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  2. Thermoplastic-sheathed cable - Wikipedia

    en.wikipedia.org/wiki/Thermoplastic-sheathed_cable

    Yellow: 12 AWG wire (3.31 mm 2) for 20-amp circuits Orange: 10 AWG wire (5.26 mm 2) for 30-amp circuits Black: 6 or 8 AWG wire (13.3 mm 2 or 8.37 mm 2) for 60- and 45-amp circuits, respectively Grey: usage for underground installations, designated as "underground feeder" (UF) cables [4] The outer jacket is labeled with letters that show how ...

  3. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    The designation NM XX-Y indicates, respectively, the type of sheathing (in this case, non-metallic), the size of the main conductors, and the total number of circuit conductors (exclusive of the grounding conductor). For example, NM 14-2 cable contains three conductors (two plus one ground) at 14 gauge, a size typically used for circuits ...

  4. American wire gauge - Wikipedia

    en.wikipedia.org/wiki/American_wire_gauge

    Consecutive AWG wire sizes thicker than No. 1 wire are designated by the number of zeros: No. 0, often written 1/0 and referred to as "one aught" wire; No. 00, often written 2/0 and referred to as "two aught" wire; No. 000, often written 3/0 and referred to as "three aught" wire; and so on.

  5. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    For instance, instead of 14 AWG (American wire gauge) copper wire, aluminium wiring would need to be 12 AWG on a typical 15 ampere lighting circuit, though local building codes vary. Solid aluminium conductors were originally made in the 1960s from a utility-grade aluminium alloy that had undesirable properties for a building wire, and were ...

  6. Electrical wiring in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_the...

    2-wire earthed DC power circuit ... This fuse will typically be rated either 60, 80 or 100 amps. ... Double face plates for BS 4662 boxes measure 147 mm × 86 mm and ...

  7. Earth-return telegraph - Wikipedia

    en.wikipedia.org/wiki/Earth-return_telegraph

    For the ground circuit to have a conductance as good as the conductor it replaces, the surface area of the plate is made larger than the cross-sectional area of the conductor by the same factor as the resistivity of the ground exceeds the resistivity of copper, or whatever other metal is being used for the wire. [4]

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