Article 410: Luminaires (Lighting Fixtures), Lampholders, and Lamps

Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps

I. General

410.1

Scope

410.2

Application of Other Articles

410.3

Live Parts

 

II. Luminaire (Fixture) Locations

410.4

Luminaires (Fixtures) in Specific Locations

(A) Wet and Damp Locations. The fixtures must be installed in a manner so that water will not enter or collect in the lampholder, wireway, etc.

(B) Corrosive Locations

(C) In Ducts or Hoods. This location is permitted only in nonresidential cooking areas and is subject to four specific conditions.

(D) Bathtub and Shower Areas. You cannot have any part of a suspended fixture (i.e., the cord, pendant chain, etc.) within 900 mm (3 ft.) horizontally and 2.5 m (8 ft.) vertically from the top of the bathtub rim or shower stall threshold.

(E) Luminaires (Fixtures) in Indoor Sports, Mixed-Use, and All-Purpose Facilities.

410.5

Luminaires (Fixtures) Near Combustible Material

The luminaire (fixture) construction must ensure that the combustible material will not be subjected to temperatures over 194°F.

410.6

Luminaires (Fixtures) over Combustible Material

These must be unswitched lampholders. The lampholder must be at least 2.5 m (8 ft.) above the floor unless an individual switch is installed for each fixture.

410.7

Luminaires (Fixtures) in Show Windows

External wiring is not permitted except chain-supported luminaires (fixtures).

410.8

Luminaires (Fixtures) in Clothes Closets

(A) Definition. The code has a specific set of dimensions for storage space with an explanatory diagram.

(B) Luminaire (Fixture) Types Permitted. Surface-mounted or recessed incandescent or fluorescent fixtures are permitted. The incandescent fixture must have a completely enclosed lamp.

(C) Luminaire (Fixture) Types Not Permitted. Pendant luminaires (fixtures) or lampholders and incandescent luminaires (fixtures) whose lamps are not totally enclosed.

(D) Location. Surface-mounted luminaires (fixtures) can be installed on the wall above the door or on the ceiling. The clearance between the luminaire (fixture) and nearest point of storage must be 300 mm (12 in.) for an incandescent luminaire (fixture) and 150 mm (6 in.) for a fluorescent luminaire (fixture). Recessed luminaires (fixtures) can be installed in the wall or ceiling. The clearance between the luminaire (fixture) and nearest point of storage must be 150 mm (6 in.).

410.9

Space for Cove Lighting

 

III. Provisions at Luminaire (Fixture) Outlet Boxes, Canopies, and Pans

410.10

Space for Conductors

410.11

Temperature Limit of Conductors in Outlet Boxes

410.12

Outlet Boxes to Be Covered

410.13

Covering of Combustible Material at Outlet Boxes

410.14

Connection of Electric-Discharge Luminaires (Lighting Fixtures)

 

IV. Luminaire (Fixture) Supports

410.15

Supports

(A) General. Fixtures and lampholders must be securely supported. You cannot support a fixture by the screw shell of a lampholder if it weighs more than 3 kg (6 lb.) or exceeds 400 mm (16 in.) in any dimension.

(B) Metal or Nonmetallic Poles Supporting Luminaires (Lighting Fixtures). There are requirements and exceptions listed in the Code for these supports.

410.16

Means of Support

The NEC® specifies a few requirements for outlet boxes, inspection, suspended ceilings, luminaire (fixture) studs, insulating joints, raceway fittings, busways, and trees. 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).

V. Grounding

410.17

General

410.18

Exposed Luminaire (Fixture) Parts

If the wiring system provides a means of grounding, exposed conductive parts must be grounded. If no provision for grounding is available, they must be insulated. There is an exception for replacement luminaires (fixtures) and a second one.

410.20

Equipment Grounding Conductor Attachment

A means to connect an equipment ground must be provided for a metal luminaire (fixture).

410.21

Methods of Grounding

Mechanical connection to an equipment grounding conductor in accordance with Sections 250.118 and 250.122.

