As the cord gets longer , the current carrying capacity of the cord gets lower. For example, a 16 gauge extension cord less than 50 feet in length can power a 1625 watt (W) appliance. A 16 gauge cord that is longer than 50 feet in length can only power an appliance up to 1250W.
Does length of extension cord matter?
Extension cord length is an incredibly important factor. The longer the extension cord is, the more resistance . Extension cords come in various lengths, from a few feet to 100 feet. Although copper wire is a very good conductor, it does have an amount of resistance that generates heat.
Is a shorter extension cord better?
Every extra foot of cord increases the electrical resistance. This decreases the power the cord can deliver to connected devices. For best results, use the shortest extension cord possible . Tip: If you’re replacing an old cord, look for the AWG number printed on the jacket to select a new cord with the same gauge.
How long is too long for an extension cord?
In general, extension cords should not exceed 100 feet in length . However, by plugging one extension cord into another, the maximum cord length can be easily exceeded. If the job requires more than a 100-foot distance, a temporary power distribution box is required.
Why is it bad to use really long extension cords?
The Length of the Cord
The longer the extension cord, the harder it is for the electrical current pass through . This means electrical current will can weaken as it passes through the cord to its destination, causing the power outlet to work harder.
Do extension cords lose power over distance?
Any resistance to current flow causes a voltage drop and all wires have resistance. Over short distances, the voltage drop is negligible and unnoticeable . ... For example, 50 feet of 14-gauge wire will cause a voltage drop of about 3 percent if the supplied voltage is 120 volts and the wire carries no more than 12 amps.
What happens if extension cord is too long?
An improperly sized extension cord can cause a tool or appliance motor to burn out if allowed to run for too long. It can also cause a dangerous situation if it overheats.
How far can you run 12 gauge extension cord?
12-Gauge Cords: If your tool load is between 10 and 15 amps and the length of the cord is 50 to 100 feet , you need a 12-gauge cord to safely power any tool. This is a great extension cord for many purposes.
What does 12 AWG mean on an extension cord?
12 gauge= heavy duty . 10 gauge=very heavy duty. The longer the extension cord, the bigger the drop in amps. It’s important to use a cord which is a heavy enough gauge for the tool or appliance.
What is the most heavy duty extension cord?
Best overall: Coleman 14 Gauge 100 Ft. Extension Cord. Best with a power strip: Anker Power Strip Extension Cord. Best heavy-duty extension cord: Watt’s Wire 14-Gauge Extension Cord .
How far can you run a 30 amp extension cord?
As long as it’s rated for 30 amps, there is no maximum distance . The question should not be how many feet, but how many cords. For example, two 50 foot, 30 Amp extension cords should be considered to have less capacity than one 100 foot extension cord.
How many extension cables is safe?
Use only One Extension Lead Per Socket – it may sound stupid, but some people plug in an extension lead into an extension lead. Use one extension lead per socket only, otherwise the risk of overloading the wall socket and the extension lead plugged into it!
Can you use an extension cord permanently?
Do not use extension cords as permanent wiring . If you find yourself using the same extension cord for more than 30 days, this may indicate a need for more permanent wiring. Do not run extension cords through holes in walls, ceilings, floors, doorways or other openings.
Is it OK to run a refrigerator on an extension cord?
Safety Considerations
The biggest concern with using an extension cord to power a refrigerator is using the wrong cord, which can lead to overheating of the cord, damage to the appliance and increased risk of fire or electric shock. Never try to plug a three-pronged appliance into an un-grounded extension cord .
What is the disadvantage of extension cord?
Extension cords can overheat and cause fires when used improperly . Overheating is usually caused by overloading or connecting appliances that consume more watts than the cord can handle. Damaged extension cords can also cause fires. Extension cords should only be used temporarily.
What is the disadvantages of using extension wires?
disadvantages : One of the major problems with extension cords is that they ‘re subject to everyday wear and tear . People rountinely trip over them, yanking the plug from the socket, and causing damage to the plug. Damage also occurs by doors closing on the cord or people walking over them, as well.
