EN 50425:2008

Foreword
1 Scope
2 Normative references
3 Definitions
4 General requirements
5 General notes on tests
6 Ratings
7 Classification
8 Marking
9 Checking of dimensions
10 Protection against electric shock
11 Provision for earthing
12 Terminals
13 Constructional requirements
14 Mechanism
15 Resistance to ageing, protection provided by enclosures of
   switches and resistance to humidity
16 Insulation resistance and electric strength
17 Temperature rise
18 Making and breaking capacity
19 Normal operation
20 Mechanical strength
21 Resistance to heat
22 Screws, current-carrying parts and connections
23 Creepage distances, clearances and distances through sealing
   compound
24 Resistance of insulating material to abnormal heat, to fire
   and to tracking
25 Resistance to rusting
26 EMC requirements
Annex ZA (normative) Normative references to international
                     publications with their corresponding European
                     publications
Annex ZB (normative) Special national conditions
Annex ZC (informative) A-deviations

This clause of Part 1 applies with the following modifications: Replacement of the first paragraph: This collateral standard applies to fireman's switches used for the breaking of the low voltage circuits for exterior and interior signs and luminaires e.g. neon signs for a.c. only with a rated voltage not exceeding 440 V and a rated current not exceeding 125 A. NOTE 1 The working voltage for the signs and luminous-discharge-tube installations is higher than 1 kV but lower than 10 kV and these should be in accordance with EN 50107 series. Renumbering of the subsequent notes. Replacement of the 6th paragraph and the new Note 6 by: Fireman’s switches complying with this standard are suitable for use between –20 °C and +70 °C. NOTE 6 Fireman’s switches are designed for overvoltage category III and used in environment of pollution degree 2 according to EN 60664-1.