Plugging an extension lead into another extension lead, also known as daisy-chaining, is not safe and should be avoided. There are several reasons why this practice is not recommended.
Firstly, when you connect two or more extension leads together, the overall length of the electrical path increases. This means that the resistance of the extension leads also increases. Resistance is the opposition to the flow of electric current, and when it increases, it can lead to the generation of heat.
As the resistance increases, more heat is generated within the extension leads. Over time, this heat can build up and potentially cause the insulation around the wires to melt or catch fire. This is especially true if the extension leads are not designed to handle the increased load caused by daisy-chaining.
Additionally, plugging one extension lead into another can cause voltage drop issues. The longer the electrical path, the more voltage drop occurs. Voltage drop can lead to a decrease in the voltage reaching your devices, affecting their performance and potentially causing damage.
Furthermore, daisy-chaining extension leads can create a tangled mess of cords, increasing the risk of tripping hazards. This is especially dangerous in areas where there is foot traffic or where children or pets are present.
It is important to note that extension leads are designed to be used as temporary solutions and not as permanent wiring. They are typically rated for a specific load and length, and exceeding these limits can pose significant safety risks.
Instead of daisy-chaining extension leads, it is recommended to use a single, high-quality extension lead that is long enough to reach your desired location. If you need power in multiple areas, consider using power strips or surge protectors that have built-in overload protection and multiple outlets.
It is not safe to plug an extension lead into another extension lead. The increased resistance, potential for overheating, voltage drop issues, and tripping hazards make daisy-chaining extension leads a risky practice. It is always best to use a single, appropriately sized extension lead or consider alternative solutions such as power strips or surge protectors.