Английская Википедия:IEC 60446
Шаблон:Short description Шаблон:1rШаблон:Use British (Oxford) English The international standard IEC 60446 Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors was a standard published by the International Electrotechnical Commission (IEC) that defined basic safety principles for identifying electrical conductors by colours or numerals, for example in electricity distribution wiring. The standard has been withdrawn; the fourth edition (IEC 60446:2007) was merged in 2010 into the fifth edition of IEC 60445 along with the fourth edition, IEC 60445:2006.
Permitted colours
The standard permits the following colours for identifying conductors:
- black, brown, red, orange, yellow, green, blue, violet, grey, white, pink, and turquoise.
(The colours green and yellow on their own are only permitted where confusion with the colouring of the green/yellow protective conductor is unlikely. Combinations of the above colours are permitted, but green and yellow should not be used in any of these combinations other than as green/yellow for the protective conductor.)
Use of colours
Neutral or mid-point conductor
If a circuit includes a neutral or midpoint conductor, then it should be identified by a Файл:Color wire light blue.svg blue colour (preferably light blue). Light blue is the color used to identify intrinsically safe conductors, and must not be used for any other type of conductor.
AC phase conductors
The preferred colours for AC phase conductors are:
- L1: Файл:Color wire brown.svg brown
- L2: Файл:Color wire black.svg black
- L3: Файл:Color wire grey.svg grey
For a single AC phase: Файл:Color wire brown.svg brown[1]
Protective conductor
The colour combination Файл:Color wire green yellow.svg green/yellow is always and exclusively used to identify the protective conductor. On any 15 mm length of the conductor, one of these two colours should cover between 30% and 70% of the area and the other the remaining area.
Protective earth and neutral (PEN) conductor
Insulated PEN conductors (combined protective earth + neutral in TN–C systems) should be marked:
- either Файл:Color wire green yellow.svg green/yellow along their entire length with light blue markings at their ends,
- or Файл:Color wire light blue.svg light blue along their entire length with green/yellow markings at the ends.
The cable must have a cross section of 16 mmШаблон:Sup (5 AWG) or greater.
United States, Canada and Japan
The three countries United States, Canada and Japan are mentioned in a note in the standard for using different colours:
- Файл:Color wire white.svg white or Файл:Color wire gray.svg natural gray for mid-wire or neutral conductor (instead of Файл:Color wire light blue.svg light blue)
- Файл:Color wire green.svg green for the protective conductor (instead of Файл:Color wire green yellow.svg green/yellow)
United Kingdom
British Standard BS 7671:2001 Amendment No 2:2004 adopted the IEC 60446 colours for fixed wiring in the United Kingdom [1], with the extension that Файл:Color wire gray.svg grey can also be used for line conductors, such that three colours are available for three-phase installations. This extension is expected to be adopted across Europe and may even find its way into a future revision of IEC 60446.
Marking
Where conductors are in addition identified by letters and numbers, then:
- letters to be used come from Latin character set,
- numbers must be written in Arabic numerals, digits 6 and 9 must be underlined (Шаблон:Underline and Шаблон:Underline),
- and a few symbols like + and − can be used.
Green-and-yellow conductors must not be marked.
Examples: L1, L2, L3, N, L+, L−, M, 35, 1Шаблон:Underline
References
External links
- IEC 60446:2007: Basic and safety principles for man-machine interface, marking and identification – Identification of conductors by colours or numerals, International Electrotechnical Commission, Geneva.
- IEC 60445:2010: Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors, International Electrotechnical Commission, Geneva.
- Paul Cook: Harmonised colours and alphanumeric marking. IEE Wiring Matters, Spring 2006.
- Шаблон:IEC
