another degree of danger.
Equipment other than showcases shall not be electrically connected to showcases. from the sides and back of the closet
410.54 Pendant Conductors for Incandescent Filament Lamps. Multiwire Branch Circuits. 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).
Dwelling Occupancies. 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. 1: Luminaires made of insulating material that is directly wired or attached to outlets supplied by a wiring method that does not provide a ready means for grounding attachment to an equip ment grounding conductor shall be made of insulating material and shall have no exposed conductive parts.
nec article 410 contains requirements for installing nec article 410 contains requirements for installing A luminaire that weighs more than 3 kg (6 lb) or exceeds 400 mm (16 in.) 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.
D9 Feeder Ampacity Determination for Generator Field Control, Example No. 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.
General.
410.2 Definition.
410.48 Luminaire Wiring General. These are very commonly used in residential construction and are a very important part of the residential inspection process.
IAEI News Magazine.
This includes disconnecting the neutral conductor, otherwise, a false sense of security can result in an unexpected shock.
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.
Exposure to Damage.
No Other Equipment.
These luminaries are commonly worked on without the removal of power, thus creating a shock hazard to the person performing the work. Please read the locations where track lighting is not permitted; you will find nine locations listed in 410.151(C).
In this case, the power to the ballast is disconnected when the lamp is removed. Such tap conductors shall be in suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) 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.
Part IV is titled Luminaire Supports.
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.
A luminaire shall be permitted to be connected witha cord terminating in a grounding-type attachment plug orbusway plug.
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.
Making this call once or twice, pretty well solved the problem in our area. Luminaires connected together can include wiring to feed the interconnected luminaires, within limits [410.64(C)] (.
In the 2020 NEC, a new part XVI was added to Article 410 to address the special considerations related to horticultural lighting and related equipment.
410.59 Cord-Connected Showcases.
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.
The luminaires shall be marked for dc operation.
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. If an existing luminaire doesnt have such a disconnect, the 2011 NEC now requires you to add it when you replace the ballast for that luminaire (Fig.
In the 2020 NEC, a new part XVI was added to Article 410 to address the special considerations related to horticultural lighting and related equipment.
Separate Mounting. However, its wording inadvertently required special identification for the application of an LED luminaire in a closet.
In Part III of 410, we cover mainly outlet boxes and canopies for luminaires. Type IC. Twisted or Cabled.
1.2 m (4 ft) in length shall have one additional support. Lampholders must be constructed, installed, or equipped with shades or guards so that combustible material isnt subjected to temperatures in excess of 90C (194F)..
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. In addition to complying with the general requirements for luminaires, such equipment shall comply with Part XII of this article. WebUntil now, there has never been anything specifically in Article 344 permitting RMC to be used where protection from severe physical damage was required, yet several other code articles besides Article 344 permit RMC as a solution where physical damage may occur. bunkers for sale in california. 410.110 General. Many of the items have been created directly as a result of disaster conditions through history. The bushing shall be of insulating material unless a jacketed type of cord is used.
Because LED drivers and electric-discharge luminaires are similar, the logical place to include LED requirements is alongside electric-discharge luminaires.
The reason? Many of the items have been created directly as a result of disaster conditions through history.
If you are tasked with doing inspections for parking lot lighting, you need to be familiar with a few items.
Fittings identified for use on lighting track shall be designed specifically for the track on which they are to be installed.
https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/, Article 410 provides the requirements for installing luminaires, lampholders, lamps, and decorative lighting products on larger voltage systems, Top Changes to the 2023 National Electrical Code, 8 Types of Electrical Conduit and Their Uses, Electrical Conduit is an Important Part of Protecting Power & Transmission Lines from Wind & Fire, NEC Requirements for Overvoltage Protection, Thomas J. Gretz Named President of Arlington Industries. Listed clips identified for use with the type of ceiling framing member(s) and lumin aire(s) shall also be permitted.
Luminaires installed in recessed cavities in walls or ceilings, including suspended ceilings, shall comply with 410.115 through 410.122.
However, the requirements within this article are important to know and enforce.
WebNEC Article 410 contains requirements for installing? 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. Enclosures. But does it, actually?
Installed in Poured Concrete.
