DC Cable is the cable used for the products with DC (direct current) output
like all AC/DC adapters including laptop Adapter , desktop adapter, wall plug
adapter, Printer Adapter, and Linear Adapter and so on. The one end of dc cord is 2 or 3 open wires to connect with adapters
or chargers, the other end of dc Power Cable is
different dc jack, standard dc jacks for laptop adapter are 5.5*2.5, 5.5*2.1,
5.5*1.7, 4.8*1.7, 4.0*1.7, 3.5*1.35, , 3.0*1.0, 2.5*0.7, 2.0*0.6, 4.0*1.35,
6.3*3.0, 5.5*3.0 with pin, 7.4*5.0 with pin, 6.5*4.4 with pin, 4.5*3.0 with
pin, 4 pin, 4 hole, 5 hole oval, 3 pin, 3 hole, etc, and standard dc jacks for
tablet are 2.5*0.7, 3.0*1.0, 2.0*0.6, micro usb, and mini usb, etc.
Except dc jack, three main specifications are OD of cable, length of
cable and materials specifications inside of cable. OD means outer diameter, it
is normally 3.5mm for wall plug adapter, 4.0mm, 4.5mm, 5.0mm, 5.5mm for big
power laptop adapter and other ac/dc adapter. Length is normally 1.2m, 1.5m,
and 1.8m, also 2m, 3m, 5m are customized produce. The materials inside are pure
copper, CCA ( copper and Aluminum) and CCS (copper and steel), pure copper is
the best, CCA is second, CCS is the lowest, yidashun never uses CCS; And the
thickness for the materials inside are normally 0.15mm2, 0.19mm2, 0.2mm2, 0.33mm2,
0.41mm2, 0.5mm2, 0.75mm2, 1mm2, 1.25mm2, 1.5mm2, 2mm2 and so on. Normally we
use 0.15mm2 and 0.2mm2 for below 30W adapter, 0.41mm2 and 0.5mm2 for below 90W
adapter, and 0.75mm2 and more thickness for above 90W adapter.
DC Cable,DC Power Cable,Dc Solar Cable,DC Connect Cable Shenzhen Yidashun Technology Co., Ltd. , https://www.ydsadapter.com
(2) Nanjing Iveco
35.10 Light-duty vehicle Zhongnan Company produces air-conditioning circuit diagram (Figure 22).
The live wire of the air volume switch SR comes from the G9 terminal of the car ignition switch 15/A column control (in the central junction box), and the live wire of the relays F1, F2, F3, F4 is connected to the positive battery (red line, 2.5
(mm) 3), one end of the control coil is connected to a 2.5 (mm) 2 ground wire. When F1 is sucked, the evaporator fan is rapidly cooled; when F2 is sucked, the low-speed cooling F3 picks up the medium-speed cooling, and when the F4 picks up, the condenser fan and the compressor work at the same time.
The SR switch works as follows:
I block: Turn on the F2 relay, the current should reach the two evaporator fans through the overall speed reduction resistor, and cool (or ventilate) at low speed.
II block: Turn on the F3 relay, the current reaches the two evaporator fans through the speed reduction resistor, and the medium speed cooling (or ventilation).
III gear: Turn on the F1 relay, the current from the 30A fuse is directly connected to the evaporator fan, high-speed cooling (or ventilation).
The temperature control switch RP automatically closes above the set temperature value, so that the electromagnetic clutch is closed, the condenser fan is connected to the compressor, and if the switch is turned on, the switch SR only controls the ventilation air volume. 
September 22, 2022