Outline of Investigation for Residential Pipe Heating Cable (Outline, 6/21/2006)
standard by Underwriters Laboratories, 06/21/2006

Outline of Investigation for Controls For Stationary Engine Driven Assemblies (Outline, 6/30/2015)
standard by Underwriters Laboratories, 06/30/2015

Outline of Investigation for Cables For Network-Powered Broadband Communications Systems (Outline, 7/15/2005)
standard by Underwriters Laboratories, 07/15/2005