Separation from Sources of Interference by Brandy McNeilin Datacomm TablesFebruary 27, 2017 Unshielded data cables should not be installed near sources of electromagnetism. There is a standard that specifies these distances for structured data cabling systems. EIA/TIA-569, the cabling pathways standard, specifies the following 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 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.