IEC 62087-1:2015(E) specifies the general requirements for the determination of power consumption of audio, video, and related equipment. Requirements for specific types of equipment are specified in additional parts of this series of standards and may supersede the requirements specified in this standard. Moreover, this part of IEC 62087 defines the different modes of operation which are relevant for determining power consumption. This first edition of IEC 62087-1 together with IEC 62087-2 to IEC 62087-6 cancels and replaces IEC 62087:2011 in its entirety. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to Clauses 1 to 5 of IEC 62087:2011. It includes new information about operation modes. Equipment that includes removable main batteries are now considered. Light measuring equipment is now specified.