Color of intrinsically safe wires in the control cabinet
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The Hg20512 specification requires that intrinsically safe signal wires and terminals be marked in blue – must the signal wires be blue? How to distinguish the positive and negative poles? But the neutral wire is generally also required to be blue or light blue – how is it distinguished from the intrinsically safe signal wire? Seeking advice from experts!
The outer insulation layer of the cable is blue, and the insulation layer for each wire core can be defined arbitrarily, such as red and blue, or red and white: lol
The connection terminals can be distinguished by color, while the color of the wires themselves is used for differentiation