​Things about public transportation wiring harnesses

A circuit group is a total set of service equipment for a certain load source group, such as trunk lines, switching devices, control systems, etc. The basic research of service theory is to study the relationship between traffic volume, call loss, and harness capacity. Therefore, the harness is an important basic concept in the theory of voice service. Do you understand the composition of the public transportation wiring harnesses in our harness? Then let me introduce you to the composition of the traffic harness!

Here is the content list:

Cladding

Wires and cables

Cladding

The wrap of a public transportation wiring harnesses refers to what is wrapped around the outside of the cable. These include tape, bellows, PVC pipe, rubber sleeves, fiberglass sleeves, etc. The selection of wire harness wraps depends on the environment in which the harness is working. The environment of fuel car harness arrangement can be divided into in-cabin and out-cabin, with the in-cabin being the dry area and the out-cabin being the wet area. Cabin to the instrumentation harness as the main layout location, outside the cabin of the former cabin harness, chassis harness is the main, another roof harness (also known as the roof harness), floor harness, door harness, rear wiring harness, etc. Here we collectively called the small harness. Wet area to chassis parts, for example, chassis harness arrangement is often along with the overall frame across the front and rear, to achieve wheel speed, fuel pressure, exhaust temperature, and another chassis area of the function of information transfer. Due to the special nature of the chassis location, long-term in the road sand, dirt and stones, and another natural environment, rain inside will be in contact with moisture, so the chassis wiring harness almost all to the bellows for the wrap. The corrugated pipe has better wear resistance, ductility, high-temperature resistance, flame retardant, and other characteristics (general corrugated pipe temperature resistance in -40 ℃ -120 ℃). The difference in the way the corrugated pipe is wrapped can also be the corrugated pipe branch closed corrugated pipe and open corrugated pipe. The outer layer of the corrugated pipe is wrapped with PVC tape in the way of open corrugated pipe, and the way of dense winding is closed corrugated pipe. The closed bellows have better waterproof characteristics, but the process assembly is relatively complex, while the open bellows are more common in automobiles and simple to operate. Tape is the most common type of wrap for wire harnesses, and almost all harnesses have different types of wraps wrapped around the outside of the harness. Tape wrapped around the outside of a wire harness is good for binding multiple individual wires on the one hand, and on the other hand, it is very effective in terms of abrasion resistance, heat resistance, flame retardancy, and insulation. There are various types of tapes and different functions for different types.

Wires and cables

Public transportation wiring harnesses cable is the main component structure of the harness, consisting of copper core box outer insulation layer, the cable is divided into a variety of specifications according to the cross-sectional area of the wire, the following figure selected four different cross-sectional areas of the wire, from left to right are 0.5mm², 0.75 mm², 1.0 mm², 0.35 mm² (not sorted in order of size).

So with my little introduction, have you learned some of the components of a public transportation wiring harnesses? I hope my introduction has been helpful to you!