一, Design phase: Precise positioning and circuit planning
1. Analysis of spatial functionality and lighting efficiency requirements
Lighting scene positioning: Divide lighting areas based on spatial functions. For example, the living room TV wall needs to reserve a 12V/24V low-voltage light strip pipeline, which can be paired with dimming drivers to achieve ambient lighting; The kitchen countertop needs to reserve a linear light pipeline at the bottom of the hanging cabinet to ensure an operating illumination of over 500lux.
Light effect combination design: Linear lights are often used in combination with spotlights and magnetic track lights. For example, a high-end residential project adopts a "linear light+anti glare tube light" scheme in the living room, which achieves independent wiring of two types of lamps through a 20mm pre embedded wire slot on the top surface to avoid signal interference.
2. Circuit layout and power point planning
Power supply location selection: Following the principle of "nearby power supply", transformers should be hidden in maintenance ports, air conditioning vents, or customized cabinets. For example, the bedroom bedside linear light can have a transformer embedded behind the bedside table and connected to the light strip through a 15cm deep cable tray.
Segmented power supply strategy: When the length of the linear lamp exceeds 15 meters, segmented power supply is required to avoid voltage drop. A certain commercial exhibition project adopts a design of "one set of power supply every 10 meters", which achieves parallel power supply through the embedded double line tube on the top surface to ensure uniform brightness of the light strip.
3. 3D space pipeline collaboration
Top pipeline integration: Combine central air conditioning and fresh air system pipelines for comprehensive layout. For example, a certain LOFT apartment project optimized pipeline routing through BIM technology, arranging linear light pipes in parallel with air conditioning condensate pipes, saving a floor height of 5cm.
Wall pipeline pre embedding: Wall linear lights need to be pre embedded with U-shaped cable trays during the water and electricity stage. The guest room project of a certain hotel adopts the process of "pre embedded 10mm thick aluminum profiles+surface plastering" to achieve seamless connection between the light strip and the wall.
二, Construction phase: Standardized processes and key control points
1. Material selection and acceptance criteria
Specification of conduit: For low-voltage light strips (12V/24V), a Φ 16mm PVC flame-retardant conduit should be used, while for high-voltage light strips (220V), a Φ 20mm metal hose should be used. A fire was caused by a short circuit due to the use of non flame retardant conduit in a certain project, and it is emphasized that it must pass the GB/T 8814 standard certification.
Connection requirements: The conduit elbow should use a 45 ° elastic elbow with a bending radius of ≥ 6 times the pipe diameter. A construction site experienced difficulty in threading due to the use of a 90 ° right angle elbow, resulting in rework losses of up to 20000 yuan.
2. Slotting and fixing process
Top slotting specification:
Concrete top surface: using a water drill for slotting, depth ≥ 25mm, width=pipe diameter+10mm.
Gypsum board ceiling: Cut with an art knife, with the depth of the cut controlled at 1/2 of the board thickness to avoid damaging the keel.
Key points for wall slotting:
Load bearing wall: slotting depth ≤ 30mm, steel wire mesh needs to be hung to prevent cracking.
Lightweight partition wall: Special cutting machine is used, and wooden blocks are embedded in the groove to enhance the nail holding force.
3. Wiring and connector handling
Thread sequence: Thread the main wire (BV2.5mm ²) first, then the light strip control wire (RVV2 × 1.0mm ²). Due to the difficulty of replacing the light strip line in the later stage of a certain project, the labor cost increased by 30%.
Joint process:
Power connector: WAGO terminal block is used, combined with heat shrink tubing insulation.
Lamp strip connector: Use a dedicated connector to avoid virtual connections caused by manual welding.
4. Acceptance criteria for concealed works
Insulation test: Use a 500V megohmmeter to test, with insulation resistance ≥ 0.5M Ω.
On/off test: Confirm that all circuits are conductive and there are no short circuits/open circuits using a multimeter.
Identification management: Paste color code labels at the end of the online pipe, with red representing strong electricity, blue representing weak electricity, and green representing light strip control lines.
三, Typical scenario solutions
1. Living room suspended ceiling linear light
Key points of construction:
Pre embed a Φ 20mm conduit above the secondary keel of the suspended ceiling, 150mm away from the wall surface.
The transformer is hidden inside the air conditioning maintenance port and fixed with spring clips.
The light strip adopts a cutting design, with a 5cm adjustment margin reserved per meter.
2. Linear lights on the background wall of the bedroom headboard
Innovative technology:
Using pre embedded aluminum profiles, the profile depth is equal to the thickness of the light strip plus 3mm.
When plastering the wall, embed alkali resistant fiberglass mesh to prevent cracking.
The power cord is led to the socket under the bedside table through the concealed groove of the skirting board.
3. Linear lights for kitchen cabinets
Waterproof treatment:
Apply silicone structural adhesive to seal the interface of the conduit.
The transformer is installed inside the cabinet, away from the water tank area.
The light strip adopts IP65 protection level and is paired with a waterproof acrylic face mask.
