P/N PM000223A • Rev. 1 • ISS 9 August 2017
10
Installation Manual
NU-Series Hardware
System Cabling
2.2.4 Pulling Cable and Wire
After all conduit has been installed and secured to the electrical boxes, pull the cables and
wires through the conduit in accordance with the installation drawings. Make sure to pull
15cm (6in.) of free cable from the backbox at every location where the modules are to be
installed.
Use caution not to strain the connectors. If the cables are too stiff to fit in the backbox,
remove up to 15cm (6in.) of cable jacketing before connecting the cable to the module, as
shown below.
2.2.5 Labeling Cable and Wire
Label cable and wire terminations so that they can be identified easily when connecting to
system devices. Typically, each dome light will have several Cat 5/5e/6/7 cables. Refer to
the relevant module description in the following sections for details of the electrical
connections. Be sure to pay attention to the colors that differentiate the hallway and room
bus cables.
2.3
Preparing the Room Bus Cables
It is important to prepare the cables appropriately and to guide the wires inside a module’s
housing in order to avoid the wires pressing on the printed circuit board, which could
result in damage and also prevent the top section from closing properly.
2.4
Terminating Cables
2.4.1 Terminating Cat 5/5e/6/7 Connectors
Use a Cat 5/5e/6/7 U/UTP cable when connecting modules to the room bus. Handle
Cat 5/5e/6/7 cables with care. Do not splice, sharply bend, strip leads, or untwist wire that
terminate at RJ-45 connectors. Any of these actions can degrade or ruin the system’s
network operation.
Cat 5/5e/6/7 cables used in the system terminate with an RJ-45 connectors to the T568B
or EIA 568B straight-through connection standard as shown in the following table.
