Running Cables Under a Floor
Posted On January 19th, 2012 by boiler in DIY Tips, Home ImprovementsHorizontal cable runs are generally laid in the space underneath suspended wooden floors to keep them out of sight and harm’s way. When a cable is run parallel with floor joists, it needs to be clipped to the sides of the joists or just left alone to lie on the surface of the ceiling below, in cases where access to the joists is impossible.
Where cable is to be run at right angles to the line of the joists, the method is to lift up one board and then to drill holes through the joists, allowing the cable to be easily threaded through them. This is better than cutting notches into the joists, because in addition to weakening them the cable would lie too close to the surface and might get punctured by a floorboard nail.
The board lying immediately above the cable run should be labelled in some way so that any future accidents can be avoided. This will also be helpful when the cable run needs to be accessed at a later date.