The selection of the method of carrying wires is based on two points: the cost of the components and the cost of work. Although metal pipes (conduit) may appear cheap initially, they tend to be the most costly option when the job is finally complete, since they consume a lot of time to install. Take Joe, an electrician in a midsize manufacturing plant. Joe quickly realized the difference between spending 15. Choosing between cable tray and conduit systems significantly impacts project cost, installation time, and long-term maintenance.