On electrical plans, a pathway for electrical wiring is generally represented by solid or dashed lines. These lines indicate the route of the protective tubing that houses the wires. Standard symbols are used to denote the type of material, such as rigid metal or electrical metallic. Junction boxes, pull boxes, and termination points are also shown with specific symbols at intervals along the indicated route, or at changes in direction.
This representation is crucial for proper installation and maintenance. Accurately documenting the wiring infrastructure allows electricians to efficiently install wiring, troubleshoot problems, and make future modifications or expansions. Having detailed, easy-to-read pathways on plans ensures code compliance and worker safety. Historically, detailed drawings prevent incorrect installations.