1, according to the specification requirements, wire diameter equal to or less than 16mm2 when the ground wire diameter must be equal to the fire, zero line, that is to say, the three wires must be the same.
2, house installation of water and electricity, three lines (fire, zero, ground) must be led to the indoor distribution box, the yellow and green line is the ground.
3, in addition to lighting (some drawings lighting is also three wires), all other outlets, including the weak box power is three wires.
4, water and electricity acceptance when the supervisor will certainly check the circuit, for the check of the ground with a socket inspector will know, not connected to the ground is not acceptable.
5, the grounding line can only be connected in parallel does not allow series connection, which is to ensure that at all times to have grounded to ensure the safety of electricity.
Extended information
Grounding wire role
1, to protect personal safety
Because of electrostatic discharge is prone to generate a large number of charges, if the electrical equipment does not get the proper isolation, it will be very easy to electrical appliances and human body caused great harm, and the role of the ground wire just happens to be the role of high-voltage equipment and the conductor between the earth. The role of the grounding wire happens to be a high-voltage equipment and the conductor between the earth, to avoid the purpose of us being damaged by the electric charge.
2, lightning
Placed in the past, once the occurrence of thunder and rain, poles and other equipment are often damaged because of lightning strikes, sometimes even days can not be used, so the role of the grounding wire in the role of lightning can be a very good protection, and effectively extend the service life of the electrical equipment.
3, to ensure normal operation
For some must have electricity to work, such as medical work, the role of the grounding wire is to avoid power outages encountered when the unexpected situation, not to be affected, still be able to operate normally a small load reference potential.