Adjustable Speed Electrical Power Drive Systems – Part 5-2: Safety Requirements – Functional
standard by Underwriters Laboratories, 08/28/2012
Electric Motor-Operated Hand-Held Tools, Transportable Tools And Lawn And Garden Machinery – Safety – Part 3-6: Particular Requirements For Transportable Diamond Drills With Liquid System
standard by Underwriters Laboratories, 06/17/2016