Heating appliance extension

IEC C14 refers to the plug on the extension lead, whilst IEC C15 refers to the socket on the other end of the cable. The C15 socket is normally intended for appliances with an IEC C16 socket.

Yes. IEC C15 and IEC C16 form the standard power appliance plug connection. The C15 connector is plugged into a corresponding C16 appliance socket.

No. The C16 socket has a mechanical coding system which prevents a standard C13 ‘cold appliance’ plug from being inserted. A C15 plug is usually used with a C16 socket.

Mechanically, this is possible. However, it is also necessary to check whether the cable used is suitable for the specific application in terms of current-carrying capacity, voltage, conductor cross-section, temperature requirements and approval.

Depending on the model, extension leads for hot appliances are available in sizes including 3 × 0.75 mm² and 3 × 1.0 mm², amongst others. The choice depends on the current draw, cable length, operating conditions and the specifications of the connected appliance.

Different cable colours make it easier to identify devices, circuits and power supply routes. Coloured cables can simplify maintenance, identification and troubleshooting, particularly in server racks, plant rooms and industrial facilities.

C13 is the standard cold-equipment connector and is typically paired with a C14 plug. C15 is designed for higher temperature requirements and features additional mechanical coding. Its standard counterpart is the IEC C16 equipment connector.