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The 20-pair colour code is a colour code used in Australia to identify individual conductors in a kind of electrical telecommunication wiring for indoor use, known as twisted pair cables. The colours are applied to the insulation that covers each conductor. The first colour is chosen from one group of five colours.
Australia's standard plug/socket system was originally codified as standard C112 (floated provisionally in 1937, and adopted as a formal standard in 1938). The Australian standard of 1937 was the result of a "gentlemen's agreement", reportedly from 1930, between manufacturers Fred Cook of Ring-Grip, Geoffrey Gerard of Gerard Industries and ...
Pages in category "Color codes" ... 0–9. 20-pair colour code (Australia) 25-pair color code; A. ... Color coding of electrical wiring; Electronic color code;
Chuq, this page is about the 25 pair colour code and is correct for Australia as per Appendix B at [S008:2006 (as at April 2006), what you have lsited above is also correct for 20 pair colour code. There are also listed there 2 pair (quad), 3 pair telephone cable colour codes, 1 - 5 pair cable colour codes, 10 pair, and optical fibre colour codes.
Electrical wiring practices developed in parallel in many countries in the late 19th and early 20th centuries. [7] As a result, national and regional variations developed and remain in effect. (see National Electrical Code, electrical wiring, electrical wiring in the United Kingdom). Some of these are retained for technical reasons, since the ...
Colour code [8] voltage range 20–25 V 40–50 V 100–130 V 200–250 V 300–480 V 500–1000 V common color violet white yellow blue red black common application 24 V single-phase AC/DC power single-phase AC/DC power 125 V single-/split-phase AC power 250 V single-/split-phase AC power 400 V 3-phase AC power 500 V on marine vessels
The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: 0 = Black; 1 = Brown; 2 = Red; 3 = Orange;
The first rubber-insulated cables for US building wiring were introduced in 1922 with US patent 1458803, Burley, Harry & Rooney, Henry, "Insulated electric wire", issued 1923-06-12, assigned to Boston Insulated Wire and Cable . These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each ...