There are several main forms of the transfer box, such as overhead type, floor type, and handover type.
1. Installation of overhead transfer boxes
(1) An overhead transfer box can be installed when the following conditions are met:
1 The wiring cable for accessing the junction box is an overhead mode;
2 Suburbs, industrial and mining areas and other areas where buildings are scarce;
3 does not have the conditions to install the floor-standing transfer box.
(2) The installation steps of the overhead transfer box are as follows:
1 vertical H bar
2Installing accessories such as poles and nails
3 installation work platform
4 installation of the transfer box
5 put into the end cable
6 buried iron pipe
7 making a gas plug outside the box
8 Remaining operation and the same part of the floor-type transfer box operation
2. Installation of floor-standing transfer box
(1) The floor-standing transfer box can be installed with the following conditions:
1 The main cable entering the transfer box is 600 pairs, and the transfer box capacity is above 1200 pairs;
2 The geographical conditions are safe and stable, and the environment is relatively stable;
3 There are conditions for building the hand hole and the base of the transfer box, and can communicate with the manhole;
4 The trunk cable and distribution cable of the access junction box are ducted or directly buried.
(2) The installation steps of the floor-standing transfer box are as follows:
1 base cable tube and pre-buried bottom frame arrangement
2 installation of concrete base
3 installation of the transfer box
3. Connection room, handover patch panel installation requirements
The location of the junction should generally be selected in the ventilated place of the sun, with an area of ​​about 10 to 15 m2. It is advisable to choose a floor in the residential area, and the cable is easy to enter the room.
(1) Underground cable channel: the width is not less than 600mm, the depth is 40mm, the length can be determined according to the specific conditions, and the upper port of the channel needs to be equipped with a cover plate.
(2) If the cable passage cannot be made in the transfer room, the floor can also be laid.
(3) The distribution patch panel can be divided into two types: vertical and wall. The vertical position is set on one side of the ground trough; the upper end of the wall type shall not exceed 1800 mm from the ground. The terminal block can be used as a module terminal block and a rotary clip terminal.
(4) Each cable shield grounding and grounding bar should be connected to the grounding bar.
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Label: Cable transfer box Concrete base Cable channel Installation method Installation requirements
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