NEMA IEC 60974-2 : 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
6 Protection against electric shock
   6.1 Insulation
   6.2 Protection against electric shock in normal service
        (direct contact)
   6.3 Protection against electric shock in case of a fault
        condition (indirect contact)
   6.4 Connection to the input supply network
   6.5 Leakage current between welding circuit and
        protective earth
7 Mechanical provisions
   7.1 General
   7.2 Cooling liquid overflow
   7.3 Hose coupling devices and hose connections
8 Cooling system
   8.1 Rated maximum pressure
   8.2 Thermal requirements
   8.3 Pressure and temperature
9 Abnormal operation
   9.1 General requirements
   9.2 Stalled test
10 Cooling power
   10.1 Test procedure
11 Rating plate
   11.1 General
   11.2 Description
   11.3 Contents
   11.4 Tolerances
12 Instructions
   12.1 Supplied documents and information
13 Marking
   13.1 General markings
   13.2 Inlet and outlet
   13.3 Pressure warning
Annex A (informative) - Example diagram of built-in and
        stand-alone liquid cooling systems
Annex B (informative) - Example for a rating plate of
        stand-alone cooling system

Describes safety and construction requirements for industrial and professional liquid cooling systems used in arc welding and allied processes to cool torches.