INM 9370-RD Rev 5
7
a) All the necessary gland holes have been prepared in the enclosure. One has
a breather fitted and the others are fitted with appropriate blanking plugs.
Where the blanking plugs are replaced by cable gland, the fitted glands must
be Ex e certified and have an ingress protection (IP) rating that maintains the
overall rating of the enclosure.
b) All cable gland holes must be fitted with either a suitable cable gland or
blanking plug.
CAUTION
It is not permitted to create additional holes in the enclosure as this would violate
the certification.
3.2 Preparation
a) Remove any temporary protection or packing materials.
b) The enclosure can be mounted on any suitable structure using the
enclosure’s integral mounting brackets.
c) The fixing bolts must be suitable for the mounting surface and the
environmental conditions.
d) Prepare holes in the mounting surface, on the centres shown in Figure 3.1 or
3.2, to accept suitable screws/bolts for mounting.
e) It is advisable before mounting, to do any necessary replacement of the
cable entry blanking plugs with a suitable gland. For further details see
Section 3.1 f) & g).
3.3 Mounting
WARNING!
To minimise the risk of ignition by electrical apparatus in hazardous
areas, efficient installation, inspection and maintenance of apparatus
and systems is essential, and the work should be carried out by suitably
trained personnel in accordance with the prevailing code of practice.
The certification documents specify “Conditions for safe use” that
must be adhered to and the copy certificate supplied should be
studied and understood. Additionally it is recommend that a working
knowledge of IEC EN 60079 -14 be attained, as this standard provides
guidance in respect to the installation of electrical equipment in
hazardous areas.
3.3.1 The SS enclosure
It is suggested that the upper two fixing bolts have washers fitted before
screwing them into prepared holes to a depth that will allow the enclosure to be
safely hung on them. The enclosure can then be supported on these top bolts
while the lower fixings are put in place. Finally, all fixings can be tightened to
the torque level recommended by their manufacturer.
3.3.2 The GRP enclosure
It is recommended that a washer, not exceeding the 12mm diameter specified in
Figures 3.1 and 3.2, is placed under the head of each of the bolts used to fix the
enclosure to its mounting surface.
NOTE!
It is important to recognise that the hole centres for the
middle
fixings on the GRP
enclosure are NOT aligned with the holes for the
end
fixings.
Study Figure 3.2 for full details.
It is suggested that the lower fixings should be put in place first, so that the
enclosure can be supported by them while the upper fixings are put in place.
