Circuits that fall under the requirements of Art. 725 are remote-control, signaling, and power-limited circuits that aren’t an integral part of a device or appliance. Article 725 includes circuits for ...

In hydronic heating, to control where heated water goes to various sections of a building, the system might rely on two or more zone valves. A zone valve opens or closes based on demand from a ...

Completing a late-model EFI engine swap is challenging enough without taking wiring into consideration, and while the wiring aspect of the swap is usually one of the last things people think of, it is ...