They don t want people to power them by running cheap cords across the garage or to be responsible of one does.
Garage door opener power cord too short.
Once you are done maneuvering your garage door and are ready to re engage the automatic door opener please return the garage door back to the down position.
The safest no thinking involved way i to look at the size of the cord on the appliance and go the next size up for example if the cord on the opener is 14awg use a 12awg extension cord.
Pull the emergency release cord toward the door.
Pull the end through until the handle is six feet above the floor.
Tie an overhand knot to secure it.
Be sure to secure the connection between the opener s own cord and the short extension by holding both cables together not too tight and placing a plastic tie wrap around both so they cannot disconnect.
No need for a long or heavy duty one as door openers don t draw a big current and you only need a long enough cord to reach the outlet.
According to google a 5 hp motor draws 10 amps.
Not using an extension cord is more of a strong recommendation.
While this may seem like a no brainer one of the most common causes of garage door opener failure is simply the result of the power cord working loose from the electrical outlet.
Use the shortest extension cord possible.
Chances are your garage door opener uses a 12 or 24 volt.
Step 2 will allow you to freely move the garage door open and close.
Can an extension cord be used to power an automatic garage door opener that is hung from the rafters.
Extension cords are meant for temporary use.