Originally Posted by bluesman2333
If by armored cable you mean AC cable or MC cable, that is not listed to be portable cordage, hence illegal. Extension cords by nature are unsafe, cords running items drawing large currents are just plain dangerous and a fire hazard.
This is what my set-up looks like. The first pic is the new outlet in the garage (to the left of the 120v outlets). This line runs through the ceiling into the laundry room and terminates at a junction box located behind the dryer. The second pic shows this junction box with a dryer cord spliced in and running out the bottom with the plug end laying on top of the box. In this picture there is a cord already plugged into the existing dryer receptical (on the left).........this is for the dryer. When I want the 240v outlet in the garage I unplug the dryer and plug in the the cord going to the junction box. All is 10 gage wire protected with a 30A breaker.