Investigators found that the air conditioner was plugged into an ungrounded, multi-socket plug that was plugged into an extension cord, the fire department said.

“These devices may seem small, but they’re power-hungry. A hair dryer can use over 1800 watts, which is a lot for a multi-socket extension lead to handle safely.

But make sure never to use them for reheating appliances. 3. Avoid plugging one extension cord into another, as this increases the risk of catching fire. 4. Keep heavy appliances like microwaves, ...

But how many people do you think are eager for premium electrical sockets, when an extension cord costs $4, and an outlet costs $2? Verdict: Genius. Almost. But not quite. Dang.