Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 General requirements
4 Requirements for type testing
5 Ratings
6 Classification
7 Markings
8 Dimensions
9 Accessibility of live parts
10 Provision for earthing
11 Terminals
12 Constructional requirements
13 Mechanism
14 Resistance to ageing, to harmful ingress of water
and to humidity
15 Insulation resistance and electric strength
16 Temperature rise
17 Making and breaking capacity
18 Normal operation
19 Mechanical strength
20 Resistance to heat
21 Screws, current-carrying parts and connections
22 Creepage distances, clearances and distances
through sealing compound
23 Resistance of insulating material to abnormal
heat, to fire and to tracking
24 Resistance to excessive residual stresses and to
rusting
Tables
1 Preferred combinations of number of poles and
ratings
2 Conductors to be accommodated by terminals with
screw clamping
3 Pull for terminal clamping test
4 Wires used for terminal clamping test
5 Torque values for test of terminal fixing
5(a) Conductors to be accommodated by screwless
terminals
5(b) Not applicable
5(c) Current for electrical and thermal stress test
X Pull and torque tests for cord anchorages
6 Connections for insulation resistance and electric
strength tests
7 Insulation resistance and test voltages
8 Test currents and conductors for temperature rise
test
9 Not applicable
10 Not applicable
11 Number of switch movements for normal operation
test
12 Torque for mechanical test on glands
13 Creepage distances, clearances and distances
through insulating sealing compound
Figures
1 Classification according to connections
2 Not applicable
2(a) Arrangement for checking damage to conductors
3 Pillar terminals
4 Screw terminals and stud terminals
5 Saddle terminals
6 Lug terminals
7 Mantle terminals
8 Typical apparatus for making and breaking capacity
and normal operation tests (not indicative of
design requirements)
9 Circuit diagrams for making and breaking capacity
and normal operation tests
10 Test circuits for fluorescent lamp loads
11 Impact test apparatus: general view
12 Constructional details of striking element
13 Construction details of mounting support for test
samples
14 Not applicable
15 Ball pressure apparatus
16 Not applicable
17 Not applicable
18 Not applicable
X Probe to check access to live parts via drain
hole