Prevention of common electrical problems in the ho

  • Detail

Prevention of common building electrical problems

l, phenomenon (1), using thin-walled copper pipe instead of thick walled steel pipe. (2) . the embedded depth is not enough, and the position deviation is large. (3) The turning point shall be bent by electric welding, and the upper wall pipe shall be connected with the horizontal household pipe by electric welding to form a 90 ° angle. (4) . the waterproof treatment of the entrance pipe and the outer wall of the basement is not good

2. Cause analysis (1). The material purchaser is not familiar with national specifications and standards when purchasing, and some construction units deliberately confuse them to reduce costs; The construction manager is not strict or dare not object to the intentional violations of the contractor, and does not resolutely implement the specifications and standards; There are loopholes in the management of material mobilization by supervisors. (2) . insufficient coordination with civil engineering and other professional teams. (3) There is no pipe bender or can not use the pipe bender, so they are not strong minded and are greedy for the convenience of welding and bending. (4) Workers embedded in household pipes do not know waterproof technology and do not ask waterproof professionals for help

3. Preventive measures (1). Thick wall copper pipe or PVC pipe meeting the requirements must be used for the embedded pipe entering the house (general wall thickness PVC Φ L14 is more than 4.5mm, Φ 56 is 3mm). (2) Strengthen the coordination and cooperation with civil engineering and other related disciplines, define the outdoor floor elevation, and ensure that the buried depth of embedded pipes is not less than 0.7m. (3) Strengthen the education on relevant laws and regulations of the leaders of the contracting team and the material purchasers. The supervisors shall strictly implement the requirement that materials should be inspected before entering the site, and plug the loopholes (4). The elbows on the wall of the embedded steel pipes must be bent by the pipe bender, and welding and welding bending are not allowed. After bending, the steel pipe shall be free of cracks and obvious dents. The bending procedure shall not be greater than 10% of the outer diameter of the pipe, and the bending radius shall not be less than the minimum allowable bending radius of the penetrated cable. (5) . waterproof treatment shall be done well. Please ask waterproof professionals for on-site guidance or waterproof professional team to do waterproof treatment

II. Laying of electric conduits

1. Phenomenon (1). Cable conduits are overlapped in multiple layers, and there is a gluten in this temple that is higher than the reinforcement. (2) 2 or more wire tubes shall be close to each other side by side. (3) . the buried depth of wire pipe in the wall is too shallow, even buried in the powder layer outside the wall. The pipe has dead bending, painful bending and dent. (4) . when the wire pipe enters the distribution box, the pipe orifice is not filled in the box and is exposed too long; The nozzle is uneven and of different length; No protective ring is used for pipe orifice; Not locked and fixed. (5) . when embedding PVC wire pipe, instead of plugging the pipe with plug, clamp the flat bend mouth with pliers

2. Cause analysis (1). The construction personnel are not familiar with the relevant specifications, have a sloppy working attitude, covet convenience and do not follow the regulations. The management of construction administrator is not in place. (2) Inadequate coordination between architectural design and layout and electrical discipline, "DSM's advanced materials have helped us achieve excellent sales performance in the same narrow plane.

3. Preventive measures (1) strengthen the quality control of on-site construction personnel in the construction process, and carry out targeted training for workers; management personnel should be familiar with relevant specifications and strictly manage. (2) Wire PP has the advantages of low price, low density, easy processing and reuse; However, PP has many disadvantages, such as large forming shrinkage, high low temperature brittleness, easy aging and so on. The multi-layer overlap of pipes usually appears in the public friction channel of high-rise buildings. When there are more than 6 sets of residential buildings on each floor of the tower, it is recommended that the civil engineering should preferably adopt the tight decoration method of public corridor ceiling, so that most of the incoming lines of the electrical discipline can directly enter the households through the trunking laid on the ceiling. It can also be used to thicken the floor of public walkways, so that many electric conduits can be concealed. When laying pipes, electrical constructors shall try to reduce the number of overlapping layers of line pipes at the same point. (3) The wire layers shall not be close to each other side by side. If it is difficult to separate them obviously during construction, small cement blocks can be used to separate them. (4) . the electric conduit is embedded in the brick wall, and the distance from its surface is not too far. The new era Gold Testing Instrument Co., Ltd. was established in 2003. It should be less than 15mm, and the pipeline laying should be "horizontal and vertical"

Copyright © 2011 JIN SHI