Spectrum Field Technician 1 Practice Test

The color black is commonly used to indicate the "hot wire" in electrical wiring systems. In most wiring standards, hot wires are those that carry electricity from the power source to the load, and they are usually set apart by specific colors to prevent confusion and ensure safety.

Using black for hot wires helps technicians and electricians easily identify which wires they should handle with care when performing installations or repairs. This color coding is standardized in many electrical codes, making it a crucial part of electrical safety practices.

Other colors, such as red, green, and blue, serve different purposes in wiring; for instance, red is often used for secondary hot wires, green typically indicates ground wires, and blue may be used for travelers in three-way switch circuits.