Site Electrical Wiring Guidelines
Table 1 describes the factors you must consider while planning the
electrical wiring at your site.
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Caution:
It is particularly important to provide a properly
grounded and shielded environment and to use electrical surge-suppression
devices.
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Table 1: Site Electrical Wiring Guidelines
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Site Wiring Factor
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Guidelines
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Signaling limitations
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If your site experiences any of the following
problems, consult experts in electrical surge suppression and shielding:
- Improperly installed wires cause radio frequency interference
(RFI).
- Damage from lightning strikes occurs when wires exceed
recommended distances or pass between buildings.
- Electromagnetic pulses (EMPs) caused by lightning damages
unshielded conductors and electronic devices.
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Radio frequency interference
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To reduce or eliminate radio frequency interference
(RFI) from your site wiring, do the following:
- Use twisted-pair cable with a good distribution of grounding
conductors.
- If you must exceed the recommended distances, use a high-quality
twisted-pair cable with one ground conductor for each data signal
when applicable.
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Electromagnetic compatibility
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If your site is susceptible to problems with electromagnetic
compatibility (EMC), particularly from lightning or radio transmitters,
seek expert advice.
Some of the problems caused by strong sources of
electromagnetic interference (EMI) are:
- Destruction of the signal drivers and receivers in the
switch.
- Electrical hazards as a result of power surges conducted
over the lines into the equipment.
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