European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D156-00-621-IS
Issue 1
27-10-22
Sheet 4 of 15
6.2. Access to the Flameproof Enclosure
In order to connect the electrical supply cables to the beacon
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To access the Ex d chamber,
loosen the M4 grub screw on the beacon cover. Open the
enclosure by turning the beacon cover counterclockwise and
remove the cover, taking extreme care not to damage the
flameproof threads in the process (see figure 3).
Figure 3: Accessing the Explosion Proof Enclosure.
On completion of the installation the flameproof threaded joint
should be inspected to ensure that they are clean and that
they have not been damaged during installation.
Flameproof threaded joints are not intended to be repaired.
Ensure that the
‘O’ ri
ng seal is in place and undamaged.
When fitting the flameproof cover ensure the thread is
engaged correctly. Fully tighten the cover all the way, ensure
no gap is visible between the cover and base of the beacon
enclosure. Tighten the M4 grub screw.
7) Installation Requirements
7.1. Installation Standards Compliance
Attention: Disconnect from power
source before installation or service
to prevent electric shock.
The beacons must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards.
ATEX / IECEx & UKEx installation standards
EN60079-14 / IEC60079-14: Explosive atmospheres -
Electrical installations design, selection and erection.
EN60079-10-1 / IEC60079-10-1: Explosive atmospheres
- Classification of areas. Explosive gas atmospheres.
EN60079-10-2 / IEC60079-10-2: Explosive atmospheres
- Classification of areas. Explosive dust atmospheres.
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.
NEC / CEC Installation Standards
Cautions
Attention: Installation must be carried out by an
electrician in compliance with the National Electrical
Code, NFPA 70 or CSA 22.1 Canadian Electrical Code,
Part I, Safety Standard for Electrical Installations,
Section 32. / L'installation doit exclusivement être
réalisée par du personnel qualifié, conformément au
code national d'électricité américain, NFPA 70 ou CSA
22.1 Code canadien de l'électricité, première partie,
norme de sécurité relative aux installations électriques,
Section 32.
Attention: Disconnect from power source before
installation or service to prevent electric shock /
Débranchez-le de la source d'alimentation avant
l'installation ou l'entretien pour éviter tout choc
électrique.
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.
7.2. Cable Selection and Connections
When selecting the cable size, consideration must be given
to the input current that each unit draws (see table 1), the
number of beacons on the line and the length of the cable
runs. The cable size selected must have the necessary
capacity to provide the input current to all of the beacons
connected to the line.
Electrical connections are to be made into the terminal blocks
on the PCBA, using solid wire 0.5-4mm2 / AWG 20-12 or
stranded wire, sizes 0.5-2.5mm2 / AWG 24-14. Wire
insulation needs to be stripped 8mm. Wires may be fitted
securely with crimped ferrules.
Figure 4: Wire Preparation.
Terminal screws need to be tightened down with a tightening
torque of 0.45 Nm / 5 Lb-in. A 4-way terminal block is
provided on the DC Beacon: 2-off +ve and 2-off -ve terminals.
See schematic diagram D191-06-621.