Copper cable 3x50 cable can bring the number of kilowatts
You say the phenomenon I know, you do not worry, because the interface is connected with a thread, the cement in the sand is not get in, can only go into a small amount of cement slurry, and mud in the cement itself Put the gap between the interface blocked, and can not finish into the inside, rest assured, you said the phenomenon will not appear.
I think you said the problem is the construction of the first problem, because the pipeline problem, the beam is very common, but the beam position is not on the joint. Second, if the interface is galvanized pipe, then the gap should be quite small, there will not be a large gap should not have poured into the. Third, to talk about it, a construction engineer told me that when the problem occurs, will be from a head through the fine wire, do not head to fifteen kilometers of the distance tied three small ball, and then Pull out the ball, because the three different positions of the ball can gradually break the pipe in the foreign body. And finally use high-pressure air to block all the nozzle, keep one, hit the high pressure air can basically blow out.
You say this situation, in the modern building concealed line building is a more common problem, cement casting before the embedded pipe due to the late construction caused damage, in general, more PVC pipe, since it is galvanized iron First, the pipe wall will not be destroyed, you can not consider the main problem is the pipe and the pipe interface is not strong, there are gaps, the market directly, bending, three links are only locked with a nut Of the method to be fixed in the cement slurry with the role of vibration rod, the liquid slurry on the seamless, the most simple and effective way is in the interface before the nozzle first marked with a layer of glass glue, with the lock after the nut, With a transparent tape wrapped around the solid, over the beam, with fine wire to tighten the wire tube and barbed together, after casting, immediately with fine steel wire through the experiment, found that the block, timely treatment. As for the junction box blockage is easier to handle, embedded in the junction box before: . in the next box position on the paint applied to the template, easy to cement after solidification, remove the template to find a box convenient. . with the wood chips to fill the box filled, transparent tape wrapped around the solid, easy to clear after the box, but also to prevent the junction box into the pulp. . is the junction box and the building of the wall or ribs with fine iron wire tie to prevent the cement casting "floating box."