Circuit Conductors. So at first, the contractor had to field install these devices, but eventually manufacturers started to ship units with the disconnects installed. Menu Close Additional Requirements. The 2008 NEC added allowances for LED luminaires in clothes closets [410.16].
The next key item to address is the use of flush and recessed luminaires, and Part X has special provisions for these. Specify and install only equipment that conforms to these requirements.
When an electric-discharge luminaire or LED luminaire is surface-mounted over a concealed outlet box and not supported by the outlet box, the luminaire must be provided with suitable openings that permit access to the branch circuit wiring within the outlet box [410.24(B)] (.
Lighting track shall be grounded in accord ance with Article 250, and the track sections shall be securely coupled to maintain continuity of the circuitry, polarization, and grounding throughout. The second change in the 2020 NEC that effects residential electrical services requires an emergency disconnect to be installed for the service.
Luminaire Types Not Permitted. Splices and taps shall not be located within luminaire arms or stems. 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.) Integral Thermal Protection. The second change in the 2020 NEC that effects residential electrical services requires an emergency disconnect to be installed for the service. Luminaires installed on dc circuits shall be equipped with auxiliary equipment and resistors designed for dc operation. 3:GFCI-protected replacement luminaires arent required to be connected to an equipment grounding conductor of a type recognized in 250.118 if no equipment grounding conductor exists at the outlet box.
While that requirement certainly makes sense, theres a gaping hole in the rule it doesnt address lampholders.
WebNEC Article 410 contains requirements for installing?
For common inspections, it is important to verify that the outlet boxes are covered; this is usually done by the fixture and/or the canopy.
The last item I will cover in this article is Part XIV Lighting Track, or as it is more commonly called, track lighting. Voltage.
When connected to multiwire branch circuits, the disconnecting means shall simultaneously break all the supply conductors to the ballast, including the grounded conductor.
If you try to read the definition, it might be a little confusing trying to imagine the shape from the language. Live Parts.
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.
Raceway fittings used to support a luminaire(s) shall be capable of supporting the weight of the complete fixture assembly and lamp(s). For the AHJ, this is once again one of those judgment calls.
The luminaire is mounted directly below the outlet box, and, Isnt subject to strain or physical damage [400.10], and.
Conductors shall be arranged so that the weight of the luminaire or movable parts does not put tension on the conductors.
ballast that provide high voltage across the lamp's electrodes at startup, causing them to emit electron Which of the following is an HID ballast category? Exception No.
When fluorescent luminaires are on multiwire branch circuits, the disconnect must simultaneously break all circuit conductors of the ballast.
Another requirement is that track fittings are not to be equipped with general purpose receptacles, which would make them more like a branch circuit. In previous editions of the NEC, to see if you could use a luminaire as a raceway, youd find your answer in 410.64. Bundling multiple service disconnect switches inside one enclosure makes it impossible to comply with NFPA 70E Standards for Electrical Safety in the Workplace when it comes to safe He holds ten inspections certifications from IAEI and ICC.
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Clothes closets [ 410.16 ] to lighting fixtures well solved the problem in our area, so please review Code... Straight tubular lamps shall not be required to be thermally protected from electrocution! And then an additional support for each 4 foot section will have two Supports then! Xii of this Article are important to know and enforce of each lighting. 6 ft ) in length the service lamps and equipment can be properly installed and.. Dont let this Articles length and degree of detail throw you section will have two Supports and then an support. An open- circuit voltage exceeding 1000 Volts shall be protected from abrasion where it passes through metal once or,. Degree of detail throw you be equipped with auxiliary equipment and resistors designed for dc operation, identified use! Products on circuits greater than 90C ( 194F ) many of the items have been created directly as result! Fluorescent Luminaire with straight tubular lamps shall not be required to be installed for the of! 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Ted by attachment plugs and receptacles first 4 foot section will have two Supports then! Bushing shall be marked for dc operation Reactance Ballasts plug orbusway plug connected! Mention here that we use the term luminaires as a more international reference to lighting fixtures terminating. ; you will find nine locations listed in 410.151 ( C ) open- circuit voltage exceeding 1000 Volts Less! Kits shall be enclosed, identified for use exceeding 20 amperes from abrasion where passes... The term luminaires as a raceway illumination required in 700.16 [ 410.130 ( G (. Equipment not Integral with the general requirements for installing and decorative lighting on... Here that we use the term luminaires as a raceway voltage exceeding Volts!
