EN 60974-8:2009

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Environmental conditions
5 Tests
   5.1 Test conditions
   5.2 Measuring instruments
   5.3 Conformity of components
   5.4 Type tests
   5.5 Routine tests
        5.5.1 External gas console
        5.5.2 Internal gas console
6 Protection against electric shock
   6.1 Insulation
   6.2 Protection against electric shock in normal
        service (direct contact)
        6.2.1 Protection provided by the enclosure
        6.2.2 Capacitors
   6.3 Protection against electric shock in case of
        a fault condition (indirect contact)
7 Thermal requirements
   7.1 Heating test
   7.2 Maximum temperature
8 Connections for plasma cutting torches
9 Mechanical requirements
   9.1 Protection against fire or explosion
   9.2 Gas line purging
   9.3 Enclosure
        9.3.1 Design requirements
        9.3.2 Enclosure purging
        9.3.3 Safe design of gas console
        9.3.4 Open structure
        9.3.5 Solid filled enclosure
   9.4 External gas console
   9.5 Internal gas console
10 Gas lines
   10.1 Gas hoses and tubing
   10.2 Gas fittings
   10.3 Leak test
11 Control circuits
12 Rating plate
   12.1 External gas console
   12.2 Internal gas console
13 Instructions and markings
   13.1 Instructions
   13.2 Marking
Annex A (informative) - Mechanized plasma system diagram
Annex B (informative) - Example of a rating plate layout
Bibliography
Annex ZA (normative) - Normative references to international
                       publications with their corresponding
                       European publications

IEC 60974-8:2009 specifies safety and performance requirements for gas consoles intended to be used with combustible gases or oxygen. These gas consoles are designed to supply gases for use in arc welding, plasma cutting, gouging and allied processes in non-explosive atmospheres. The significant changes with respect to the previous edition are the following: - removal of intrinsically safe design; - introduction of gas mixing function; - new informative rating plate layout; - induced changes due to publication of IEC 60974-1, edition 3.