Wire Identification, Numbering, and Labeling
Option 1 — Numeric Identification (00–99 / 000–999)
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Use two heat-shrink color bands to identify wires (00–99).
For 000–999, use three bands. -
Obtain 10 different colored heat-shrink tubes (e.g., 1/8" or 3/16", or ~3 mm I.D.).
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Cut 2–3 mm rings from each color.
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Place the rings on both ends of the wire, then shrink using hot air.
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Cover the rings with clear heat shrink to prevent movement and improve durability.
Option 2 — Functional Color Coding
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Use specific color ring combinations to indicate wire function.
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Example:
- Three black rings → Ground (GND)
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This method can supplement or replace numeric identification.
Option 3 — Written Labels
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Cut a 1 cm length of white 1/8" heat shrink.
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Insert a thin, stiff material (e.g., ~1/32" PCB) to flatten and stabilize the tubing.
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Using a fine-tip permanent marker (e.g., ultra-fine Sharpie), label the wire’s function (e.g. +12V).
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Remove the insert and pass the wire through the labeled heat shrink.
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Apply heat to shrink it onto the wire.
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Cover with a 2 cm length of clear heat shrink to protect the label from smudging and wear.
- Shrinking your writing makes it smaller and gives sharper edges.