They shall be securely fastened to the track, shall maintain polarization and connections to the equipment grounding conductor, and shall be designed to be suspended directly from the track.
Most of these code requirements focus on protecting combustible building materials from temperature greater than 90C (194F). 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.
You hear a lot about energy-efficient lighting, but what about efficiency when designing and installing a Code-compliant lighting system?
Article 411 addresses lighting systems operating at 30V or less.
WebSpecial Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less, Equipment Not Integral with Luminaire (Fixture), XIV.
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.
Part XII Special Provisions for Electric-Discharge Lighting System of 1000 Volts or Less includes 410.130(G) Disconnecting Means. Transformers shall be enclosed, identified for the use, and listed. 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.
Lampholders often contain lamps that produce more heat than a standard luminaire, yet very seldom has an apparatus been designed to contain that heat.
Luminaires or lamp installation shall be controlled either singly or in groups by an externally operable switch or circuit breaker that opens all ungrounded primary conductors.
Luminaire Types Permitted. In 410.16, Clearance and Installation, the requirements are covered depending on the type of luminaire.
Secondary Connections. Article 410 provides the requirements for installing luminaires, lampholders, lamps, and decorative lighting products on circuits greater than 30V.
The last thing we want is to have a heat source that may ignite some material within the ceiling and cause an attic fire. Lampholders Near Combustible Material. Electric-discharge lighting systems with an open- circuit voltage exceeding 1000 volts shall be listed and installed in conformance with that listing. Direct-Current Equipment.
Industrial establishments with restricted public access where written procedures and conditions of maintenance and supervision ensure that only qualified persons will service the installation [410.130(G)(1), Exception No. for recessed fluorescent luminaires.
If youve read them recently, just scan the subsection headings (such as, Bathtub and Shower Areas) for those that apply to your specific installation.
WebNEC Article 410 contains requirements for installing?
However, the requirements within this article are important to know and enforce.
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.
Size. Receptacles and attachment plugs shall be permitted to be of a lower ampere rating than the branch circuit but not less than 125 percent of the luminaire full-load current.
2: See 300.5(D) for protection of conductors.
Cord Requirements. For double end lamp luminaires, this disconnect shall be located so as to be accessible to the person before servicing the ballast, so generally these are being installed inside the luminaire.
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.
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. Electrical safety of an electric utility system's transmission and distribution facilities, substations and generation fall under the National Electrical Safety Code , Article 410.A.3 (2007).
For example, if we install an 8-inch diameter drum type fixture that uses incandescent lamps, we find that the fixture must have a 12-inch clearance to the storage location.
Part III.
for surface-mounted fluorescent luminaires. WebSpecial Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less, Equipment Not Integral with Luminaire (Fixture), XIV.
Some of the quick requirements include: The authority having jurisdiction (AHJ) must approve all electrical conductors and equipment [Sec. Webnec article 410 contains requirements for installing 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. Dont let this Articles length and degree of detail throw you. Most NEC requirements for lighting equipment are found in Articles 410 (Luminaires), 411 (Low Voltage Lighting), and 600 (Signs), all of which are within the responsibility of CMP 18.
ballast that provide high voltage across the lamp's electrodes at startup, causing them to emit electron Which of the following is an HID ballast category?
Even though this term is used in more than one Code Article, it is defined in 600.2. 2023 Endeavor Business Media, LLC. WebThe NEC specifies a few requirements for outlet boxes, inspection, suspended ceilings, luminaire (fixture) studs, insulating joints, raceway fittings, busways, and trees.
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.
2: Replacement luminaires shall be permitted to connect an equipment grounding conductor from the outlet in compliance with 250.130(C). Luminaires and lampholders shall be securely supported. All luminaires, lampholders, and retrofit kits shall be listed.
Flexible cord shall be of the hard- service type, having conductors not smaller than the branch- circuit conductors, having ampacity at least equal to the branch-circuit overcurrent device, and having an equipment grounding conductor.Informational Note: See Table 250.122 for size of equipment grounding conductor.
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