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Elliott Electric Supply

Separation from Sources of Interference


Unshielded data cables should not be installed near sources of electromagnetism.
EIA/TIA-569, the cabling pathways standard for data cables, specifies these distances for structured data cabling systems:

Minimum Separation Distance from Power Source at 480V or less

Condition <2kVA 2-5kVA >5kVA
Unshielded power lines or electrical equipment in proximity to open or non-metal pathways 5 in. 12 in. 24 in.
Unshielded power lines or electrical equipment in proximity to grounded metal conduit pathway 2.5 in. 6 in. 12 in.
Power lines enclosed in a grounded metal conduit or equivalent shielding (in proximity to a grounded metal conduit pathway) --- 6 in. 12 in.
Transformers and Electric Motors 40 in. 40 in. 40 in.
Fluorescent lighting 12 in. 12 in. 12 in.