VI. Luminaires (Wiring) of Fixtures

410.22

Luminaire (Fixture) WiringGeneral

410.23

Polarization of Luminaires (Fixtures)

410.24

Conductor Insulation

410.27

Pendant Conductors for Incandescent Filament Lamps

410.28

Protection of Conductors and Insulation

410.29

Cord-Connected Showcases

410.30

Cord-Connected Lampholders and Luminaires (Fixtures)

410.31

Luminaires (Fixtures) as Raceways

Normally, luminaires (fixtures) cannot be used as raceways. It is permitted, however, if the luminaire (fixture) is listed for that use.

410.32

Wiring Supplying Luminaires (Fixtures) Connected Together

410.33

Branch-Circuit Conductors and Ballasts

 

VII. Construction of Luminaires (Fixtures)

410.34

Combustible Shades and Enclosures

410.35

Luminaire (Fixture) Rating

410.36

Design and Material

410.37

Nonmetallic Luminaires (Fixtures)

410.38

Mechanical Strength

410.39

Wiring Space

410.42

Portable Lamps

410.44

Cord Bushings

410.45

Tests

410.46

Live Parts

 

VIII. Installation of Lampholders

410.47

Screw-Shell Type

410.48

Double-Pole Switched Lampholders

410.49

Lampholders in Wet or Damp Locations

 

IX. Construction of Lampholders

410.50

Insulation

410.52

Switched Lampholders

 

X. Lamps and Auxiliary Equipment

410.53

Bases, Incandescent Lamps

410.54

Electric-Discharge Lamp Auxiliary Equipment

 

XI. Special Provisions for Flush and Recessed Luminaires (Fixtures)

410.64

General

This type of luminaire (fixture) must comply with Sections 410.65 through 410-72.

410.65

Temperature

They must be installed so that any adjacent combustible material will not be subjected to a temperature higher than 90°C (194°F). If the luminaire (fixture) is recessed in fire-resistant construction in a fire-resistant building, the temperature restriction is increased to 150°C (302°F) if the luminaire (fixture) is approved for this service. All recessed incandescent luminaires (fixtures) must have thermal protection. 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.

410.66

Clearance and Installation

Recessed parts of a luminaire (fixture) that is not identified for contact with insulation must be at least 13 mm (½ in.) from combustible material and at least 75 mm (3 in.) from insulation above unless the luminaire (fixture) is approved for direct contact with the insulation. Type IC luminaires have different requirements.

410.67

Wiring

The insulation used on conductors must be suitable for the temperatures that they will be subjected to. Tap conductors can run to a box at least 300 mm (1 ft.) from the fixture. The raceway used for the tap conductor must be at least 450 mm (18 in.) long and not more than 1.8 m (6 ft.) long, be a suitable raceway or the tap conductor must be Type AC or MC cable.

XII. Construction of Flush and Recessed Luminaires (Fixtures)

410.68

Temperature

410.70

Lamp Wattage Marking

410.71

Solder Prohibited

410.72

Lampholders

 

XIII. Special Provisions for Electric-Discharge Lighting Systems of 1000 Volts or Less

410.73

General

410.74

Direct-Current Equipment

410.75

Open-Circuit Voltage Exceeding 300 Volts

410.76

Luminaire (Fixture) Mounting

410.77

Equipment Not Integral with Luminaire (Fixture)

410.78

Autotransformers

410.79

Switches

 

XIV. Special Provisions for Electric-Discharge Lighting Systems of More Than 1000 Volts

410.80

General

410.81

Control

410.82

Lamp Terminals and Lampholders

410.83

Transformer

410.84

Transformer Locations

410.85

Exposure to Damage

410.86

Marking

410.87

Switches

 

XV. Lighting Track

410.100

Definition

410.101

Installation

Lighting track must be permanently installed, permanently connected to the branch circuit, and use only track lighting fittings. The fittings cannot have general-purpose receptacles. The load and the branch-circuit rating cannot exceed the rating of the track. 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).

410.103

Heavy-Duty Lighting Track

410.104

Fastening

410.105

Construction Requirements

 

XVI. Decorative Lighting and Similar Accessories

410.110

Listing of Decorative Lighting






Pocket Guide to the National Electrical Code 2005
Pocket Guide to the National Electrical Code(R), 2005 Edition (8th Edition)
ISBN: 0131480014
EAN: 2147483647
Year: 2004
Pages: 120
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