5) How much percentage of total cost is added to estimate as contingencies?

6) Which is the recommended power for a lighting sub circuit as per IE rule in domestic wiring?

7) What is the height of horizontal run of cables as per IE code recommendation?

8) Which is the location of distribution board in a domestic wiring installation?

9) Which is the size of G.I earth conductor to be connected in third terminal of wall sockets as per IE rule?