The Wiremold V5703 Support Clip is a concealed mounting method for hanging Wiremold 500 and 700. Other straps are available however they are not as neat as the Support Clip.
Usually I use mushroom head toggle bolts or sheet metal screws to attach the support clips to a surface. I line up the Wiremold and make faint pencil lines on each side of the Wiremold where I want the Support Clips to be mounted. Then I center the support clip between those marks and make a pencil mark through the hole.
If there is wood there I will use an awl to get a hole started. For hollow spaces I will cut a hole with a keyhole saw and use toggle bolts like in the picture at the top of this page.
I use a rubber mallet to bang the raceway into a support clip. I found that it is better to cover the mallet with an old white piece of tee shirt when hammering Wiremold to prevent hammer marks from adhering to the surface.
With short lengths of Wiremold I am able to push the wire through if it is compact enough. I fold over one wire and electrical tape the other two behind the folded over part.
If using a fish tape, just hook the fist tape on the end. Have someone pull and another person push to keep the wires from getting caught on the steel edges.
You cannot pull wires through a Wiremold internal elbow. You pull enough wire through the one end and then push or pull it to the next box or fitting.
Installing Wiremold is a fairly simple installation with the proper fittings and tools, but it is not the only conduit available for a garage outlet. I have an entire post on other types of electrical conduits.
When properly installed, Wiremold 500 is an approved grounding conductor. However, if somehow over time the raceway came apart at a fitting or box, the ground connection would be lost. I always push in a grounding conductor wire to ensure grounding continuity.
The internal elbow cover is easily snapped on with a rubber mallet.
Once the box is secured to the back plate using the furnished extra long 6/32 screws, the outlet can be screwed to the box.
This ceiling outlet is GFCI protected from the outlet on the wall next to the two switches. It is more convenient for testing and resetting of the GFCI to have it at hand level.
My light switch wiring diagrams may be useful to you.