Electrical distribution box wiring technical specifications

Below we will list several technical specifications for electrical distribution box wiring.

1、The wire should be connected to the designated terminal block correctly in strict accordance with the drawing markings.

2、Wire

A. The wire cross-section of the main circuit is marked in accordance with the drawing, the wire cross-section of the control circuit is 1mm2, and the wire cross-section of the multi-core cable is 0.3mm2.

B. 4mm2 (including) above the wire for the black RV type, 4mm2 below the wire for the white RV type, the cable sheath color selection black.

C. Stripping the wire insulation should be used to strip the special stripping tools, do not damage the core, nor damage the insulation not stripped, the incision should be flat.

D. Set the wire end of the insulation stripped length of L, when the wire end inserted into the terminal, L take the core inserted into the length of the tubular joint sleeve L1 plus 1 ~ 2mm, that is, L = L1 + (1 ~ 2), the wire stripped and terminal crimping, all copper wire must be through the terminal sleeve, 0.5mm2 wire must be folded through the terminal sleeve.

E. Can not use the terminal wire joints, insulation stripped should be laid on the solder, wire laying shall not be the middle butt, in special occasions need to butt, must use the welding method, welding after the heat-shrinkable tube protection.

F. Wires and components connected, should choose the shortest path, the cabinet PLC input circuit wiring as far as possible and the main circuit and other voltage level circuit control lines laid in the same line slot.

G. Wires and panel components connected to the panel wireless slot, should use winding tube protection. Panel harness and cabinet connection, should consider the cabinet door switch when the harness shall not be subject to friction.

H. Avoid several wires to the same terminal, components on the same terminal wire connectors shall not exceed 2, when two wire connectors to the same terminal, the contact should be flat paste, good.

I. The same line number of more wires and can not all be fastened on the terminal block, you can use the end terminal multiple crimp, but this practice is only suitable for control of the wire.

J. Wires and connectors between the welding, should be in the wire and connectors on the first laying on the solder, welding should be solid and reliable, welding must use heat-shrinkable tube protection.

K. Wires laid in the line groove should be flat, relaxed, no additional tension and pressure on the wire, nor the wire in the line groove squeezed into a mass.

3、Terminal

A. wire and component connections, must be pressed on the cold press terminals, except in special circumstances, shall not be stripped of the wire, directly to the device.

B. The terminal diameter of the line number tube must match the wire, the shape of the connection port must match the component terminals, control circuits can use fork-shaped terminals, motor terminals, heating power terminals, grounding terminals and some main circuit terminals, you must use ring terminals to increase the contact area, some connectors must use pin terminals.

C. Terminal crimping must use a special terminal crimping pliers, crimping when using the pressure interface must match the terminal, crimping, the wire and the terminal must be in good contact with each other, solid.

D. After the wire terminal crimping, connected to the component, should be through the nearest distance of the wire slot teeth, and the component end angle to maintain at 90 °, the tilt shall not exceed 5 °.

E. Terminals and components connected to the terminal, should be inserted into the terminal as far as possible, contact should be flat, good, screw tightening using the torque should be appropriate.

F. All the terminals must be set on the line number sleeve, the main circuit terminals after crimping, can not set on the sleeve, should use heat-shrinkable tube protection.

4、Wire number sleeve

A. Line number sleeve has two roles, one is to protect the bare terminal crimp part of the insulation, the second is to mark the wire line number.

B. Line number sleeve selection must match the cross-section of the wire, print the wire number, select the font size must match the tube diameter of the sleeve.

C. Control circuit line number length of 25mm, the main circuit casing diameter φ 5mm line number length of 30mm.

D. Before the terminal crimping, you must first set the printed line number sleeve, the sleeve should be set in the bare terminal sleeve part beyond 1 ~ 1.5mm, the font direction parallel to the front of the component.

E. After the terminal fastening, the corresponding line number in the vertical direction when looking at the flow of reading from the bottom up; in the horizontal direction when looking at the flow of reading from the left to the right.

F. Each wire ends of the line number is unique, forbidden a wire set with a different line number.

G. When the wire cross-section can not choose the corresponding casing, you can use nylon ties to fix the casing on the wire, read the flow direction as above, the cable markings are also used in the same way.

Through the above technical specifications of the power distribution box, you have further understanding of the distribution power box.