Bridget Gonzalez's likes

We are having our first home built in QLD, and I am concerned about the way the electrical wiring has been put in our home. We have electrical wires that span across the frame in some parts of the house, and none of the wiring appears to run along the frames (as I have seen in other constructions). Is this safe and within tolerances for QLD? I m concerned if I decide to put a nail in the plaster post handover that I will hit an electrical wire floating in the wall. Advice please.