In general, the simpler a thing is, the better. That doesn’t appear to apply to engines, though, at least not how we’ve been building them. Pistons, cranks, valves, and seals, all operating in a ...

Art. 440, Part 2 provides the requirements for the disconnecting means of the hermetic motors used in HVAC and refrigeration equipment. These disconnects are often accessible to unqualified persons, ...