BS 842:1965

Cooperating organizations
Foreword
1 Scope
2 Definitions
3 Service conditions
4 Rating
5 Standard arrangement of poles
6 Standard voltage ratings
7 Standard current ratings
8 Frequency
9 Marking
10 Terminal identification
11 Temperature rise
12 Earth-leakage performance
13 Test device
14 Mains operated trip coils
15 Construction
16 Operating mechanism
17 Connection arrangements
18 Test requirements - general
19 Test certificates
20 Type tests
21 Temperature rise test
22 Operation of the test device
23 Endurance test
24 Making and breaking test
25 Through current test
26 Resistance to lightning surges
27 Routine test
28 Performance test
29 Speed of operation
30 Performance of test device
31 Mains voltage test on tripping device
32 High-voltage test
Appendix A - Service conditions
Appendix B - Application of earth-leakage circuit-breakers
Appendix C - Method of installation
Appendix D - Function of the test device
Appendix E - Effect of earth-electrode resistance

Rated voltages up to 500 V, rated currents up to 200 A. Ratings, construction, performance, type and routine tests. Appendices: service conditions, application of earth-leakage circuit-breakers, installation, function of test device, effect of earth electrode resistance.

This British Standard specifies requirements for a.c. voltage-operated earth-leakage circuit-breakers having rated voltages not exceeding 500 volts and rated currents not exceeding 200 amperes (see Appendix B, Appendix C and Appendix E).