| 摘要 |
t is disclosed herein flattened rigid or flexible, smooth or spiral plastic (PVC) pipes destined to be used in wall electric installations (fig. 3A and B, 18-23) of strong or faint intensity electric currents and be placed onto walls by means of a self-adhesive tape or glue spread on their surface. Junction boxes (fig. 5, 12-13) and (fig.5, 14) are also disclosed herein having standardized freely-moving parallelogram apertures (fig.5, 15) aiming at protecting -when placed on intact walls (fig.6, 16)- the supporting building elements (walls, cement) against damage fig. 1(1); the indicative size of said junction boxes varies from 10 to 100 mm in width and from 4 to 10 mm in height. The advantages of the invention are: conservation of the static properties of the building materials in buildings, easy installation, saving in time and cost by 50%, safe operation, enhanced functionality, and ready addition or removal of extra cables or replacement thereof. |
