It’s been more than 100 years since the first alternating current power station at Niagara Falls came online. Since then, the United States and eventually the world have been transformed by the ...

A 240-volt service powers heavy-duty appliances like ovens, air conditioners, water heaters and electric ... and bare copper ground wire are clamped to the common neutral bar.

if the ground bar is similarly an uncovered spaded panel and they are too close together, some metal object could easily fall across the power and ground terminals, shorting and causing a fire. Take ...