The plug of an electric cooker can get hot while it's being used due to several reasons, primarily related to electrical resistance and current flow.
Electrical Resistance: The electrical plug and its prongs are made of metal, typically brass or copper, which is a good conductor of electricity. However, all materials, including metals, have some level of electrical resistance. When electric current flows through the metal prongs of the plug, some energy is converted into heat due to this resistance. The more current flowing through the plug, the higher the heat generated.
Current Flow: Electric cookers draw a significant amount of electrical current when they are in use, especially when heating elements are operating at high power settings. As the current flows through the plug, it encounters the resistance mentioned earlier, which leads to the generation of heat.
Loose Connections: A common reason for a plug to get excessively hot is a loose connection between the plug and the wall socket. A loose connection increases the electrical resistance, causing more heat to be generated at the point of contact.
Overloading: If the electric cooker is drawing more current than the electrical circuit can handle, it may lead to overheating of the plug and the circuit. Overloading can happen when multiple high-power appliances are connected to the same circuit simultaneously.
Faulty Plug or Wiring: In some cases, the plug itself may be faulty, with damaged internal wiring or a loose connection inside the plug casing. These issues can lead to increased electrical resistance and heat generation.
It's essential to monitor the temperature of the plug while using an electric cooker. While it's normal for a plug to get slightly warm during operation, it should not become excessively hot. If the plug is too hot to touch, or if you notice any signs of damage or discoloration, it's crucial to stop using the cooker immediately and have it inspected by a qualified electrician. Avoid using extension cords or multi-socket adapters with high-power appliances like electric cookers, as they can exacerbate overheating issues. Additionally, ensure that the electrical circuit supplying power to the cooker can handle its power requirements to prevent overloading.