RVVP6 1 0 JDG25 CC BV 2 2 5 SYV 75 5 What does JDG25 CC mean? Is there two 25 wire pipes?

RVVP6: 6 square copper conductor PVC insulated shielded PVC sheathed flexible wires.

JDG25: 25mm set tube.

CC: Dark laying in the top plate.

BV-2*: 2 square copper conductor PVC insulated wires.

In general, the two 25mm set tubes are concealed in the top plate. Six shielded wires go through one of the tubes, and the other two copper core wires and one coaxial cable go through the other tube.

Indicates the specification and type of cable and the method of laying.

RVVP6*: Copper conductor PVC insulated PVC sheathed shielded flexible cable with 6 cable cores in the cable, and the cross-sectional area of each cable core is square millimeters.

JDG25: When there is no tray, the cable passes through JDG (set pipe) 25 and lays CC: concealed in the top plate.

BV2*: Copper conductor PVC insulated cloth cable, 2 cores, the cross-sectional area of the core is square millimeters.

75-5: The characteristic impedance of the cable is 75 ohms; The approximate outer diameter of the insulation is about 5 mm

RVVP: soft conductor PVC insulated wire with shielding layer.

6-core cable warp.

SYV: RF Coaxial Cable.

75 ohm insulation outer diameter approximate 3mm

PC: Wear a hard plastic pipe to lay.

25mm hard plastic tube outer diameter.

4 cores of rubber flexible wire square millimeter, wear 20 plastic pipes, TV cable SYV-75-3, wear 20 plastic pipes, CC--B means concealed along the floor slab; Why is there one?"＋"What about the number? --Side-by-side.

This is the line of the residential visibility**.

It is 2 kinds of lines that are first worn in a 25 PVC pipe, which should be a visual or monitoring system.

SYV is the meaning of the video line, 75 means its insulation outer diameter, 5 means the number of cores, RVVP2* represents the shield wire of the RV series, 2 is 2 cores, and the cross-sectional area is described.

In RVV-2*, RVV represents the sheath line and 2 represents the two cores, which represents the square millimeter of the cross-sectional area of the core.

In KBG20, KBG stands for Wear Yupai Conduit, and 20 means 20 mm in diameter.

In SYV-75-5, SYV represents the coaxial cable, 75 represents the cable impedance 75 ohms, and 5 represents the cross-sectional area of the wire diameter.

rvvp represents the shielded cable, 2 represents the two Qingqiao congratulatory core wires, and the destart-up represents the square millimeter of the cross-sectional area of the core.

WS stands for laying along the wall, that is, exposed piping.

48CAT5E: It refers to the 48 super 5BAI twisted pair network cables, which belong to the network DU

the cloth line of the network and the ** part;

2*(syv-75-5+rvv2*: refers to one.)

cat5e: Refers to.

BAI SYV-75-5: refers to DU

DAO PVC25: refers to a special PVC pipe with a diameter of 25 mm FC: Concealed application.

Genus is located in the ground CC: Concealed in the ceiling WC: Concealed in the wall. As for the number in front, it should be the quantity.

There is no contrast and there is no identification, and the softer the general feeling, the better the copper wire, and the elasticity is more. Regular wires are drawn with electrolytic copper. This test is empirical.

The purity of the copper wire should be measured by the composition of the inspection agency, and special tools must be required.

In fact, the most effective way is to measure the resistance of conductors. These wires are all GB wires, and the conductor resistance corresponding to the conductor cross-sectional area can be found in GB5023. The main measurement resistance value is less than or equal to the required resistance.

To put it simply, it's three steps.

1. Actually measure the cross-sectional area of the conductor.

2. Measure the conductor resistance.

3. Corresponding to the resistance value corresponding to the specified cross-sectional area, if it is less than the standard value, then the purity of the copper wire is qualified. If the conductor resistance is too large, it means that the purity is not enough.

If you want to accurately measure the specific copper content, you still have to go to some laboratories to measure it, but the fee is not cheap.

It came out in 5 minutes directly with the titration method, and you can ask me for a specific method.