Siemens 500 NIM - Manual (Page 32)

Network Design Considerations 2-14 SIMATIC TIWAY I Series 500 NIM User Manual
Surface Duct Routing. Surface ducting for network cabling is usually
installed along the baseboards or is attached to walls at desktop height.
While surface ducting protects cables from both physical and EMI effects, it
may also require that network computing devices be positioned near a wall.
Aside from physical obstructions such as posts, walls, and partitions,
electrical interference should also be avoided.
In general, network cabling should never come into direct contact with any
electrical conductor, and if cabling is installed inside a conduit, the conduit
should be grounded in accordance with applicable electrical codes. Keep at
least three feet between all network cabling and the following:
•
Power lines carrying 440 volts or greater
•
Generators
•
Electric motors
•
Transformers
•
Electric welders
•
Induction furnaces and heaters
•
Rectifiers
•
All sources of microwave radiation
•
Fluorescent lighting
•
Teletypes
Obstructions