Site Wiring Guidelines
EMI Considerations
When wires are run for any significant distance in an electromagnetic field, interference can occur between the electromagnetic field and the signals on the wires. Be aware of the following points:
•Bad site wiring practices can result in the emanation of radio frequency interference (RFI) within the site.
•Strong EMI, especially that caused by lightning or radio transmitters, can destroy the signal drivers and receivers in the router. EMI can even create an electrical hazard by conducting power surges through lines into equipment.
Note To predict and remedy strong EMI, you might need to consult an RFI expert.
If you use
If wires exceed recommended distances, or if wires pass between buildings, give special consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse (EMP) caused by lightning or other
Most data centers cannot resolve the infrequent, but potentially catastrophic, problems described above without pulse meters and other special equipment. Such problems are difficult to identify and resolve, so take precautions by providing a properly grounded and shielded environment, paying special attention to issues regarding electrical surge suppression.