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NEMA IEC 60974-2:2009

NEMA IEC 60974-2:2009 American National Standard For Arc Welding Equipment - Part 2: Liquid Cooling Systems Describes safety and construction requirements for industrial and professional liquid cooling systems used in arc welding and allied processes to cool torches.

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Table of Contents

FOREWORD
1Scope
2Normativereferences
3Termsanddefinitions
4Environmentalconditions
5Tests
5.1Testconditions
5.2Measuringinstruments
5.3Conformityofcomponents
5.4Typetests
5.5Routinetests
6Protectionagainstelectricshock
6.1Insulation
6.2Protectionagainstelectricshockinnormalservice
(directcontact)
6.3Protectionagainstelectricshockincaseofafault
condition(indirectcontact)
6.4Connectiontotheinputsupplynetwork
6.5Leakagecurrentbetweenweldingcircuitand
protectiveearth
7Mechanicalprovisions
7.1General
7.2Coolingliquidoverflow
7.3Hosecouplingdevicesandhoseconnections
8Coolingsystem
8.1Ratedmaximumpressure
8.2Thermalrequirements
8.3Pressureandtemperature
9Abnormaloperation
9.1Generalrequirements
9.2Stalledtest
10Coolingpower
10.1Testprocedure
11Ratingplate
11.1General
11.2Description
11.3Contents
11.4Tolerances
12Instructions
12.1Supplieddocumentsandinformation
13Marking
13.1Generalmarkings
13.2Inletandoutlet
13.3Pressurewarning
AnnexA(informative)-Examplediagramofbuilt-inand
stand-aloneliquidcoolingsystems
AnnexB(informative)-Exampleforaratingplateof
stand-alonecoolingsystem

Abstract

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

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