I know this is an old question, but....
I found this very useful.
It includes a tone generator and a tracer, you can follow the cables.
It can show if all wires are connected properly.
It can show where a break is.
It can make the light blink on the port on a switch blink,
useful if you need to identify an outlet without unplugging everything.
It have 8 ...
You need some plastic anchors, you can see some here. You can buy mortar screws that come with plastic anchors. Simply drill a hole into the concrete with a a concrete bit and then glue the plastic anchor into the hole then drill the screw into the plastic anchor. You can get ones with a cable brackets.