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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. D202-00-001-IS Issue 1 25-04-2022 Sheet 5 of 7
capacitance of 6.33pF according to EN/IEC60079-0, clause
7.5.
Caution do not change factory applied finishes
NEC / CEC Installations:
The equipment must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards:
The installation of the units must also be in accordance with
any local codes that may apply and should only be carried
out by a competent electrical engineer who has the
necessary training.
The equipment must not be installed with any obstruction to
the flanged flameproof joint any closer than permitted as per
the NEC/CEC.
For high ambient temperatures the cable entry temperature
may 60ºC or the cable branching point temperature
may exceed 60ºC and therefore suitable heat resisting cables
and cable glands must be used, with a rated service
temperature of at least the values stated below:
For Single Switch model GNExCP7-BG-S:
Max.
ambient
temperature
ºC
35 40 45 50 55 60 65 70
req. Cable /
Cable
Gland
rating: ºC
61 66 71 76 81 86 91 96
For Dual Switch model GNExCP7-BG-D:
Max.
ambient
temperature
ºC
20 25 30 35 40 45 50 55 60 65 70
req. Cable /
Cable
Gland
rating: ºC
60 65 70 75 80 85 90 95 100 105 110
For use in Class I Division II locations, in order to maintain
the db type protection, flameproof conduit seals and/or cable
glands must be used.
The cable gland entries have an M20 x 1.5 entry thread. Only
suitably rated and certified cable glands which must be
suitable for the type of cable being used and also meet the
requirements of the current Ex ‘db’ and Ex ‘tb’ flameproof and
NEC/CEC installation standards (tightening torque 10Nm).
When only one cable entry is used the other entries must be
closed with suitably rated and certified blanking plugs that
meet the requirements of the current Ex ‘db’ and Ex ‘tb’
flameproof and NEC/CEC installation standards (tightening
torque 10Nm).
All Installations:
To access the Ex d chamber, remove the four off M6 x 60
stainless steel A4-70 Cap Head cover bolts.
If the installation is made using conduit, openings must have
a sealing fitting connected as close as practical to the wall of
the enclosure, but in no case more than the size of the
conduit or 2” of enclosure, whichever is the lesser.
Electrical connections are to be made into the PCB / terminal
blocks / DIN rail provided.
Internal earthing connections should be made to the Internal
Earth terminal on the PCBA. The earth conductor should be
at least equal in size and rating to the incoming power
conductors.
On completion of the installation the flameproof joint surfaces
should be inspected to ensure that they are clean and that
they have not been damaged during installation. Flamepaths
are not intended to be repaired.
When fitting the flameproof cover ensure the cover is sitting
flat and correctly positioned on the base. Insert the M6 x 60
stainless steel A4-70 Cap Head cover bolts and fully tighten
down (tightening torque 3.5Nm), ensuring no gap is visible
between the cover and base of the enclosure.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.
The enclosure is non-conducting and may generate an
ignition-capable level of electrostatic charges under certain
extreme conditions. The user should ensure that the
equipment is not installed in a location where it may be
subjected to external conditions that might cause a build-up
of electrostatic charges on non-conducting surfaces.
The M12 Cap fitted to the top side of the unit is not a user
serviceable part and must not be removed during installation
and maintenance.
The GNExCP7 Call Point range can be supplied with the
following types of adapters:
M20 to ½” NPT
M20 to ¾” NPT
M20 to M25
It is important to note that stopping plugs cannot be fitted
onto adapters, only directly onto the M20 entries.
Any other adapters used must be suitably rated and ATEX /
IECEx / UKEx or NEC/CEC certified adapters.
12) Cable & Wiring Connections
Wiring methods shall be in accordance with CSA C22.1,
Canadian Electrical Code, Part I, Safety Standard for
Electrical Installations, Section 32; and CAN/ULC-S524,
Standard for Installation of Fire Alarm Systems.
The units come with two options for the terminal block.
A DIN rail version which has 8-way connection and allows for
limited wiring of EOL devices, or a 6 Way terminal block.
The PCB Terminal Version has a 6-way connector but is
designed to allow for full configuration with Series and EOL
devices in a number of wiring configurations.
For full wiring details see wiring diagrams D202-06-211
For EOL and Series device limitations and configurations see
Section 15. Fitting can be requested by E2S at the order
