Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 General requirements
4 General notes on test
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 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 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 Not applicable
B Electronic circuits
C Not applicable
D Not applicable
E Measurement of creepage distances and clearances
F Motors not isolated from the supply mains and having
basic insulation not designed for the rated voltage
of the appliance
G Circuit for measuring leakage currents
H Classification of controls in accordance with the
requirements of BS 3955 : Part 3 as type 1 or type 2Tables
1 Diameter of silver wire for fuse test
2 Permissible variations in rated input
3 Permissible temperature rises
4 Temperatures increases for motor windings test
5 Insulation resistance
6 Test voltages
7 Endurance test operating time
8 Limiting temperatures of windings under abnormal
operation
9 Permissible temperature rises under abnormal
operation
10 Test force for screwed glands
11 Size of cable and conduit entries
12 Size of flexible cord
13 Test figures for flexible cord pull and torque
14 Not applicable
15 Design of terminals for fixed wiring: cross-
sectional area of conductors
16 Dimensions of pillar terminals
17 Dimensions of screw terminals
18 Dimensions of stud terminals
19 Axial pull on conductors
20 Torque values for screws and nuts
21 Creepage distances and clearances
22 Creepage distances and clearances for circuits
separated from the supply by an isolating
transformer
Figures
1 Figure deleted
2 Test pin
3 Not applicable
4 Diagram for leakage current measurement at operating
temperature for single-phase connection of class II
appliances
5 Diagram for leakage current measurement at operating
temperature for single-phase connection of
appliances other than those of class II
6 Diagram for leakage current measurement at operating
temperature for three-phase connection of class II
appliances
7 Diagram for leakage current measurement at operating
temperature for three-phase connection of
appliances other than those of class II
8 Diagram for electric strength test at operating
temperature
9 Vertical rain apparatus
10 Splash apparatus
11 Spray apparatus
12 Impact-test apparatus
13 Device for testing shoulders in conduit entries
14 Ball-pressure apparatus
15 Hot mandrel apparatus
16 Arrangement and dimensions of electrodes for
tracking test
17 Schematic representation of cord anchorages
18 Oscillating member of apparatus for flexing test
19 Simulation of defects for motors of appendix F
20 Circuit for measuring leakage currents
21 Test finger