BS EN 61241-0:2006

INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Construction
   4.1 General
   4.2 Void
   4.3 Opening enclosures
   4.4 Environmental conditions
   4.Z1 Mechanical strength of apparatus
5 Temperatures
   5.1 Maximum surface temperature
   5.2 Maximum surface temperature with respect to
         dust layers above 50 mm
   5.3 Ambient temperature
6 Enclosure materials
   6.1 Non-metallic enclosures and non-metallic parts of
         enclosures
   6.2 Enclosures containing light metals
7 Fasteners
   7.1 Access to live parts
   7.2 Compatible material
8 Interlocking devices
9 Bushings
   9.1 Prevention of turning
   9.2 Torque tests
10 Materials used for cementing
   10.1 Documentation
   10.2 Thermal stability
   10.3 Verification
11 Ex components
   11.1 General
   11.2 Mounting
   11.3 Internal mounting
   11.4 External mounting
12 Connection facilities and terminal compartments
   12.1 Attached cables
   12.2 Terminal access
   12.3 Creepage and clearance
13 Connection facilities for earthing or bonding conductors
   13.1 Internal connection
   13.2 External connection
   13.3 Facility not required
   13.4 Effective connection
   13.5 Effective contact
   13.6 Environmental
   13.7 Use of light metal
14 Cable and conduit entries
   14.1 Intended use
   14.2 Construction
   14.3 Integral part of the apparatus
   14.4 Prevention of twisting
   14.5 Method of attaching
   14.6 Blanking elements
   14.7 Branching point temperatures
15 Radiating equipment
   15.1 Lasers and other continuous wave source
   15.2 Ultrasonic sources
16 Supplementary requirements for specific
   electrical apparatus - Rotating electrical machines
   16.1 Ventilation openings for external fans
   16.2 Construction and mounting of the ventilating systems
   16.3 Clearances for the ventilating system
   16.4 Materials for external fans and fanhoods
17 Switchgear
   17.1 Flammable dielectric
   17.2 Interlocking
   17.3 Indication of open position
   17.4 Openings
18 Fuses
19 Plugs and sockets
   19.1 Plugs and sockets construction
   19.2 Bolted plugs and sockets
   19.3 For Zone 21 and Zone 22
   19.4 Plugs remaining energized
20 Luminaires
   20.1 Light transmitting covers
   20.2 Guards
   20.3 Mounting
   20.4 Covers
   20.5 Parts remaining energized
   20.6 Types of lamps
21 Caplights, caplamps and handlamps
   21.1 Leakage
   21.2 Separate enclosures
22 Apparatus incorporating cells and batteries
   22.1 General
   22.2 Connection of cells
   22.3 Characteristics
   22.4 Compatibility
   22.5 Limits
   22.6 Mixture of cells
   22.7 Interchangeability
   22.8 Re-charging
   22.9 Different cells
   22.10 Leakage
   22.11 Method of connection
   22.12 Orientation
   22.13 Identification of replacement
23 Verification and tests
   23.1 General
   23.2 Verification of documents
   23.3 Compliance of prototype or sample with documents
   23.4 Type tests
24 Routine verifications and tests
25 Manufacturer's responsibility
26 Verifications and tests on modified or repaired electrical
   apparatus
27 Clamping tests of cable entries for non-armoured and braided
   cables
   27.1 Cable entries with clamping by the sealing ring
   27.2 Cable entries with clamping by filling compound
   27.3 Cable entries with clamping by means of a clamping device
   27.4 Tensile test
   27.5 Mechanical strength
28 Clamping tests of cable entries for armoured cables
   28.1 Clamping tests where the armourings are clamped
         by a device within the gland
   28.2 Clamping tests where the armourings are not clamped by a
         device within the gland
29 Marking
   29.1 General
   29.2 Marking of all electrical apparatus
   29.3 Multiple protection techniques
   29.4 Order of marking
   29.5 Reduced marking
30 Examples of marking
   30.1 Apparatus type of protection "mD" for use in Zone 20
   30.2 Apparatus type of protection "iaD" for use in Zone 20
   30.3 Apparatus type of protection "pD" for use in Zone 21
   30.4 Apparatus type of protection "tD", Practice A; temperature
         tested under 500 mm dust layer, for use in Zone 21
   30.5 Apparatus type of protection "tD", Practice B for use in
         Zone 22
   30.6 Apparatus type of protection "tD", Practice A for use in
         Zone 22
Annex ZA (informative) Classification of electrical apparatus into
         categories
Annex ZB (normative) Normative references to international
         publications with their corresponding European publications
Annex ZZ (informative) Coverage of Essential Requirements of EC
         Directives
Bibliography

Defines general requirements for the design, construction, testing and marking of electrical apparatus protected by any recognized safeguard technique for use in areas where combustible dust may be present in quantities that could lead to a fire or explosion hazard.

Specifies general requirements for the design, construction, testing and marking of electrical apparatus protected by any recognized safeguard technique for use in areas where combustible dust may be present in quantities that could lead to a fire or explosion hazard. The application of electrical apparatus in atmospheres which may contain explosive gas as well as combustible dust, whether simultaneously or separately, requires additional protective measures. The contents of the corrigendum of November 2005 have been included in this copy.