IEC 61241-1-1:1999

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Construction
5 Enclosure materials
6 Fasteners
7 Interlocking devices
8 Bushings
9 Materials used for cementing
10 Connection facilities and terminal compartments
11 Connection facilities for earthing or bonding conductors
12 Cable and conduit entries
13 Supplementary requirements for electrical apparatus for
    practice B for use in zone 20 or 21
14 Rotating electrical machines
15 Switchgear
16 Fuses
17 Plugs and sockets
18 Luminaries
19 Caplights, caplamps and handlamps
20 Verification and tests
20.1 General
20.2 Verification of documents
20.3 Compliance of prototype or sample with documents
20.4 Type tests
20.4.1 General
20.4.2 Mechanical tests
20.4.3 Tests for dust exclusion by enclosures
20.4.4 Torque test for bushings in enclosures for use in
         zone 20 or 21
20.4.5 Thermal tests
20.4.6 Thermal shock test
20.4.7 Tests if non-metallic enclosures or of non-metallic
         parts of enclosures for use in zone 20 or 21
21 Routine verifications and tests
22 Manufacturer's responsibility
23 Verifications and tests on modified or repaired electrical
    apparatus
24 Clamping tests on non-armoured and braided cables
25 Clamping tests of armoured cables
26 Marking
27 Examples of marking

Is applicable to electrical apparatus protected by enclosures and surface temperature limitation for use in areas where combustible dust may be present in quantities which could lead to a fire or explosion hazard. It specifies requirements for design, construction and testing of electrical apparatus. Note - IEC 61241-2 gives guidance on the selection, installation and maintenance of the apparatus. Apparatus within the scope of this standard may also be subject to additional requirements in other standards - for example, IEC 60079-0.