[ Technical: FAQs ]
Part 2 Information technology. Cabling installation. Installation planning and practices inside buildings later this year. By taking the following simple steps, you can minimise the heating effects of PoE caused by I2 losses:
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1. Use low power devices (PDs); 2. Use high energy efficient PSUs;
3. Use power sourcing eEquipment (PSE) that has a 57V output; 4. Use four-pair solutions;
5. Use data cables with large conductors (23AWG or better); 6. Keep cable runs as short as possible; 7. Use smaller cable bundles; and 8. Run cables in well ventilated spaces.
Can I use mineral insulated copper clad (MICC) cable for data transmissions? Whilst MICC cable is not specifically designed for data transmission, it is often successfully deployed for data transmission purposes over short distances. Its rugged design and durability often give it advantages over purpose-manufactured data cables. There are no real design guidelines, but advice is often issued by equipment manufacturers that have developed their expertise over a number of years, allowing them to vouch for the cable’s suitability when it is installed to their specifications. There is also no guidance that we are aware of with respect to data rates or maximum usable cable lengths. However, we have never known it to be used for high speed communications in the 100MBps to 10GBps data range. Best results are obtained by using the twisted pair version, as opposed to the multicore version.
My client wants me to install new telephone outlets in their home, but they have got an old style BT connection box on their incoming cable. Can I replace the incoming cable box and fit new telephone boxes throughout his house? The incoming cable is the legal responsibility of the telco – that is, BT, Virgin Media and so on. Therefore, they must be called upon to fit a new box, and they usually charge for this service. Once the new box (usually an NTE 5 Master) is fitted, you can then install NTE slaves in the house. However, be sure to use the correct type of cable or you may get poor quality results. See ITEC Guide to Datacomms Part 008 Installing Domestic Telephone Systems including Cordless, Wireless and PowerLine-based systems.
My client has asked me to make its office network and systems greener. Is there any good guidance on this subject? Yes. See ITEC Guide to Datacomms Part 106 Reducing Your Carbon Footprint by using more Sustainable IT Systems. This gives a range of options for improving IT system ‘greenness’, from ‘no cost’ to system replacement options.
The ECA Technical Services department can provide technical support and guidance to ECA members on any technical issue related to ICT and datacomm installations. Please call 020 7313 4827 for ICT and datacomm-related technical queries. Presentations are also available on this subject for ECA branches. ECA members should approach their ECA regional manager for further details (see page 46 of this issue for contact details).
May 2012 ECA Today 63
SHUTTERSTOCK / ASHARKYU
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