Low-voltage junction box, as the name implies, is a concentrator for weaker voltage lines, commonly used in modern home renovations, such as network cables, telephone lines, computer monitors, USB cables, TV VGA, color difference, antennas, etc., can all be placed inside; however, if these items are not arranged in order, they become a tangled mess, appearing disharmonious and affecting cleaning. In summary, the low-voltage junction box is used for housing these devices and organizing cables.
Brief introduction
In 2002, the country initiated a policy to separate low-voltage and high-voltage electricity, leading to the emergence of low-voltage cabinets. These cabinets are primarily used for the unified management, distribution, and wiring of low-voltage signals in homes, including networking, telephony, television, and security wiring. Their main purpose is to prevent interference from high-voltage signals, thereby enhancing the quality of life at home. By 2007, their use expanded significantly. In 2007, the country standardized the use of multimedia information cabinets in Shanghai, Suzhou, and Fujian as pilot markets. Following this, markets across the country began to emulate the use of low-voltage cabinets, leading to their widespread adoption by real estate developers.
Low-voltage electrical box, also known as smart home wiring box, multimedia box, wiring cabinet, home wiring box, integrated wiring box, corridor box, integrated cabinet, line passing box, multimedia information box, distribution box, home multimedia box, home information access box, multimedia wiring box, multimedia wiring cabinet, home information cabinet, residential information wiring box, home wiring cabinet, smart wiring box, smart cabinet.
Difference in Strength
Difference between a power distribution box and a low-voltage distribution box
In residential building construction, intelligent building electrical technology encompasses two main categories: strong power and weak power. The strong power entering the residential distribution box has already resolved the issues of centralized control and management; however, the information sources carrying voice, images, and data, with numerous and increasingly complex lines, bring about numerous inconveniences for users in terms of usage, distribution, and maintenance. Therefore, the adoption of integrated weak power products to standardize weak power wiring has become an essential project for future home renovation and the realization of intelligent buildings. To meet the demand for weak power products, new intelligent multimedia home information access boxes, wiring boxes, and weak power boxes have been introduced. These can connect transmission devices for voice, data, images, and security, as well as devices for control and management. They fundamentally alter the issues of unclear images, loud telephone noise, and slow broadband network speeds caused by DIY wiring in residential homes. They effectively address the access issues for home phones, the internet, cable TV, and more, avoiding various network problems caused by conventional wiring system failures, as well as the repeated investment in re-wiring due to environmental changes. This not only saves material resources but also human resources.
Key Advantages
Benefits of Low-Voltage Electrical Boxes:
One, Centralized wiring management for home low-voltage signal cables enhances overall aesthetics. It also allows for resource sharing: with just one VCR/sound system/satellite receiver, you can watch movies or enjoy background music in every room. Multiple computers can connect to share a broadband service; multiple phone lines can be answered and transferred freely.
Two, separate high and low voltage wiring. The eddy current induction from high voltage wires will not affect the low voltage signals, making the low voltage section more stable.
Section 3: Compliant with urban residential building integrated cabling system engineering design specifications and other standards, meeting the interface requirements of today's information appliances, and adaptable to future new technologies and products. Truly achieving a "one-step solution."
Four, safety and clarity, easy to maintain. New assembly structure or home bus system, secure and reliable. Functional modules separate inputs and outputs, clear at a glance, maintenance and upgrades without the need for professional assistance. All modules are designed for plug-and-play, requiring no professional wiring tools or installation personnel, allowing residents to install them independently.
Five: Strong Scalability - Structured design with good scalability and upgradability to meet the current and future needs of different users. New outdoor wiring, simply connect it to the smart multimedia box without pulling new lines or re-digging slots for wiring. It offers greater convenience for self-management of low-voltage wiring. For real estate developers, it adds little cost to enhance the selling points of houses, benefiting both residents and property sales.
Six, High performance-to-price ratio, with less expense, we save you many troubles in the future.
