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Breakdown of Materials for Hypothetical Job
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"I
am starting a new job tomorrow putting in structured (cat 5e & 6)
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Carl W.
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This
is a breakdown of the materials needed for our hypothetical installation.
The job is for 30 double voice/data outlets.
First
we need a cabinet. The size of this depends upon the amount of
space required for patch panels, hubs, the customers equipment,
and how much room the customer has. Cabinets come in a range of
sizes measured in 'Units' or 'U', one 'U' is about 1.7 inches
or 44.54mm. In our hypothetical installation the cabinet will
need to house:
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2
x 32 way patch panels to terminate the 60 cables @ 2U each = 4U
So a 27U cabinet will do nicely. |
6 x boxes of Cat 5e cable - A box of cable is 305m and we need about 1800m
so six boxes would do, but as the cable is fairly inexpensive, buying
eight boxes means we can pull in more cables each time which makes the
installation quicker. It also covers the amount of wastage which would
be expected unless you can cut each cable to exactly the right length
at every outlet.
30 x double Cat 5e outlets and back boxes. Some systems comprise of single outlet modules which clip into single gang or two gang faceplates, in this case 60 modules would be required with 30 single faceplates.
30 x PBX master telephone adapters - In the UK these are used to change the BT style telephone plugs to RJ45's so they can be used on the structured cabling system. Inside the PBX master adapters are the components that you find in a normal BT wall socket, these enable analogue telephones to ring. If the telephone system is digital it may not need these components so we could buy secondary adapters instead. Some customers may have both types of phones so you need to check, also, any external lines will need PSTN master adapters, these are like normal PBX masters but with surge arrestors fitted.
60 x patch leads (30 x 1.5m, 30 x 2m) - 30 for patching the network hubs and 30 for patching in the phones. Various lengths are available and it depends on the cabinet layout to which lengths are bought.
30 x 3m fly leads - these are the same as patch leads and are used to connect from the wall outlets to the PC's. We don't need any for the telephones as they have their own leads.
That
about covers it apart from some trunking, cable ties and a method of labelling
the system.
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