• Before staring drop work, lay G.I. wire of 16 gauge in every conduit in the slab upto the concealed box. Keep an extra length of 15 cm.

  • At the time of wiring, this helps in pulling the wires.

  • Drop work should commence after the completion of masonry work and satisfactory curing period.

  • Study the drawings in detail and mark the position of switch boxes with respect to the height from F.F.I.

  • Do the line out on the wall by colour marking.

  • Start chasing of the wall with a cutting machine.

  • Bends in conduit pipes should not be sharp.

  • Provide thick conduit pipes of the approved quality in the chased portion and tie with the help of binding wires and nails.

  • Conduit pipe should not project out of the wall. It should be at least 5mm inside the surface of wall.

  • Provide an inspection box on the wall, at a suitable location.

  • Fix all the boxes flush to adjacent finished wall, considering the thickness of plaster.

  • Finish the chased portion with cement mortar. Roughen the surface.

  • In case of 3 or more conduits, provide a chicken mesh over conduits portion before finishing.

  • Cover all the boxes with dummy plates to prevent damages during plastering.

  • Pass G.I. wires of 16 gauge inside the conduits with additional loop length of 15 cm.

  • The same procedure should be followed for the mains and sub-mains in case of batten/casing capping wiring.

  • After completion of all plastering work, clean the concealed boxes.