30) Which is the permissible voltage drop at the point of consumer on high and extra high voltage as per IE rule?

31) Which is the height of distribution boards to be fixed from floor level as per IE rule?

32) Which type of distribution is used in workshop wiring?

33) Which is the thickness of metal conduit pipe for conduit size up to 32 mm as per IE Rule?

34) Which helps both wireman and consumer to select the material according to commercial practice, cost and requirement?