These North American power cords are ideal for powering devices that generate lots of heat. For this purpose, these cords are rated at 120°C. On one end, these cords plug into the standard North American wall outlet or receptacle, and on the other end they connect to any equipment using either the IEC-60320 C16 or C14 inlet. The IEC Auto-Lock C15 is an internal mechanism that holds the pins of the C14 or C16 Plug or Inlet to keep your device from being accidentally unplugged! These components are sturdy yet unplug with ease whenever you want to remove the power cord!