5 Reasons Not to Daisy-Chain Extension Cords for a Space Heater

Voltage drop increases fire risk Two 100-foot cords create 200 feet of wire, causing voltage drop. The heater draws more current to compensate, which can overheat the cords.

Combined resistance multiplies danger Even if each cord is rated for 15 amps, the added resistance and poor connections at the daisy-chain point increase heat buildup and the chance of melting insulation.

Extension cords aren’t built for continuous high wattage Space heaters are high-wattage loads. Running one on a single heavy-duty 100-foot cord is already risky; stacking two cords multiplies the danger.

Heat buildup can start a fire Daisy-chaining leads to overheating, melting insulation, and a real risk of fire. This is not a safe setup for any length of time.

Use a single, properly rated cord instead If you must power a heater far from an outlet, use one 200-foot, 12-gauge or thicker cord rated for outdoor use. Better yet, move the heater closer.