(1) Determine the type of cable

The type of cable should be determined according to the application system contained in the integrated wiring system. For computer networks and telephone voice systems, 4 pairs of twisted cables can be preferred. For occasions with high shielding requirements, you can choose 4 pairs of shielded twisted twisted wires; for occasions with low shielding requirements Cable cable. For a cable TV system, a 75Ω coaxial cable should be selected. For cases with high transmission speed or high confidentiality, optical cables should be selected as horizontal cloth cables.

(2) Determine the length of the cable

To calculate the horizontal wiring of the entire building, first calculate the line consumption of each floor, and then summarize the line consumption of each floor. The calculation formula for the line volume of each floor is as follows:

C = [0.55 (f+n) +6] × m

Among them, C is the line of each floor, F is the distance between the longest information socket from the management room management. N is the distance between the recent information socket from the floor management room. M is the number of information sockets on each floor. 6 For the tolerance of the end (mainly considering the loss of cables and the length error of cable cloth setting at the construction).

The line of the entire building: s = σmc, M is the number of floors, C is the line consumption of each floor.

Application example: It is known that there are 6 floors on a certain floor, and the number of information on each floor is 20. The longest information socket on each floor is 60 meters away from the management room management room. The distance is 10 meters, please estimate the line of the entire building.

Answer: According to the requirements requirements:

Floor number m = 20

Far -point information socket distance from management room F = 60M

Recently, the distance between the distance between the point information socket is n = 10m

Therefore, the line volume C = [0.55 (60+10) +6] × 20 = 890m on each floor

The entire building has a total of 6 floors, so the line consumption of the entire building s = 890 × 6 = 5340m