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Topic # 29773 19-Jan-2009 07:41
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I am installing a LAN into my new house and have heard that if network (Cat 5 & 6) cables are laid to close to power cables in walls then there could be interference on the network? 

If so, to what extent do I need to keep cable apart?  Do you suggest I drill separate holes to the power for network cables coming down the walls?  Do power cables effect video/audio (coax) signal the same?



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  Reply # 190494 19-Jan-2009 11:50
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All signal cables should be kept away from power.

I find that 200mm is enough.


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  Reply # 190681 20-Jan-2009 01:19
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I have cat5e going thru the floor/cieling between 2 floors where I could get it in, going around the place, bunched up with lighting cables which are hell for EMR with dimmers, and no problems on the links thru them. Have only done 100 and 1000 meg ethernet, not tried AV over them which may be a bit more revealing of problems. Still get good rates thru them.


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  Reply # 190690 20-Jan-2009 07:51
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The rules say for safety a minimum seperation of SELV/ELV(<50V) and LV(<1KV) is 50mm, however it is recommended (for the mitigation of interference) that telecommunication cables are run 300mm away. It is also recommended (in the standards) that if its not possible to seperate more than 300mm then efforts are made to reduce the length of close cabling to less than 3m in any run, however 50mm must always be adhered to for safety, this is mandatory in the cabling regs.


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  Reply # 190697 20-Jan-2009 08:23
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Great thanks

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