GE Security Legend IP, Руководство по установке

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Legend IP
Installation Manual
10
Cable management
Follow all local codes for cable management. As a general rule, you can fill a cable conduit to a maximum of
60% of its capacity. You must maintain 40% free space. A variety of factors will determine how many cables
you can run into the dome. Capacity limitations include:
• number of cables
• size of the cables
• number of alarms and relays wired
• use of single-conductor or multiple-conductor cable
• use or lack of use of a junction box
Figure 4 provides an illustration of the cable capacity of three typical applications. It is important to note that
all cables of the same gauge are not of the same diameter. Manufacturer, shielding, and rating affect the actual
diameter of cables of the same gauge. GE leaves the selection of the appropriate cable to the discretion of the
installer who is working with the local codes of the installation site.
Figure 4. Three acceptable typical cabling scenarios
3/4in. dia.
Power
Ethernet
Data
(daisy chained)
Data
(daisy chained)
Alarms
(multiconductor)
Video
Alarms (4)
Relays (2)
3/4in. dia.
Power
Ethernet
Data
(daisy chained)
Data
(daisy chained)
Video
Ethernet
3/4in. dia.
Power
Percentage conduit fill = 16%
Includes:
• Ethernet: CAT-5 (0.16 in. dia.)
• Power: one 18 AWG UTP (0.21 in. dia.)
• Alarms: none
• Relays: none
• Video: no analog video cable
• Data: no analog data cable
Percentage conduit fill = 38%
Includes:
• Ethernet: CAT-5 (0.16 in. dia.)
• Power: one 16 AWG UTP (0.25 in. dia.)
• Alarms: none
• Relays: none
• Video: one 59U/6U coaxial (0.24 in. dia.)
• Data: two 22 AWG UTP (0.19 in. dia.)
Percentage conduit fill = 53%
Includes:
• Ethernet: CAT-5 (0.16 in. dia.)
• Power: one 18 AWG UTP (0.21 in. dia.)
• Alarms: 24 AWG UTP (0.11 in. dia.)
• Relays: 24 AWG UTP (0.11 in. dia.)
• Video: one 59U/6U coaxial (0.24 in. dia.)
• Data: one 22 AWG UTP (0.19 in. dia.)
3/4 in. dia. 3/4 in. dia. 3/4 in. dia.
Power
Video
Ethernet
Power
Data
(daisy-chained)
Data
(daisy-chained)
Ethernet
Power
Data
(daisy-chained)
Data
(daisy-chained)
Ethernet
Alarms
(multiconductor)
Alarms (4)
Video
Relays (2)
Note: The diameters for cables of the same gauge will vary per manufacturer, rating, and shielding. So be aware that
you may get more or fewer cables within the 60% conduit fill requirement depending on the cables that you select.