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This does not include the uninsulated ground wire. For instance, if the cable lists "12-2 AWG", it means there are two insulated 12-gauge wires (a black and a white wire), plus a ground wire. If the label says "12-3", this cable has four conductors—three 12-gauge insulated wires and a bare copper ground wire. [5]
For example, NM 14-2 cable contains three conductors (two plus one ground) at 14 gauge, a size typically used for circuits protected at 15 amperes. Circuits with larger currents (such as for electric furnaces, water heaters, air conditioners, or sub-mains to additional circuit panels) will have larger conductors.
The first 8000 series electric conductor alloy, still widely used in some applications, was developed and patented in 1972 by Aluminum Company of America . [8] This alloy, along with AA-8030 (patented by Olin in 1973) and AA-8176 (patented by Southwire in 1975 and 1980), performs mechanically like copper.
Modern two or three-wire+ground PVC-insulated cable (e.g., NM-B), produced by such brands as Romex [citation needed] Aluminum wire was used in the 1960s and 1970s as a cheap replacement for copper and is still used today, but this is now considered [by whom?] unsafe, without proper installation, due to corrosion, softness and creeping of ...
Each phase of the circuit is run in a separate grounded metal enclosure. The only fault possible is a phase-to-ground fault, since the enclosures are separated. This type of bus can be rated up to 50,000 amperes and up to hundreds of kilovolts (during normal service, not just for faults), but is not used for building wiring in the conventional ...
Peek, F.W. (1929). Dielectric Phenomena in High Voltage Engineering. McGraw-Hill. ISBN 0-9726596-6-8. Loeb, Leonard (1965). Electrical Coronas Their Basic Physical Mechanisms. University of California Press. ASIN B0006BM4LG. Cobine, James D. (1941). Gaseous Conductors; Theory and Engineering Applications. McGraw-Hill or Dover reprints. ASIN ...
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