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Cabling standards

In the best of data centre ecosystems, a standards-based structured cabling system will provide functionality and scalability with the maximum available options for current and future equipment.

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Cable plant

Overhead delivery system cable layout:

  • The data hall has a system to support overhead delivery of data connections to the equipment cabinets.
  • Cabinet inter-connects must adhere to structured cable guidelines.
  • There is to be NO direct patching between cabinets: All patch cabling is to be contained within individual cabinets.
  • The data pathways maintain a minimum separation from electrical  power and lighting in accordance with BS7671 17th Edition wiring regulations.

Cabling standards

  • A convenient reference to TIA-942 A standards for Data Centres

Fibre standards

  • Fibre installation must use 50 micron OM2 Single Mode or OM3 / OM4 Multi Mode cable to ISO/IEC11801 standards.
  • All fibre installations should be labelled (see Labelling standards)

Fibre connections

  • Fibre must not exceed required length by more than a meter.

Copper standards

  • Copper jumpers must be minimum CAT6 with booted RJ45 connectors.
  • All copper data cables must be labelled.
  • A selection of labelled Cat6 cables are available in Data Hall 3's Build Room.
  • UTP cabling must not exceed the required length by more than one foot within the cabinet.
  • The maximum length for UTP cables within a cabinet should not need to exceed 3m. See:

Power cords (cables)

  • Use cords of minimum length – DH3 uses MCBs that are slower to trip; consequently, there is a greater chance of electrocution.
  • It is assumed that systems will have redundant power supplies. These redundant power supplies must have their power cords plugged into separate power strips.
  • Colour co-ordinate cords to power strips: Supply A – black, Supply B – blue.
  • Use labelled power cords.
  • Power cords must be segregated from data cables as much as practicable.
  • Power cords must be factory certified.

C13 (F) / C14 (M)

  • The C13 connector and C14 inlet are commonly found on computers, servers, routers, and switches. Power cord sets utilizing a C13 connector and a C14 plug are commonplace in data centres to provide power from a RPDU (Rack Power Distribution Device / Power Strip) to a server.

C13 C14

            • Available in black and blue
            • Available in 0.5m, 1m, 1.5m, 2m

C15 (F) / C16 (M)

  • Similar in form to the C13/C14 coupler, except with a ridge opposite the earth in the C16 inlet (preventing a C13 fitting), and a corresponding valley in the C15 connector (that doesn't prevent it fitting a C14 inlet).
  • The C15/C16 is temperature rated for 120 °C, rather than the 70 °C of the similar C13/C14 combination.

C15 C16

  • Available in black and blue

C19 (F) / C20 (M)

  • This coupler is used for some IT applications where higher currents are required, for example, on high-power workstations and servers, uninterruptible power supplies, power distribution units, large network routers, switches, blade enclosures, and similar equipment.

C19 C20

            • Available in black and blue
            • Available in 1m, 2m in blue
            • Available in 2.5m in black

C19 (F) / C14 (M)

  • C14 to C19 power cord transforms a C20 plug into a C14 plug for connecting to a C13 outlet on a power strip or rack-mounted UPS system.
  • It is used for powering computers, servers and other network devices

            • Available in black only
            • Available in 1m, 2m
            • Limited stock available

C5 Clover Leaf (F) / C14 (M)

  • IEC Plug C14 to Cloverleaf Plug C5 Converter Adapter Cable
  • Converts a standard C14 to a C5 connector, ideal for changing an IEC connection into a male cloverleaf plug C14 IEC Socket C5 Cloverleaf Male Plug
  • Rated up to 2.5A 250V

            • Available in black only
            • Available in 2m only
            • Limited stock available

For more on power cords, see:

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