scope:

The requirements of this standard cover holders and connectors for electric lamps, including incandescent, fluorescent, and other electric-discharge-type lamps, rated as indicated in Clause 6, to be used in accordance with iCSA C22.1, Canadian Electrical Code (CE Code), Part I, iand the National Electrical Code (NEC), ANSI/NFPA 70.

These requirements cover screw lampholders, including those intended to be mounted directly on an outlet-box, lampholders for special uses, lampholders for electric signs, and adapters that convert one lampholder size to another.

These requirements also cover holders for automatic starters used with fluorescent lamps.

These requirements also cover GU24 and GU24-1 holders for fluorescent and LED self-ballasted lamps and fluorescent lamp adapters with mating pin bases.

These requirements also cover indicator lamps.

These requirements also cover lampholder inserts.

These requirements also cover naval-use lampholders. See Supplement SB.

These requirements do not cover fluorescent self-ballasted lamps and fluorescent lamp adapters covered in UL 1993.

These requirements do not cover seasonal-lighting lampholders, which are covered in UL 588, and CSA C22.2 No. 37.

These requirements do not cover electrode receptacles for use in gas-tube signs, which are covered in UL 879 and CSA C22.2 No. 34.

These requirements do not cover devices requiring a cross-bar, mounting strap, or other mounting means; such devices are considered to be luminaires.

These requirements do not cover nightlights, which are covered in UL 1786 and CSA C22.2 No. 256.

These requirements do not cover ceiling outlet-box lampholders that incorporate one or more of the following features:

a) more than one lampholder;

b) provisions for conduit connection such as openings or knockout;

c) an integral ballast, transformer or power supply; or

d) a lamp shade or lamp guard that completely encloses the lamp.

Such devices are covered by UL 1598 and CSA C22.2 No. 250.0.

In Canada, general requirements applicable to these products are provided in iCSAi C22.2 No. 0.

Lampholder, metal cap and shell - a lampholder type consisting of a metal cap and shell, an interior, and an insulating lining.

Lampholder, open-rated - a screw lampholder with an EX26 medium base or EX39 mogul base and intended for use with a "Type O" metal halide lamp. These lampholders have a physical means that only allows the use of a lamp that is "Type O" and excludes lamps with an E26 or E39 base.

Lampholder, pendant-type (cord-grip lampholder) - a lampholder intended to be supported and suspended by a flexible cord.

Lampholder, pulse-rated - a lampholder or lamp connector intended for use with a lamp that requires a starting pulse in excess of 600 Vpk.

Lampholder, refrigeration - a lampholder intended to be installed in a refrigerated compartment of refrigerators or freezers.

Note: The interior of a refrigerated compartment is considered an indoor damp location.

Lampholder, screw - a lampholder employing a threaded screwshell.

Note: Standardized screw types include the following bases:

a) E10 (miniature);

b) E11 (mini can);

c) E12 (candelabra);

d) E17 (intermediate);

e) E26 (medium);

f) E29 (admedium) (not standardized);

g) E39 (mogul).

Lampholder, screw-ring - an externally threaded lampholder intended for mounting in a panel opening by means of a threaded ring.

Lampholder, seasonal-lighting - a lampholder that is restricted for use with Christmas-tree and decorative lighting outfits and which by its construction and application is not suitable for general use.

Lampholder, skeleton-type - a screw lampholder that does not use conductive screwshell threads to make electrical contact with the lamp screw base. Electrical contact with the lamp screw base is made with one or more separate contacts in the side wall of the lamp cavity or a ring contact in the bottom of the lamp cavity.

Lampholder, temporary use - a lampholder intended for installation and use in accordance with Article 527 of the National Electrical Code, ANSI/NFPA 70, and Section 76 of the Canadian Electrical Code, Part I, CSA C22.1.

Lampholder, weatherproof - a lampholder intended for direct exposure to the weather.

Lamplock - a feature intended to keep a lamp from being removed except by a person having a key or special tool.

Vulcanized fiber - a material normally used as electrical insulation, made by combining layers of chemically jelled paper.

Note: "Fish paper" is a designation commonly used in the trade to refer to thin sheets of electrical grade vulcanized fiber.

Wet location - a location in which uncontrolled liquids may drip, splash, or flow on or against electrical equipment.