Electrical construction specifications
First, the foreman requires:
The electrician engineer should pay attention to the construction procedures to keep in mind.
Based on the design drawings, carefully look at the questions.
Cross-construction changes, and the standard standards must be memorized.
Before the construction, the material plan should be submitted early.
Civilized construction ranked first, and safety production ranked first.
Technical measures must be effective, and quality assurance has a system.
The model approach should be promoted and the quality implemented TQC.
Advanced technology should be adopted, and new processes must be used for operation.
Material equipment is checked first, and the record form is filled in in detail.
The product must have a certificate of conformity and the inspection certificate must be prepared.
Second, construction preparation:
There are many items to prepare for the project. The following is a list of details.
Power lighting distribution box, high voltage voltage distribution cabinet.
Wire and cable hard busbars, large fixtures and lightning protection.
Circuit breakers and transformers, all kinds of mutual inductance and motor.
Operating mechanism and instrumentation, emergency power supply capacitors.
Transformer oil is forgotten, the battery uses sulfuric acid.
Pipe and wire should be inspected, and cement poles are also included.
The accessory materials are to be qualified, and all kinds of accessories should be available.
Install the holes early, and the position elevation should be accurate.
The wall of the beam and the top of the wall and the decorative surface are flush with the box.
The convex and concave phenomenon should be overcome, and the concave two centimeters should be repaired.
The surrounding sealing should be strict and the appearance of the drum should not be beautiful.
Third, the electric pipe laying:
The buried pipeline shall be protected and the pipe shall be buried in the center of the wall.
The buried pipe of the structure shall be rust-removed, and the anti-corrosive paint shall be painted inside the earth wall
Line pipe steel bars should be tied, and the main bars and pipes should not be welded.
The small tube should be connected with a threaded joint, and the butt welding can also be used.
More than seventy pipes are allowed to be used for casing welding.
The nozzle is aligned with the center of the sleeve, and the length of the sleeve is standard.
2.2 times the outer diameter of the tube, thin tube sleeve welding is never allowed.
The pipe clamps are connected across the ground wire and each end must be welded on both sides.
According to the diameter of the ground wire, the flat steel should be welded on three sides.
The flat steel is twice as long and the tube is welded 6d long.
The main rib is used as a lightning protection line, and the lower part is to be welded.
The grounding resistance is first recorded, and the hidden inspection is complete.
TN-S to supply power, protect the ground box box.
The wall thickness is less than 2 mm and no grounding pressure contact is made.
The wire tube enters and exits the box and uses a threaded lock to lock the bus bar.
The wire tube is darkly placed into the box, and it is better to do spot welding around.
Spot welding is only done in three or five places, and the anti-corrosion paint is welded twice.
The communication is below 50 volts and the DC is the limit.
It is a safety voltage block, and the piping is not used as a jumper.
Fire button junction box, behind the dark box wall.
The pre-buried work is over and the ground connection is complete.
After the completion of the process, it will be concealed and checked in time for inspection.
The hidden content is divided into five points, and the project site is well written.
The strip is connected to the grounding pole, and the wire tube is buried in the structure.
Can not enter the ceiling, concealed to be laid.
The main ribs are connected to make lightning protection, and the hidden front resistance is first recorded.
Straight buried cables are not leaked, and the specifications are filled together.
The contents of the record are written in detail and cannot be handled.
The three parties accept the signature and save the information into the file.
It is difficult to find a design institute when the project changes.
Fourth, offline installation:
The project works with more than half, and the installation and threading are conditional.
The structural engineering has been verified and the brick and concrete renovation is completed.
The finished product protection is guaranteed, and the tube is dry and insulated.
In order to safety and construction, the color of the wire should be clearly distinguished.
The color of the trunk line can be divided, and the branch of the box should be obvious.
The zero line should be light blue and the phase line divided into yellow, green and red.
Green and yellow are PE, so you can't use them randomly.
Darkly match all parts of the pipeline, and strictly connect them tightly.
The wire should not be exposed and the cover of the box should be closed.
The rat fire is not awkward and the safe power supply is guaranteed.
Wire connections are specified, and fusion welding is never possible.
Pressing cap screw button, single strand aluminum wire should be used.
The cross section of the wire must be consistent, and the copper-aluminum connection should be transitioned.
The wiring inside the box is bundled and the connection inside the box remains.
Clean and tidy, no pollution, and the mouthpiece is labeled.
The box door should be grounded and the PEN line should be obvious.
The single-phase socket is safe, and the left zero is right on the ground.
The triangle below the triangle is formed, and the ground hole is on the upper side.
The lamp switch is installed, and the horizontal and vertical are beautiful.
The surface mounting is done in order, and each process is pre-checked.
V. Inspection and acceptance:
The matching pipeline should be pre-examined, and the compilation includes 7 aspects.
Variety specifications and elevation, fixed position and appearance.
The anti-corrosion treatment is lost, including the inner tube of the ceiling.
Pre-inspection is done along with the process, and there are aspects to check.
Variant power cords, luminaire switches and cables.
Strong and weak sockets should be available, trunking trays and trays.
The direction of the power outlet is correct, and the position of the equipment cannot be biased.
The installation dimensions are the same, and the inspectors will be named.
Each process should be summarized, and the team should conduct self-inspection and mutual inspection.
The quality assessment should be synchronized and the content requirements should be filled out.
Guarantee projects must be guaranteed, basic projects should be sampled.
The measured items should be measured, and the percentages are marked.
Timely summarization for evaluation, unity and quality.
After the wire is worn out, the insulation is carefully recorded.
Equipment power and lighting, the main branch line must be complete.
System lightning protection and protection, working grounding anti-static.
4 kinds of grounding must be done, draw a good indication to do the hidden inspection.
After the installation work is done, run the test.
Self-controlled motor with heating, signal sound and antenna.
Fire TV and telephone, monitor storage and power generation.
After a single machine is completed, the test record must be complete.
The high-rise building is forgotten, and the full load is to be tested.
There are limits to the trial operation time, see regulations and specifications.
After the installation of the trial operation, the quality assessment is final.
At the end, you need to do the as-built drawings, and change the negotiation to see the details.
Careful planning and checking, the quality of the project is not difficult.
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