Publishing and copyright information

The BSI copyright notice displayed in this document indicates when the document was last issued.

The following BSI references relate to the work on this standard:
Committee reference PEL/23
Draft for comment 05/30139134 DC

Publication history

First published, December 1970
Second edition, March 2006

Foreword

Publishing information

This British Standard was published by BSI and came into effect on 31 March 2006. It was prepared by Technical Committee PEL/23, Electrical accessories.

Supersession

BS 4662:2006+A1:2009 supersedes BS 4662:2006, which is withdrawn.

Information about this document

The start and finish of text introduced or altered by Amendment No. 1 is indicated in the text by tags .

Text deleted.

The products conforming to this standard also conform to the relevant requirements of BS EN 60670‑1.

The start and finish of text introduced or altered by Corrigendum No. 1 is indicated in the text by tags .

Presentational conventions

The provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”

Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element.

Contractual and legal considerations

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

1 Scope

This British Standard specifies dimensional and other requirements for boxes for flush mounting of electrical accessories in a wall, or other flat surfaced structure to ensure interoperability. The performance and safety requirements for products conforming to this standard are contained in BS EN 60670‑1.

This standard specifies requirements for boxes made from metal and for boxes made from non-metallic materials.

This standard also specifies dimensional and other requirements for mounting lugs necessary for mounting the electrical accessory in the box and the fixing holes necessary for fixing the box to the surface to which it is to be attached. This includes the position and numbers of accessory fixing lugs, requirements for M3.5 threaded fixing holes for the mounting of electrical accessories and provisions for lugs allowing angular adjustment of the accessory with threaded M3.5 holes for accessory fixing.

2 Normative references

3 Terms and definitions

4 General requirements

5 Dimensions and construction of boxes

5.1 General

5.2 Mounting lugs

5.3 Fixing holes

5.4 Cable entry

5.5 Knockouts

6

7 Provision for earthing

7.1 Metallic boxes

7.2 Non-metallic boxes

7.3 Terminal location

7.4 Terminals in architrave boxes

8 Requirements for terminals

8.1 General

8.2 Earthing terminals

9

10 Mechanical strength

10.1

10.2 Performance of screw threads of mounting lugs

10.3 Strength of mounting lugs

11

12

13

14 Type testing

14.1

14.2 Tests

14.3

15 Test methods

15.1 General

15.2

15.3

15.4 Mechanical properties

15.5

15.6

15.7

16 Marking

BS 4662:2006+A1:2009

Boxes for flush mounting of electrical accessories. Requirements, test methods and dimensions

Current

Published:

31 Mar 2006