This power cord is used to extend the length of a standard 3 prong power cord. Heavy duty power cord is used for applications with larger power demands. This Heavy duty power cord is suitable for many applications including PC power supply on most computers and peripherals, server system and many more electronics using the US standard 3 prong power cord. IEC 320 C13 connector on one end and a IEC 320 C14 connector on the other, this cable provides a reliable power connection for your applications power need. Standards: UL, CSA, ISO 9001:2000 manufacturer