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 ...

Work with colleagues and see diagram changes in real time, as if working together in person. See where coauthors are working in the file and what they’re working on—down to the specific shape. Create ...