Cabling Requirements; Mains Wiring; Field Wiring; Testing Of Field Wiring - C-TEC CAST ZFP Installation, Maintenance & Operating Manual

CAST ZFP Analogue Addressable Fire Alarm Panel

4 CABLING REQUIREMENTS

All installation wiring must be checked and tested before termination at the panel. Always isolate the
panel's mains and battery backup supplies before cable termination at the panel.
4.1

Mains Wiring

Mains wiring must be installed in accordance with all applicable national, regional or local standards. In the
UK this is BS 7671 IET Wiring Regulations and BS 5839-1, Fire detection and alarm systems for buildings: Code
of practice for system design, installation and maintenance.
Mains wiring should be fire resistant and segregated from extra low voltage field wiring.
The general requirement for the 230V, 50Hz mains supply to the CAST ZFP panel is fixed wiring, using 3 core
2
cable (no less than 1mm
switched fused spur, fused at 3A or a 6A Type B circuit breaker to IEC/EN 60898-1.
The mains supply MUST be exclusive to the panel and be reliably earthed at the indicated earthing post
As an alternative to a switched fused spur, a double-pole isolating switch (S), with 3mm air gaps on the contacts
& switching L & N only, may be used in the mains feed from the Main Distribution Board (A) to the Panel
(C), providing it meets the appropriate wiring regulations (see drawing below).
Hint! C-TEC's Fire Alarm Control
Panel Mains Keyswitch (Part No.
BF319) is a lockable, double-pole
keyswitch that provides secure
switching of mains supply to a fire
alarm panel (The
available @ www.c-tec.com).
4.2

Field Wiring

Separated or Safety Extra-Low Voltage (SELV) field wiring includes loop circuits, sounder circuits and
auxiliary inputs/outputs. SELV field wiring must be installed in accordance with the relevant national, regional
or local regulations (in the UK this is the IET Wiring Regulations BS 7671 and BS 5839 Part 1).
Fire resistant, screened cable should be used throughout the installation. This not only shields the data moving
up and down the cables from outside interference but is essential to ensure compliance with EMC regulations.
All screens must only be terminated to the earth bar provided in the panel's back box.
Screened cables such as FP 200™, Firetuff™, Firecel™ and MICC may be acceptable provided they meet
national standards / the system specification as applicable. Consult Clause 26 of BS 5839 Part 1 for more
detailed information on cables, wiring and other interconnections.
4.3

Testing of Field Wiring

Check the continuity of the loops (including screens), loop earth faults, loop crossover faults, the resistance of the
conventional sounder circuits and all other field wiring as appropriate to ensure they are free from faults.
Note: Only the continuity on the negative (-ve) line of the device loop can be tested to ensure it is fault free. Loop
isolators are in the positive (+ve) line, therefore continuity cannot be tested.
DO NOT test wiring with an insulation tester (Megger) with any electronic equipment connected as the
500V test will destroy these devices and invalidate the warranty.
Page 11 of 60  Approved Document No. DFU5030000 Rev 4  Installation and Programming Manual
and no more than 2.5mm
BF319 is
2
), or a suitable three conductor system fed from an isolating
.