Wires can be marked with _______?

Wires can be marked with self-sticking numbers or letters, which provide a clear and efficient way to identify different wires, especially in complicated setups like machine rooms or hoistways. This method allows for easy application and can be repositioned if necessary without causing damage to the wire insulation. Marking wires in this manner ensures that technicians can quickly and accurately identify wiring during installation, maintenance, or troubleshooting, thus enhancing safety and efficiency in electrical work.

Using permanent ink is less reliable as it can smudge or fade over time, making it difficult to read. Colored stickers may not adhere well to wires and can come off, leading to confusion regarding wire identification. Tape, while useful for a variety of purposes, does not offer the same versatility and visibility as self-sticking markings specifically designed for categorizing wires, which can lead to limitations in their effectiveness for long-term identification. Overall, using self-sticking numbers or letters is the most practical and durable solution for marking wires.