Figure 8 power cable. A range of electrical appliance connecting leads, the majority of which are terminated with connectors that conform to IEC 60320. The IEC (International Electrotechnical Commission) is the international standards and conformity assessment body. The drawing illustrates the range of connector types offered within this section - The 'odd' 'C' numbers refer to a socket type connector - mains input - and the 'even' 'C' numbers refer to a plug type connector - the appliance inlet.