1. the great circle on a sphere or heavenly body whose plane is perpendicular to the axis and everywhere equidistant from the poles. 2. the great circle of the earth that is equidistant from the North Pole and South Pole. 3. a circle separating a surface into two congruent parts. 4. celestial equator. [1350â1400; Middle English < Medieval Latin aequÄtor, Latin: equalizer (of day and night, as when the sun crosses the equator).
For potable water use, galvanized iron piping was commonplace in the United States from the late 1800s until around 1960. After that period, copper piping took over, first soft copper with flared fittings, then with rigid copper tubing utilizing soldered fittings.oday, most plumbing supply pipe is made out of steel, copper, and plastic; most waste (also known as soil) out of steel, copper, plastic, and cast iron. The straight sections of plumbing systems are called pipes or tubes. A pipe is typically formed via casting or welding, whereas a tube is made through extrusion.
Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s. The invention of the telephone in 1876 created further demand for copper wire as an electrical conductor.Copper is the electrical conductor in many categories of electrical wiring.Copper wire is used in power generation, power transmission, power distribution, telecommunications, electronics circuitry, and countless types of electrical equipment. Copper and its alloys are also used to make electrical contacts.opper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s. The invention of the telephone in 1876 created further demand for copper wire as an electrical conductor.