I.S. EN 60967:1991

FOREWORD
PREFACE
1 Scope
2 Definitions
3 General requirements
4 General notes on tests
5 Rating
6 Classification
7 Marking
8 Protection against electric shock
9 Void
10 Input
11 Heating
12 Operation under overload conditions
13 Electrical insulation and leakage current at
   operating temperature
14 Radio and television interference suppression
15 Moisture resistance
16 Insulation resistance and electric strength
17 Overload protection
18 Endurance
19 Abnormal operation
20 Stability
21 Mechanical strength
22 Construction
23 Internal wiring
24 Components
25 Supply connection and external flexible cords
26 Terminals for external conductors
27 Provision for earthing
28 Screws and connections
29 Creepage distances, clearances and distances
   through insulation
30 Resistance to heat, fire and tracking
31 Resistance to rusting
32 Radiation, toxicity and similar hazards
Figures
Appendix A - Thermal controls
Appendix B - Electronic circuits
Appendix C - Specification for the lagging material
Appendix D - Apparatus for the mechanical strength test for
             blankets
Appendix E - Measurement of creepage distances and clearances
Appendix F - Void
Appendix G - Circuit for measuring leakage currents
Appendix H - Selection and sequence of the tests of clause 30
Appendix J - Burning test
Appendix K - Glow-wire test
Appendix L - Bad-connection test with heaters
Appendix M - Needle-flame test
Appendix N - Proof tracking test
Appendix P - Severity of duty conditions of insulating material
             with respect to the risk of tracking
Annex ZX (normative) Special National Conditions
Annex ZY (informative) National deviations