Push the clip over the cable (it should be a tight fit) and hammer the nail into the wall or other surface. Place a clip approximately every 60 cm if the cable runs on a vertical or overhead surface. On horizontal surfaces a clip every 1 to 2,5 metres will suffice. For cable thicker than 16 mm outside diameter it is better to use saddles.
New concrete requires special treatment... New concrete must cure a minimum of 28 days before either tiling or putting a dressing onto the new concrete. There are two reasons for this: 1) As the concrete cures, drying and shrinkage cracks could occur. These cracks may eventually show up in tile or dressing applied before the 28 day curing period.
you can stain before 28 days, but what's the point? the concrete has not even reached 75% of its strength and you cannot seal it. plus, for that whole period you're likely to have efflorscence rising up and discoloring the surface. so wait the 28 days. if there is no efflorescence, then go ahead and stain. don't bother testing the concrete. calcium chloride tests are useless anyway. they only test the top 1/2 of the concrete.