Commercial housing installation precautions
Commercial housing installation precautions:
One: Before construction, there must be electrical (strong, weak), water supply and drainage design and construction drawings.
Second, it is forbidden to lay the conductor directly in the wall, floor, under the floor or ceiling without any protection.
Third, different voltages, different loops, and different signal lines must not be put in the same threading tube.
Fourth, the installation of lamps should be done after the paint is completed. Installing lamps on brick-concrete structures, using wooden wedges, applying hooks, bolts, or expansion bolts, etc. is strictly prohibited. There should be no less than two bolts (or screws) for the fixture. Luminaires must not be installed on combustible components.
Fifth, the switch of the lamp and electrical equipment must be installed on the "phase line" (that is, control the phase line), otherwise, after the switch is off, the lamp is off and the electrical equipment is still energized, which may easily cause an electric shock.
Sixth, the power system has two protection methods: grounding protection and zero protection. At present, China generally adopts the ground protection method. Note that in the same system, it is forbidden to adopt two protection methods at the same time, otherwise it will cause a safety accident.
Seventh, it is forbidden to use a mobile switch on the bedside. If the fixture is a screw base, the center tongue of the screw base should be connected to the control phase.
Eighth, the interface of each line should be smooth and the connection between the plates should be firm. The power inlet box interface box should be protected by a protective ring (lock nut).
Ninth, in order to renew and maintain the conductors in the future, the arc of the elbow buried at the corner of the wall, underground, or ceiling (ie, the cold bend radius) should be 5 to 10 times the diameter of the conduit.
Tenth, it is forbidden to connect the wires in the threading pipe, that is, if the length of the wire is not enough to take long, the joint of the wire cannot be in the threading pipe. Generally, it should be connected in a junction box such as a switch, a socket and a lamp box.
XI. The threading tube should be of a certain size (thickness). Not only must it enable the thread to wear in, but it must also leave sufficient gaps to dissipate the heat generated when the thread passes a large current. The ratio of the cross-sectional area of ​​the general conductor to the cross-sectional area of ​​the conduit is 1/3 to 1/2. It is forbidden for the wire to block the conduit.
Twelve, the water supply pipe can be PP-R pipe, brass and so on.
13. The dark water supply pipeline must strictly inspect whether all the connection parts are tightly and firmly installed and go to the right direction. Then do the hydrostatic test and bury the water for a period of time. The pressure test index is generally between 0.8mpa and 1.0mpa.
XIV. Drainage pipe The transverse pipe shall have a certain slope. The socket shall be tightly connected to ensure no leakage. The spacing between the brackets and elevators for the fixed pipes is reasonable and firm.
15. The installation position of sanitary appliances should be accurate, and the support and bracket should be installed in a flat and firm manner. The floor drain should be installed at the lowest point of the ground and be 5mm recessed. The connection between the toilet and the floor or the nozzle is sealed with sludge or silica gel, and cement should not be used. The cement will expand and cause cracks in the bottom of the toilet.
16. Hot taps in cold and hot taps should be installed on the left side. The electric water heater should have a grounding protection device. When it is used for the first time, the air in the gall bladder should be removed. After filling the water, it can be started by electricity.
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One: Before construction, there must be electrical (strong, weak), water supply and drainage design and construction drawings.
Second, it is forbidden to lay the conductor directly in the wall, floor, under the floor or ceiling without any protection.
Third, different voltages, different loops, and different signal lines must not be put in the same threading tube.
Fourth, the installation of lamps should be done after the paint is completed. Installing lamps on brick-concrete structures, using wooden wedges, applying hooks, bolts, or expansion bolts, etc. is strictly prohibited. There should be no less than two bolts (or screws) for the fixture. Luminaires must not be installed on combustible components.
Fifth, the switch of the lamp and electrical equipment must be installed on the "phase line" (that is, control the phase line), otherwise, after the switch is off, the lamp is off and the electrical equipment is still energized, which may easily cause an electric shock.
Sixth, the power system has two protection methods: grounding protection and zero protection. At present, China generally adopts the ground protection method. Note that in the same system, it is forbidden to adopt two protection methods at the same time, otherwise it will cause a safety accident.
Seventh, it is forbidden to use a mobile switch on the bedside. If the fixture is a screw base, the center tongue of the screw base should be connected to the control phase.
Eighth, the interface of each line should be smooth and the connection between the plates should be firm. The power inlet box interface box should be protected by a protective ring (lock nut).
Ninth, in order to renew and maintain the conductors in the future, the arc of the elbow buried at the corner of the wall, underground, or ceiling (ie, the cold bend radius) should be 5 to 10 times the diameter of the conduit.
Tenth, it is forbidden to connect the wires in the threading pipe, that is, if the length of the wire is not enough to take long, the joint of the wire cannot be in the threading pipe. Generally, it should be connected in a junction box such as a switch, a socket and a lamp box.
XI. The threading tube should be of a certain size (thickness). Not only must it enable the thread to wear in, but it must also leave sufficient gaps to dissipate the heat generated when the thread passes a large current. The ratio of the cross-sectional area of ​​the general conductor to the cross-sectional area of ​​the conduit is 1/3 to 1/2. It is forbidden for the wire to block the conduit.
Twelve, the water supply pipe can be PP-R pipe, brass and so on.
13. The dark water supply pipeline must strictly inspect whether all the connection parts are tightly and firmly installed and go to the right direction. Then do the hydrostatic test and bury the water for a period of time. The pressure test index is generally between 0.8mpa and 1.0mpa.
XIV. Drainage pipe The transverse pipe shall have a certain slope. The socket shall be tightly connected to ensure no leakage. The spacing between the brackets and elevators for the fixed pipes is reasonable and firm.
15. The installation position of sanitary appliances should be accurate, and the support and bracket should be installed in a flat and firm manner. The floor drain should be installed at the lowest point of the ground and be 5mm recessed. The connection between the toilet and the floor or the nozzle is sealed with sludge or silica gel, and cement should not be used. The cement will expand and cause cracks in the bottom of the toilet.
16. Hot taps in cold and hot taps should be installed on the left side. The electric water heater should have a grounding protection device. When it is used for the first time, the air in the gall bladder should be removed. After filling the water, it can be started by electricity.
company website:
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