BS 6991:1990

Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 General requirements
4 General conditions for type testing
5 Ratings
6 Classification
7 Marking
8 Instructions for use
9 Dimensions and compatibility
10 Creepage distances, clearances and distances through
    insulation
11 Accessibility of live parts
12 Construction
13 Terminals and terminations
14 Screws, current-carrying parts and connections
15 Provision for flexible cords
16 Resistance to ageing
17 Resistance to moisture and humidity
18 Insulation resistance and electric strength
19 Electrical breaking capacity
20 Normal operation
21 Temperature rise
22 Mechanical strength
23 Resistance to heat
24 Resistance of insulating material to abnormal heat
    and fire
25 Resistance to tracking
26 Resistance to excessive residual stresses and to
    rusting
Appendix
A Test schedule
Tables
1 Minimum creepage distances and clearances
2 Test torque levels
3 Forces exerted by components
4 Test schedule
Figures
1 Connector
2 Equipment inlet
3 GO gauge for connector
4 Primary and supplementary GO gauges for equipment
    inlets
5 Apparatus for testing inadvertent disconnection of
    accessories
6 Withdrawal pull gauge
7 Apparatus for testing the cord anchorage
8 Apparatus for the flexing test
9 Apparatus for breaking capacity and normal operation
    tests
10 Circuit diagram for breaking capacity and normal
    operation tests
11 Tumbling barrel
12 Impact test apparatus (test hammer)
13 Ball pressure test apparatus
14 Apparatus for pressure test on connectors

Requirements for couplers with particular reference to safety and interchangeability. Suitable for connection to Class II portable appliances, indoor and outdoor use at voltages not exceeding 250 V at 50 Hz. Weather-resistant to IPX4.

This British Standard specifies requirements for 6/10 A two-pole, polarized couplers for household, commercial and light industrial equipment with particular reference to safety and interchangeability in normal use. This standard applies to couplers which are suitable for the connection of the supply voltage to Class II portable appliances and are intended for indoor and outdoor use operating at voltages not exceeding 250 V. They are capable of safe operation in conditions of splashing water as defined by IPX4 in BS 5490 and are intended for use with circular type insulated and sheathed flexible cords and cables complying with Tables 6, 9 and 16 of BS 6500:1984, having conductor cross-sectional areas of 0.5 mm², 0.75 mm² or 1.0 mm². Couplers are suitable for use at an ambient temperature of − 5 °C to 40 °C, the average value over a 24 h period not exceeding 35 °C.

Requirements are specified for rewirable and non-rewirable connectors and also for rewirable and non-rewirable inlets.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.