Technical Information Power And Control Cables Power Appendixes Guide to the Wiring Regulations Cable management and EMC (Electro-Magnetic Compatibility) صفحه Cable management and EMC (Electro-Magnetic Compatibility)
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EMC cable separation - power, IT, data and control cables General : Firstly it must be stated that the majority of power installations installed to BS 7671 will exhibit no EMC problems between the power system and ‘sensitive’ data type installation. Indeed, it is interesting to note that many data IT installation EMC problems have been discovered to be infringements of BS 7671, particularly poor earthing. In spite of this, the following guidance is recommended where ‘sensitive’ equipment is installed (‘sensitive’ equipment means IT data and communications equipment). Some of the recommendations will have to be balanced against cost and performance. |
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Recommendations - cable separation for sensitive equipment : The following optional solutions may be considered to mitigate the effects of EMC on sensitive equipment: * Separate power transformers ; * Size neutral for unbalanced load and triple harmonic currents ; * Balance loads; * Oversizing the power transformer to lower the source impedance (in extreme cases) |
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| The separation distances given in following Table are for backbone cabling from end to end. However, for horizontal cabling where the fnal circuit length is less than 35 metres no separation is required in the case of screened cabling. | |
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Preferred- Best
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1It is assumed that in case of metallic divider, the design of the cable management system will achieve a screening attenuation related to the material used for the divider. 2 The screened IT cables shall comply with EN 50288 series. |
