In a control panel manufacturing factory, a senior electrician, Mr. Wang, was training a new technician named Jack.
The first batch of panels used standard copper terminals.
They provided excellent conductivity and strong crimping performance, but all terminals looked the same inside the cabinet.
When the customer requested a wiring modification, Jack spent a long time tracing the correct circuit among many identical copper terminals.
For the next batch, Mr. Wang switched to color-printed terminals.
Red was used for power lines, blue for neutral, yellow for control circuits, and green for grounding.
(1)Once the cabinet door was opened:
(2)Circuits were easy to identify
(3)Wiring errors were reduced
(4)Customer inspection became faster and more efficient
Mr. Wang said:
“Copper terminals ensure performance, while color-printed terminals improve efficiency and system management.”

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