Ametek Teseq CDN 3153-S63, User Manual, Page: 18 / 43

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9.2.4 Color codes of a 3-phase system
Conductors of a three phase-system are usually identified by a color code, to allow for
balanced loading and to assure the correct phase rotation. Colors used may adhere to
International Standard IEC 60446, older standards, or to no standard at all, and may vary
even within a single installation. For example, in the U.S. and Canada, different color codes
are used for grounded (earthed) and ungrounded systems.
Countries /
5 wire power cord L1 L2 L3 Neutral Ground /
protective earth
United States (common
practice) Black Red Blue White or
gray Green, green/yellow
tripped or a bare
copper wire
United States (alternative
practice) Brown Orange
(Delta) or
Violet (Wye) Yellow Gray or
White Green
Canada (mandatory) Red Black Yellow White Green (or bare
copper)
Canada (isolated 3-phase
installations) Orange Brown Yellow White Green
Europe and many other
countries, including UK
from April 2004 (IEC 60446),
Hong Kong from July 2007
Brown Black Grey Blue Green/yellow striped
Older European
(IEC 60446, varies by country)
Black or
Brown Black or
Brown Black or
Brown Blue Green/yellow striped
UK until April 2006,
Hong Kong
until April 2009
,
South Africa, Malaysia
Red Yellow Blue Black Green/Yellow striped
(green on installations
approx. before 1970)
Pakistan Red Yellow Blue Black Green
India Red Yellow Blue Black Green
Australia and New Zealand
(per AS/NZS 3000:2000 section 3.8.1)
Red White (prev.
yellow) Blue Black Green/yellow striped
(green on very old installations)
People
’s Republic of China
(per GB 50303-2002 Section 15.2.2)
Yellow Green Red Light Blue Green/yellow striped
Peak impulse voltages of up to 2250 V can occur on these power lines. Such voltages can,
under certain circumstances, destroy AC/DC power supplies. It is the user
’s responsibility to
ensure adequate protection being provided at the inputs of the source.