NEMA EW 4-2009

1 Scope
2 References
  2.1 Normative references
  2.2 Informative references
3 Terms and definitions
4 Identification of parts and application
  4.1 General
  4.2 Procedure for parts
  4.3 Selection of symbols
  4.4 Size of symbols
  4.5 Use of color
5 Graphic symbols
6 How to combine graphic symbols
  6.1 General
  6.2 Procedure to combine symbols
  6.3 Summary
Annex A (informative) - Examples of Grouping of Symbols
 A.1 Input voltage/power switch
 A.2 Use of remote receptacles and selector switches
 A.3 Weld start and stop push buttons
 A.4 Panel indicator lights
 A.5 Output (contactor) switch
 A.6 Arc force control potentiometer
 A.7 Terminals and selector switch on AC/DC welder
 A.8 Process switch (SMAW-GTAW-GMAW)
 A.9 Ignition switch on engine driven welder
 A.10 Idle switch
 A.11 Start/run switch
 A.12 Process selection for GMAW
 A.13 Control potentiometers for GMAW
 A.14 Switched settings for GMAW
 A.15 Setting pulsing parameters using digital display
 A.16 Setting pulsed GMAW parameters with digital display
 A.17 AC balance control with balanced position used for
      the SMAW process

Specifies graphic symbols for arc welding and cutting equipment, including those symbols used to identify controls, indicators, connection points, operations, functions, commands, and processes.