UFC 3-580-10
14 July 2004
Including changes 12 April 2005
Figure 2-3 Typical 1V+1D Wall Plate Configuration
2-6.4
Interference Considerations. Article 800.52 of NFPA 70 states
that communications wires and cables must be separated by at least 51 mm (2.0
in) from conductors of any light, power, Class 1, non-power-limited fire alarm, or
medium power network-powered broadband communications circuits. When
wires are run for any significant distance in an electromagnetic field, interference
can occur between the field and the signals on the wires due to magnetic
induction of the cable. Strong electromagnetic interference, especially when
caused by lightning or radio transmitters, can destroy the signal drivers and
receivers in the server, and can even create an electrical hazard by conducting
power surges through lines and into equipment. NMCI minimum requirements
for cable separation are:
Horizontal wiring must not be run closer than 51 mm (2.0 in) in
parallel with electrical wiring or lighting fixtures.
Horizontal wiring must be placed no closer than 1220 mm (48.0 in)
to electrical transformers
Horizontal wiring must be placed no closer than 200 mm (8.0 in) to
fluorescent lighting ballasts
Horizontal wiring must be placed no closer than 76 mm (3.0 in) to
other horizontal wiring when crossing
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