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Busbar arrangement and color marking

Busbar arrangement and color marking

 

4.2 Provisions for selecting wire colors according to the circuit (GB2681) (see Table 6)

4.3      Table 6

busbar machine cnc

 Serial number

Circuit

Busbar color code

   1

  Phase A of an AC three-phase circuit

                        Phase B

                        Phase C

     Neutral or neutral

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    Ground wire for safety

Yellow

Green

Red

light blue

Yellow and green

   2

    Positive pole of DC circuit

                       negative electrode

     Ground intermediate

Brown

Blue

light blue

 

Note: A. The surface of the low-voltage cabinet busbar is tinned, and the color code of the color specified in the table is pasted on the maintenance surface busbar of the cabinet body.

     B. The surface of the busbar of the high-voltage cabinet is tinned, and then the color code of the color specified in the table is pasted on the busbar of the maintenance surface of the cabinet body.

 

4.5 The arrangement of busbars shall meet the requirements of Table VII                  Table七

Differ

Vertical arrangement

Horizontal arrangement

Downline

A

on

Rear

left

B

in

in

in

C

under

before

right

Neutral

Bottom

First

Most right

positive electrode

Up

Rear

left

negative electrode

under

before

right

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Description: 1. The orientation is based on the front view of the screen.

       2. Under special circumstances, for example, the arrangement of low-voltage cabinets will cause difficulties in bus bar configuration, and it is allowed not to comply with Table 7.

       3. When the high-voltage cabinet 35KV cabinet is used for communication, the down wires are arranged vertically, and the regulations in Table 7 are not followed.

 

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