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 ...

Preliminary investigations by the Bicholim fire services suggest that a short circuit may have triggered the blaze. Fortunately, the residents were awakened by the heat in time and managed to escape ...