Electrical Fitting and Cable Wiring

In construction of a house/ building house owner should focus on electric works also; which need a lot of attention while laying wiring as well as quality of wiring, specification of electric appliances and cables/wires. Due to carelessness or lack of knowledge by electrician fatal accidents may occur in later and take up more money in repair. Thus every care should be taken while doing electrical fittings. Here are given some tips on how to lay wiring.

• Electrical cables/wires are laid inside walls and RCC slab which may require dismantling if any problem/defect arises in later. Dismantling is very costly as compared to getting it rightly fixed first time.

Always choose standard quality wires and cables

(This Picture is Contributed by "Ahmed")

• In case of defects in electrical wires they can cause fire in house and may even take human life in some cases. So make sure you do the following to ensure good electric works. 

1. A professional or good electrician should be hired for electric works. All electric works and installations should comply with latest Indian Electricity Acts and Rules in all respects.
2. All materials used in electrical fittings should be of approved and from a reputed manufacturer as per ISI specifications.
3. Make sure that electrician has calculated total load from various items that would be used in the house. Whether he lays wires that are capable of taking total load.  
4. It is seen that a lot of times electricians are careless while putting right load bearing wires for a purpose and these wires get burnt at the movement when entire load is put on wires.

House Wiring Rules as Per ISI Specification

• The wiring should be carried out on distribution systems with main and branch distribution boards to convenient centers and is without isolated fuses. 
• All conductors should run, as far as possible along walls and ceilings, so as to be easily accessible and capable of being thoroughly inspected.

3 phase conductor wires

(This Picture is Contributed by "Ahmed")

• In any case wiring should not run above ceiling.
• Circuit on opposite side of three wires system or on different phases of three phases’ system is kept as far apart as possible in all cases; the minimum distance should be 7 feet.
• Medium pressure wiring and all associated apparatus should comply with specification.
• The numbers of points in light circuits should not exceed 10 or the total load on circuit should not exceed 800 watts.
• One circuit can be explained as one connection from electrical meter or main fuse circuit.
• For power wiring circuit the numbers of points in a circuit should not be more than 2 and the size of wire is 1.5 mm square for copper and 2 mm square for aluminum.
• Switch boards should be fitted at a height of 1.5 meter.
• Horizontal run of wiring should be at a height of 3 meter.
• Earth wire should be 14 SWG in case of copper and 4 mm square in case of aluminum.
• Fuse wire should be connected to phase wire only.
• Connect a neutral link in neutral wire.
• Connect all switches in phase wire.
• All conductors should be of copper and have a cross section less than 0.0020 sq. inches, nominal area (3/0.029 inches) and every such conductor should be stranded.
• Minimum size of earth wire for light circuit is 1 mm square for copper and 1.5 mm square for aluminum.