Ziton ZP3, Руководство по установке и обслуживанию

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Appendix A: ZP wiring guide
ZP3 Fire Control Panel Installation, Commissioning, and Maintenance Manual 125
1. Shielding includes cable with copper screens, Mylar covered, or Pyrotenax
cable (MICC).
2. Shielded cable may be two-core or multiple-core.
3. Only Z-Address lines may be run inside a screen, in order to qualify as
shielded.
4. Where four-core shielded cables are used, two cores can be used for the
Z-Address Line, and the other two cores used for either ZP approved
sounders, or ZP system DC control circuits.
5. Where multiple-core cable is used, it must only be used for the ZP fire
detection system devices, attached to the same control panel. Third party
cabling should not be run inside the same shield as the fire detection cable.
Examples are public address and intercom systems. Third party cabling
includes connections between ZP interface units and relays, etc. of other
systems.
6. The shielding must be connected through at each sensor, line device, or
connection, and must be continuous through the complete length of cable.
The connection must be by means of a terminal.
7. Z-Address line must be separated from high voltage cables by at least
300-mm as per BS 5839 Part 1.
8. Continuity of conduit, Pyrotenax, or shielding must be as per BS specification
BS 5839 Part 1 (paragraph 24.5), and the
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(BS 7671).
9. Insulated screened cable must be isolated from building earth except for
connection at the panel.
For Pyrotenax cable (MICC), which can pick up coincidental earths at junction
boxes, the building system must have an effective earth bond between the parts
of a building or buildings where the system is to be installed. The building earth
bond must be sufficient to prevent the fire system from acting as an earth strap
between the different parts of a building or buildings.
Figure 62 and Figure 63 show the correct methods for using shielded cable.
The cable shield must be continuous, and must be connected through at
detectors, or devices, or at connections. Some detectors have provision for the
shield connection, but in those without, a connector should be used to join the
shield.
• Shields must be connected with a screw connector at each termination.
• Earth continuity must be checked.
• The addressable line outgoing and return loop must both be earthed.