|
Question : Cat5 cable run near a 220v power line
|
|
Can you run a cat5 cable (non-shielded) within 6-8 inches of a 220v line without worry of interference from the power line run? If not, what distance would be needed to assure a problem free run? Thanks Al
|
Answer : Cat5 cable run near a 220v power line
|
|
Northern Telecom IBDN User Manual contains an Appendix D titled _UTP Separation Guidelines From EMI Sources_. The values are the same as the cabling pathways standard, EIA-569, table 4.8-5.
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. (12.7 cm) (30.5 cm) (61 cm) Unshielded power lines or electrical equipment in proximity to grounded metal conduit pathway 2.5 in. 6 in. 12 in. (6.4 cm) (15.2 cm) (30.5 cm) Power lines enclosed in a grounded metal conduit (or equivalent shielding) in proximity to grounded metal conduit pathway - 6 in. 12 in. - (15.2 cm) (30.5 cm)
Transformers & electric motors <------- 40-in (1.02 m) ----->
Fluorescent lighting <------- 12-in (30.5 cm) ---->
Source: Integrated Building Distribution Network (IBDN) User Manual - Northern Telecom, doc # IBDN-UM-9105, 1991.
The EIA/TIA working group revising the EIA-569 standard is using the results of field and lab tests to update the recommendations. The target date for completion is Dec 1995.
|
|
|
|