Our C14 - C15 power cables are designed to allow you to connect equipment that has a C16 socket (C15 on cable), such as servers and rack-mount switches to UPS or PDUs with C13 outputs (C14 on cable). The C15 connector, although similar in appearance to the C13 has a higher temperature rating of 170 degrees rather than 70 degrees. You can tell the difference between a C13 and a C15 connector by the notch in the connector; this means a C15 plug will work with a C14 and a C16 socket. A C13 plug however will only work in a C14 socket.