NEMA EW 4
NEMA EW 4 2009-JAN-01 Graphc Symbols for Arc Weldng and Cuttng Apparatus
This publication provides graphic symbols for arc welding and cutting equipment, including those symbols used to identify controls, indicators, connection points, operations, functions, commands, and processes. This publication does not cover graphic symbols used to alert personnel of immediate or potential personal hazards in the use of the equipment.