Tape - colours standard yellow/green small — PVC electrical insulating tape for insulating low-voltage wiring, bundling harnesses and marking phase sequence. Choose the colour by purpose: green-yellow is reserved for earth identification, yellow, green and red follow phase sequence, while black, white and blue suit general wrapping. Before wrapping, confirm the circuit is de-energised and the surface is free of oil and grease; overlap each turn by about 50% and press the end down flat. Colour is only a marker: dielectric strength and flame rating decide whether the tape may be used on live parts, so use a weather-resistant grade for hot or outdoor work. Check width and roll length against the job before ordering; the colour is what this item name states, the specification is on the physical label.