The load is now a boiler. (See Figure 4, page 20.) This wiring diagram shows 120 V coming from L1 of a circuit breaker, through a switch, powering a boiler control and returning through L2, back to ...

Numerous diagrams have been developed for the solution of transmission-line problems, graphically illustrating relations between some of the afore-mentioned quantities. Among these, the modified Evans ...

Institute of Systems Engineering, Macau University of Science and Technology, Macao 200240, P. R. China ...