How many extension cords can safely be put together?

When it comes to safely using extension cords, the recommended practice is generally to connect only one extension cord to another. This is to prevent overheating and the risk of fire, as each additional extension cord increases the resistance in the circuit and can lead to excessive voltage drop and overheating.

Connecting two extension cords may be done in some circumstances if both cords are rated for the required load and if the total length does not exceed the manufacturer's recommendations. However, connecting three or four cords is typically unsafe and is often advised against, as it greatly increases the risks associated with electrical resistance and potential overload.

Therefore, while option two is often cited as a limit that may be acceptable under certain conditions, always ensure that the total length and load do not exceed what is safe, and remember that using a single, appropriately rated extension cord is the preferred method to maintain safety.