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About mattpatterson

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  1. Scotmod. What part of 7671 are you quoting on this? Previously I have run mains cabling and fire alarm/ELV/data in the same tray but with a divider to separate them. This was agreed by everyone and signed off by the Clients consultant. in the NON-mains side, I was under the impression that the voltages in fire alarm, data and security (Power Over Ethernet - in our case) were so low that they would not cause any interference with each other. This has always been a grey area in 5839. I think a lot of older generations do not agree with running fire alarm and data together!
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