UL Standard for Safety for Edison-Base Lampholders
|Publication Date:||26 November 1979|
There requirements cover Edison-base lamp-holders to be employed in accordance with the National Electrical Code.
These requirements do not cover lamp-holders for special uses which are not Edison-base lampholders such as projection lamps, electrode receptacle and sign lamps. Special features of lampholders for Christmas-tree and decorative-lighting outfits are covered in the Standard for Christmas-Tree and Decorative-Lighting Outfits, UL 588.
To differentiate between somewhat similar devices, a screw-shell receptacle designed to be mounted directly on an outlet box is considered to be a surface-type lampholder, whereas 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.