Application Fields
Low-voltage cabinets are widely used in smart home, intelligent building, building intelligence, smart electrical engineering, low-voltage engineering, system integration, smart community, building automation, building intelligence, building electrical, building appliances, structured cabling, home wiring, network wiring, smart wiring, wiring systems, wiring world, home local area network, home network, home decoration, home renovation, residential decoration, residential renovation, intelligent home appliances, and various engineering projects.
Key Points for Home Wiring: Power and Low Voltage Distribution
During home renovation, all indoor wiring should be laid in conduits and use single-core copper wires with good insulation. When laying in conduits, the total cross-sectional area of the wires should not exceed 40% of the conduit's internal diameter, and there should be no joints or twists inside the conduit. Wires should not be installed in the same conduit as telephone lines, cable TV lines, communication lines, etc.
2. Pay attention to wire routing during cabling. Construction should be performed according to the decoration design specifications. The protection against short-circuits, overloads, and selection of wire cross-sections, as well as the installation of low-voltage electrical equipment, should be carried out in accordance with the current national standards.
3. A residual current circuit breaker should be installed inside the distribution box, with branch lines for lighting, air conditioning, power outlets, etc., ensuring each circuit operates the load normally.
4. Heaters must not be installed with standard outlets and should not be mounted directly on combustible structures. In the bathroom, it is advisable to use splashproof outlets.
5. The selection of wire cross-sectional area for lighting and electrical heating loads should ensure that the safe current carrying capacity of the conductor is greater than the sum of the rated current of all appliances in the branch circuit. The capacity of each branch circuit should not exceed the capacity of the main incoming line. The color coding for high-voltage wires should use different colored wires, with phase wires in red, green, or yellow, neutral wires in blue or black, and grounding wires in alternating yellow and green双色 grounding wires. The grounding protection should be reliable, and the insulation resistance between conductors and between conductors and ground should be greater than 0.5MΩ.
6. Outlets should be no less than 300mm from the ground. Leave extra length in the wiring within the junction box, approximately 150mm. When connecting wires, the live wire goes into the switch, the neutral wire directly into the light socket, and the live wire of a screw-in light socket should not be connected to the case. The height of the lighting switch from the ground should be about 1.3m, and the switch should not be installed behind the door.
7. Electrical piping within suspended ceilings must comply with exposed piping requirements and should not be mounted on the ceiling suspension or grid. The placement of light socket boxes and junction boxes should facilitate maintenance and be covered with a lid. For installations using flexible hoses connected to light positions, the hose length should not exceed 1 meter. Both ends of the flexible hose should be connected to the junction box with connectors, ensuring a secure connection for the lighting fixtures. The metal flexible hose itself should be grounded for safety. All types of strong and weak current wires must not be exposed within the suspended ceiling.
8. The phase and neutral wires for power outlets are positioned right for phase and left for neutral. Outlets with a grounding hole should have the grounding pin in the top position, ensuring reliable grounding. The switch outlets should be securely installed. Inspections should be conducted by visual and manual methods, and the circuit testing tool should be used to verify that the phase, neutral, and grounding wire positions on the outlet meet the requirements.
9. The spacing between conductors and gas pipelines should be ≥100MM on the same plane, and ≥50MM on different planes. The distance between electrical switch joints and gas pipelines should be ≥250MM on the same plane, and ≥150MM on different planes.
10. Telephone lines, TV signals, and audio connection wires are separately laid out in branching conduits. Signal transmission lines are used, and an adequate spacing is maintained between them to prevent interference among different signals. The shielding mesh of the TV signal transmission lines is trimmed neatly to avoid a short circuit with the center wire, otherwise, it may cause unclear images. TV and telephone connections use "connectors." Use a multimeter to check for open circuits, inter-circuit breaks, etc., and use an ohmmeter to check grounding, etc. After inspection and confirmation of compliance, seal them.
