What does that mean; use caution with your air compressor extension cord?
Since an extension cord is a power source, damaging the cord or running over it with a lawnmower would not be a good thing. Before using any extension cord always inspect it first for loose or exposed wires and cut or worn insulation. But that is not just what this page is all about. What we want to address here is getting power to your air compressor.
The typical 120 volt air compressor comes equipped with a power cord. That cord is a certain size and length, predicated by the air compressor it is powering. In other words, the power cord to your air compressor is the right size for that compressor.
The air compressor power cord is meant to be plugged directly into a wall socket. No power bar or extension cord is recommended to be used. Why is that?
Using a too small or too long extension cord with your air compressor can result in the motor overheating and eventually the compressor motor burning out if used too long.
An undersized cord will quite often cause your compressor motor overheat switch to shut down the motor due to the heat build up. The overheat switch, or thermal cut out or thermal fuse, is there to prevent motor damage due to it overheating. If that happens, this is a signal that all is not right with the compressor motor and steps need to be taken to fix whatever the problem is.
How do you know what size extension cord to use?
You need to know the amperage draw of the compressor motor. That should be on the motor plate somewhere on the compressor motor.
Then, compare that draw to what’s available from a certain wire size and length. The following guide will help.
Outdoor use compressor extension cord?
It is recommended when working with an air compressor outdoors, and if you must use an extension cord, make sure you use an extension cord that is designed for outside use, indicated by the letters “WA” on the cord’s jacket as well as one of the correct gauge for the length required.
A better option than using an extension cord
What happens to an air tool if it doesn’t get enough air flow? Answer: It stalls. If an air tool stalls, does it damage the air tool? Answer: No!
If an electric motor stalls because it isn’t getting enough power due to a too long extension cord what happens? Answer: The motor overheats and may ultimately fail.
Use caution with your air compressor extension cord – or better yet, do not use one at all.
Instead, add air hose.
You can add 25′ or 100 ‘ of air hose to allow your air tool to be used where you want it to, and leave the compressor plugged directly into a wall outlet as close to the supply panel as possible.
To get enough flow of air to the tool you may have to up-size the hose diameter, but so what?
Once you have the additional air hose you can use it innumerable times, you can run the air line to where you need to the use the air tool rather than lugging the air compressor to the point of use, and using a longer air line versus and extension cord eliminates the risk of having the motor prematurely fail because the air compressor extension cord was not sized correctly for the intended use.