or damage. Use a grounded ferrous metal conduit for installations in geographical
areas subject to frequent thunderstorm activity. In cases where shielded cables
are used, reduce the effects of lightning by placing the cable runs as close to
ground level as possible.
• Electrical Motors
Motors of various sizes are found in a typical restaurant or hotel site. Us a
grounded ferrous metal conduit when running cabling at distances less than two
feet from motors that are 1/4 horsepower or smaller, or less than six feet from
motors larger than 1/4 horsepower.
• Radio Frequency Interference (RFI)
The probability of RFI varies in accordance with many factors, including transmitter
power, location, construction materials used in the building, and the physical
placement of the power and data transmission cables.
Chapter 26
Mechanical and Electrical Considerations for Cable Installation
26-9
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