This European Standard takes into account environmental conditions within Europe. This European Standard deals with the environmental influences on fixed electrical installations for traction power supply and equipment essential to operate a railway - in open air; - in covered areas; - in tunnels; - within enclosures placed in above areas. Escalators, lifts, fire protection, lighting in tunnels and on platforms, ticket machines, ventilation systems and non-essential functions are not included. Such influences include altitude, temperature and humidity, air movement, rain, snow, hail, ice, sand, solar radiation, lightning, pollution, vibration, shocks and EMC. This standard does not specify the test requirements for equipment. In case of environmental conditions not covered by the standard the data to be adopted for a specific project should be clearly stipulated when preparing a specification. This standard is not intended to apply to cranes, installations in underground mines, suspended cable cars and funicular railways. Nuclear radiation is excluded. Signalling and telecommunications systems are not considered in this standard. Fixed installed signalling and telecommunication equipment shall comply with EN 50125-3.