UL - 496
UL Standard for Safety Edison-Base Lampholders
|Publication Date:||30 October 1996|
These requirements cover Edison-base lampholders to be used in
accordance with the National Electrical Code.
These requirements do not cover non-Edison-screw lampholders for special
uses - such as projection lamps, electrode receptacles, and sign lamps.
These requirements do not cover seasonal-lighting lampholders which are
covered by the Standard for Christmas-Tree and Decorative-Lighting Outfits, UL 588. 1.3 revised August 5, 1998
To differentiate between similar devices, an Edison-base lampholder to be mounted directly on an outlet box is considered to be a surface-type lampholder, whereas such a device requiring a cross-bar, mounting strap, or other mounting means is considered to be a fixture and is not covered by these requirements.
These requirements and the Standard for Attachment Plugs and Receptacles, UL 498, cover current taps having a lamp screw shell or screw base.
A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.
1.6 revised April 11, 2000