Precautions for hydropower construction

Precautions for hydropower construction
1. Waterway reconstruction
1. Don’t damage the original wire pipe or plumbing pipe when grooving. When laying electrical pipelines, you must thread pipes. Do not bury the wires directly in the ground or walls. This is not only unsafe, and once damaged, it cannot be repaired. After the plumbing pipe is laid, it must be subjected to a pressure test, and then the next process is performed after it is qualified to prevent damage to the pipe due to water leakage.
2. For parts that need to be waterproofed, such as the kitchen and bathroom, a closed-water test must be done after the waterproofing is completed.
Also note
(1) Generally, the water is changed to the top and not the ground. The cold and hot water outlets must be level. Generally, the left side is hot and the right is cool. The pipe laying needs to be horizontal and straight. The layout must be safe and reasonable. The position of the pipe clamp and the slope of the pipe shall meet the requirements of the specification. All types of valves should be installed in the correct and level position, which is easy to use and maintain. After the later construction, pressure testing is required.
(2) The water inlet should be equipped with an indoor main valve, and the water pipe and connecting parts must be checked for damage, blisters, cracks, etc. before installation.
(3) The installation position of the water meter should be convenient for reading, and the distance between the water meter and the valve from the wall should be appropriate, and it should be convenient for use and maintenance.
(4) If water softeners, water purifiers, small kitchen treasures, etc. are installed in the kitchen, consideration should be given to pre-preserving the location of the upper and lower water and the location of the power source.
(5) The cold and hot water pipes are all in-wall methods. When slotting, check the depth of the groove. The cold and hot water pipes cannot be the same groove.
2. Electrical installation
1. When wiring, the color of the phase wire and the neutral wire should be different; the color of the phase wire (L) of the same house should be uniform, the neutral wire (N) should be blue, and the protection wire (PE) should be yellow and green.
2. Before threading the pipe, put PVC glue on the direct head to avoid water ingress. When the power cord is threaded through the tube, the wire should be straightened and then threaded. Do not pull or pull the tube connector halfway; do not apply too much force when threading the weak wire to prevent the wire from breaking.
3. The power branch connector should be connected in the socket box, switch box, lamp holder box, each connector should not be more than two wires, and there should be a proper margin in the box.
4. The bottom box should be made for the sound line entering and exiting the wall. At the joint of the multi-core telephone line, the sheathing tube port is tightly wrapped with tape to prevent the telephone line from getting damp and causing crosstalk and other faults.
5. The TV antenna wiring must use a splitter and leave an inspection hole.
6. The power cord in the pipe must not have a connector, and the power cord must not be exposed on the ceiling or directly wiped into the wall to ensure that the power cord can be pulled or replaced.
7. The wire connection is firm, the joint is not tensioned, and the wrapping is tight. When using screws (nuts) to connect, the non-insulated distance of the wires is not more than 3mm, and the connection between copper wires should be crimped or twisted, and the twisted length is not less than 5 turns , Bare wires must be wrapped with waterproof tape first and then black tape. No defects such as damaged insulation layer are approved by inspection.