IEC 60349-1:2010 is applicable to rotating electrical machines, other than electronic converter-fed alternating current motors, forming part of the equipment of electrically propelled rail and road vehicles. The vehicles may obtain power either from an external supply or from an internal source. The object of this standard is to enable the performance of a machine to be confirmed by tests and to provide a basis for assessment of its suitability for a specified duty and for comparison with other machines. The main technical changes with regard to the previous edition are as follows: - the limits valid for traction motors are now directly stated in this standard; - the methods described in the relevant ISO standards are now allowed.