2, read the drawings of various symbols, letters, legend represents what, the installation of the elevation.
3, look at the electrical plan, know the direction of electrical circuits, distribution boxes, equipotential boxes, switches, sockets, lamps and lanterns,
4, combined with the system diagrams to see the piping specifications of each circuit.
5. Calculate the length of conduit according to the floor plan, and calculate the number of wires, switches, sockets and lamps required according to the calculation rules.
6, according to the system diagram to determine the circuit of each required wire specifications.
7, according to the system diagram to determine the specifications of the distribution box and configuration requirements.
8, if the owner's requirements outside the scope of the drawings, changes in the drawings need to be signed by the owner.
9, if the original electrical facilities owners need to be retained without separate construction should also be signed by the owner.