IEC 62498-2:2010 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 the above-mentioned areas. Such influences include altitude, temperature and humidity, air movement, rain, snow, hail, ice, sand, solar radiation, lightning, pollution, vibration, shocks, EMC and earthquakes. The contents of the corrigendum of November 2010 have been included in this copy.