What do dashed or dotted lines in wiring diagrams typically represent?

In wiring diagrams, dashed or dotted lines are used to indicate field-installed wiring. This representation is important because it distinguishes wiring that is added or modified after the factory installation from the wiring that was originally part of the equipment's assembly. Understanding this distinction helps technicians identify which parts of the wiring system require attention and clarifies which modifications have been made during installation or maintenance.

Field-installed wiring usually connects additional components or allows for customized configurations based on specific installation needs. Recognizing these dashed or dotted lines ensures that the technician can troubleshoot or modify the system without confusing it with the factory-installed circuits. This clarity is essential for effective maintenance and ensures that any work done complies with safety standards and best practices.