Cleat wiring

Batten wiring

P.V.C. casing and capping

Metal conduit wiring

it requires less material

fault location and rectification is easy

installation cost is less

inspection more easy

all lamps give more than normal brightness

over loading of the phase cable

saving of cable for the customer

neutral conductor gets over heated

bigger size of wire

double the size of wire

half the size of wire

next bigger size of wire

improper earthing

high earth loop impedance

insulation failure

low earth resistance