Some appliances have warnings or recommendations advising against plugging them into an extension cord and instead suggest connecting them directly to a power source. There are a few reasons for this:
Power Requirement: Certain appliances, such as high-power devices or those with motors, heaters, or compressors, require a significant amount of electrical power to operate properly. These appliances draw a substantial amount of current, and using an extension cord may not provide sufficient power transmission capabilities. Extension cords may have limitations on the amount of current they can handle, leading to voltage drops and potential overheating of the cord.
Safety Concerns: Using an extension cord can introduce additional safety risks, especially if the cord is not of high quality, is damaged, or is not rated for the power requirements of the appliance. The use of an inadequate or damaged extension cord can lead to electrical fires, overheating, or electrical shocks. Directly connecting the appliance to a power source eliminates these potential hazards.
Voltage Stability: Appliances that require a stable and consistent power supply may be sensitive to voltage fluctuations. Extension cords, especially long ones or those with smaller wire gauges, can introduce voltage drops and instability due to increased resistance in the wiring. Directly connecting the appliance to a power outlet reduces the chances of voltage fluctuations and ensures the appliance receives the necessary power quality.
If an appliance specifically advises against using an extension cord, it is generally recommended to follow the manufacturer's instructions for optimal performance, safety, and longevity of the appliance. However, if you need to use an extension cord, it's essential to choose one that is of appropriate length, gauge, and rating to handle the power requirements of the appliance and ensure it is in good condition without any signs of damage.