Circuit Modification Guidelines:
1. Before cutting into walls or floors, use cartridges to mark the positions. Ensure that a 15mm layer of dust is left on the surface of the pipes and walls to prevent cracking during the process.
2. Never alter or damage public electrical facilities such as lightning protection grounds or protective grounding systems without proper authorization.
3. When burying power lines, keep them at least 500mm away from weak current lines. Maintain a minimum distance of 300mm between power lines and hot water or gas pipes to avoid interference and safety risks.
4. Try to minimize the number of wall-mounted pipe runs. Avoid placing mirrors, furniture, or other fixtures in areas where electric hammers or nails might accidentally hit the pipes during installation.
5. In general, switches should be installed between 1200-1500mm from the floor and 150-200mm away from doors. Sockets are typically placed around 300mm from the ground. Ensure all outlet switches are on the same horizontal line with a height difference of less than 8mm. The parallel installation difference should not exceed 1mm, and they should not be obstructed by sliding doors or furniture.
6. Install a variety of strong and weak electrical outlets, ensuring no shortages. For example, place power outlets and telephone sockets on both sides of the bed, near the computer desk, and install more than three power outlets on the wall of the living room TV cabinet. Also, include appropriate TV, telephone, multimedia, and broadband network outlets.
7. The laying methods for audio, television, telephone, multimedia, and broadband network cables should be similar to those used for power cables. These sockets or boxes should be installed alongside power outlets. However, it is strictly prohibited to share the same conduit for both strong and weak electrical lines.
8. All internal wiring must be enclosed in PVC flame-retardant tubes of at least 16mm in diameter. The wires should occupy less than 40% of the tube's space, and connections should be made using special interface parts to ensure a secure fit.
9. When using conduits, power lines should pass through the floor with a reasonable turning radius. Pay special attention to underground casing and ensure that the glue is tightly sealed. Before closing the floor, protect the PVC pipes from breakage. When laying floor tiles, make sure the PVC casing is fully covered with cement mortar for added stability.
Water Pipeline Modification Guidelines:
1. First, determine the direction of the water pipes based on the design drawings and the structure of the room. Water pipes can be arranged in different ways: ceiling routing, wall groove installation, floor routing, or exposed piping. Discuss which method is most suitable with your renovation team.
In general, the principle of water pipe grooving is “run vertically and not horizontally†to maintain structural integrity and ease of maintenance.
2. The width of a single groove is 4cm, while a double groove should be 10cm wide. Wall grooves should be 3-4cm in width. Ensure that the grooves are straight and properly aligned both horizontally and vertically. The depth of the groove depends on the type of equipment being installed.
3. Keep a space between hot and cold water pipes. Hot water circulates through the heater, and if hot and cold pipes are too close, the cold water may also get heated, causing unnecessary heat loss in the hot water system.
4. For drilling holes, if a single water pipe requires a 6cm hole, two pipes would need a 10cm hole or two separate 6cm holes to accommodate the installation.
Pro Tips from the Editor:
1. When grooving, you may encounter reinforcing bars in load-bearing walls. These bars support part of the structure, so be cautious to avoid damaging them during the process.
2. If waterproofing is required, complete it before installing any electrical work. Ensure that all wire brands, junction boxes, and connectors meet the contract specifications upon entry into the site.
3. It’s important to note the calculation of trunking. Some decoration companies charge per bushing, but if multiple wires are run through one groove, the cost is calculated based on the number of wires multiplied by the length. This often leads to higher charges when there are multiple grooves. To avoid this, clearly communicate the size and plan with your designer early on, and create a detailed hydropower layout to prevent future issues.
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