Ethernet Patch Cable Colour Codes & Bestpractices

Keeping data from getting crossed in a data center can be a pain. Below are some of the standards followed in Data Centers

blue - most common so workstations or generic servers.

red - critical systems. Sometimes used for building fire systems

yellow - less critical system.

orange - cabels that go off to other racks

green - where the money flows for e-commerce systems.

black - VoIP systems since the phones came with blakc patch leads

white - video camera network

pink - used for rs-232 serial cables

purple - used of isdn type links

tan - telephone lines  

This is the current list of colors of ethernet cables that can find be found in general ind DC or have seen:

 

blue

light blue (rare but commonly used on cisco cables)

fluorescent blue (even rarer)

red (many of these are cross over cables)

yellow (this was a standards approved color for cross over cables)

cisco cable yellow

orange

pink

fluorescent pink

green

fluorescent green (never seen this buts its in catalogs)

black (easy to confused with power cords)

white (sort of rare)

light gray

dark gray (rare)

silver (rare)

tan/beige (common in cat 3 patch cables)

purple/violet (they are different but when you order one you get the other)

fluorescent violet (very rare)

 

 

One thing to consider is about 15% of all males are slighly color blind and only about 10% think they are. Many colors look the same but often times a color blind person can easliy tell the difference between say tan cables and beige cables but can't tell the red from the green.

 

 

Color codes for fiber (fibre?)

 

  

Orange - multimode

Yellow- Single mode

gray - could be either but tends to be single mode

light blue - could be either

Color codes for fiber jackets

Blue - Stright cut - fiber joint is perpeneducalr at 90 degrees

Green - Angled cut - fiber joint is angled slightly

 

Note that buildings will often have these colors:

 

 

red - fire alarm cables

white - cheaper fire alarm cables

blue - who knows? Could be alarm, fire, hvac, or data

tan - same as blue but older

 

For -48 volt systems you can get:

 

 

red - ground.

black - negitive 48V but can routinely be -56V

blue - could be the same as red or black but tends to be the same as red on a differenc circut

 

 

Note that -48 Volt systems tend to be able to provide massive amounts of unfused current. These system will often have enough capacity to boil the metal in tools.

 

 

That describes the outer jackets. Inside cables like power you can have:

 

 

Live power from selected places around the world:

 

 

 

red (power Au/UK)

brown (old for AU/NZ/UK)

yellow (old phase 2 UK)

blue (old phase 3 UK)

blue (phase 3 in AU)

blue neutral in Europe

black (power in Europe)

Gray (old IEC phase 3)

gray (power Europe)

gray (neural in US/Japan)

white (neutral in US)

white (pahse 2 in Au)

white (swtich return in AU/UK)

green/yellow - Ground most places

green or yellow but not both (power IEC 60446 and a bad idea)

green (ground in the US according to parts of the Elec code)

green (Never ground in the US according to parts of the Elec code)

bare copper (ground in the US or death)

 

 

The color codes for ships make much more sense and are about as uniform. For example blue is used for compressed air on US registered ships yet blue is for water on UK registered ships.