Inquiry information You have no unread inquiry information!
Please log in to the website background to view!
Hotline: 17711323778
/ EN
Page locationPage location : Home >  新闻中心 >  Company news

How to lay wires and cables in residential buildings? Sichuan cable manufacturers tell you

Release time:2021-05-14 Author:admin

What kind of wires and cables should be selected for different floor buildings, and what are the requirements for laying? In Sichuan cable manufacturers, antenna cable is specialized in the production and sales of all kinds of wires and cables. Next, let's analyze how the cables are correctly laid in buildings.

In the current building electrical design, the commonly used cables can be divided into the following categories: ordinary cable, flame retardant cable, fire resistant cable, halogen-free low smoke cable and mineral insulated cable.

Sichuan cable manufacturer

1、 Selection and laying requirements of wires and cables in residential buildings

The selection of wires and cables in residential buildings mainly refers to the provisions of "code for electrical design of residential buildings" and "code for electrical design of civil buildings". According to the specification, XLPE YJV power cable or PVC bv cable can be used for concealed common load cable in public area of multi-storey residence and high-rise residence; However, common load cables exposed in public areas of high-rise residential buildings are likely to be delayed in a fire. In order to reduce the injury to the people in the building, the power supply should use halogen-free low smoke flame retardant wdz-byj / yjy cables and wires; At present, the interior lines of residential buildings are concealed through pipes. Even if there is a fire, it is unlikely that all the wires will burn in a short time. The content of halide produced by the combustion and the scope of influence are limited. Therefore, BV wires can be concealed by threading pipes.

The laying methods include direct laying of cables, ladder laying of cables and laying of wires through protective conduit. If the cable is installed outside the effective structural protection body (such as in the ceiling), it is regarded as open laying, and the cable laid in the electrical shaft is not included. Wires can be used when crossing pipes. Wires and cables for fire loads. Different types of cables shall be selected for main fire power lines, emergency lighting lines and automatic fire alarm lines.

2、 Selection and laying requirements of wires and cables for other civil buildings

In general projects, the wires and cables for common loads are YJV cables with cross-linked polyethylene insulation and bv PVC wires. Halogen free, low smoke and flame retardant wdz-byj / yjy cables are used in high-rise buildings, important public places and other buildings with high fire protection requirements《 Code for fire protection design of wires and cables in civil buildings further classifies various places and defines the wires and cables to be used in each place.

Sichuan power cable manufacturer

Therefore, the common cable YJV can be used in the common load power supply station, and the cables used in other special grade and first-class places should be halogen-free low smoke wdz-byj / yjy, and the cables used in second-class places should be halogen-free low smoke wdz-byj / yjy. When laying through pipeline, common conductor bv can be used. Under the action of external fire, where line integrity and power supply should be maintained, fire resistant wires and cables nhbv / YJV or mineral insulated cables bttz should be used. The mineral insulated cable bttz is used as the main power line of the special important load in the special grade and first class places. Mineral insulated cable bttz shall be used for main power line of important wood structure public buildings.

Wires and cables for fire load mainly refer to the code for electrical design of civil buildings, code for fire protection design of wires and cables of civil buildings and new code for fire protection design of buildings. Mineral insulated cable bttz is used as the main power supply line for fire fighting facilities in special places as shown in table 4.0.1. Wdzn-byj / yjy cable with halogen-free, low smoke, flame retardant and fire resistance shall be used for emergency lighting. Halogen free, low smoke, flame retardant and fireproof wdzn-byj / yjy cable is used for automatic fire alarm line. Mineral insulated cable bttz and halogen-free low smoke flame retardant wdzn-byj / yjy cable should be used for the power supply trunk line of fire-fighting facilities in grade I places; Wdzn-byj / yjy cable with halogen-free, low smoke, flame retardant and fire resistance shall be used for emergency lighting. Halogen free, low smoke, flame retardant and fireproof wdzn-byj / yjy cable is used for automatic fire alarm line. The concealed part can be flame retardant and fire resistant znbv / YJV cable. 2、 The power supply trunk line of fire-fighting facilities in grade III places adopts ordinary flame-retardant and fire-resistant znbv / YJV cable; Ordinary fire-resistant nhbv / YJV cable is used for emergency lighting. The common fire-resistant nhbv / YJV cable is used as the automatic fire alarm line.

The above are the methods and requirements for the selection and laying of wires and cables in residential buildings. For more information, please pay attention to the website of Sichuan cable manufacturers.