BS 3456-102.71:1991

Foreword
Committees responsible
Introduction: principles of safety
Specification
1 Scope
2 Definitions
3 General requirements
4 General conditions for the tests
5 Rating
6 Classification
7 Marking
8 Protection against electric shock
9 Starting of motor-operated appliances
10 Input and current
11 Heating
12 Operation under overload conditions of appliances
     with heating elements
13 Electrical insulation and leakage current at
     operating temperatures
14 Radio and television interference suppression
15 Moisture resistance
16 Insulation resistance and electrical strength
17 Overload protection
18 Endurance
19 Abnormal operation
20 Stability and mechanical hazards
21 Mechanical strength
22 Construction
23 Internal wiring
24 Components
25 Supply connection and external flexible cables and
     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
Appendices
A Electronic circuits
B Measurement of creepage distances and clearances
C Classification of controls in accordance with
     BS 3955 as type 1 or type 2
Tables
2 Permissible variations in rated input
101 Permissible temperature rises of parts and
     surroundings
102 Permissible temperature limits for windings (except
     for running overload test)
103 Permissible temperature limits for windings
     (running overload tests only)
Figure
101 Maxima and minima of temperatures used to determine
     the arithmetic average temperature