This part of ISO 17874 specifies the main features of electrical master-slave manipulators intended to be used for nuclear applications. It outlines basic principles which relate to the design features of electrical master-slave manipulators for applications both inside and outside nuclear plant buildings. This part of ISO 17874 does not address prototypes, experimental devices and obsolete types, involving variations in design which omit one or more essential features of electrical master-slave manipulators (e.g. force reflection). Examples of such devices and special features are given in Annex A.