I recommend that you get the unit and mount it before you hire an electrician. The power cord is one foot long and stiff as a board. An extension cord is not permitted. The only way the electrician will get the box mounted in the right place is to assemble the outlet box and outlet, plug the cord into the outlet, and then determine where and how to attach the outlet box to a stud. If your garage has plaster board, resist the option to mount the outlet box to the plaster board. A tremendous amount of force is required to seat the plug fully into the outlet. A 6-20P plug has much wider blades than is used on 120 volt appliances. Note that I did not use the grossly overpriced $80 installation kit. The parts in that kit are not worth more than $10. The unit is hung from a lag bolt with several screws in the bottom bracket to lock it into place so it can't be lifted off of the lag bolt.