Larson Electronics, LLC
Phone:
877-348-9680
Fax: (903) 498-3364
www.larsonelectronics.com
1.
In accordance with NEC requirements, glands with NPT and Metric entry threads are
suitable for Divisions.
2.
In accordance with CEC requirements, glands with NPT threads are suitable for both
Divisions and Zones. Glands with Metric threads are only suitable for Zones fitted
with an approved Metric to NPT thread conversion adapt
e
r.
3.
For IEC and/or ATEX installations:
a.
All tapes/shields/foils must be removed and any twisted pairs/triples
unwound to form individual conductors.
b.
Drain Wires: Pass sleeving/heat shrink tube over the drain, making sure
it is positioned within the resin Tube/Resin Dam area. If required, shrink
the tube by applying heat, then treat the drain wire as a conductor.
4.
For NEC Class 1 Div 1 and Zone 1 see article 501.15 of the NEC.
5.
The interface between a cable entry device and its associated enclosure / cable entry
will require additional sealing to achieve ingress protection (IP) ratings higher than
IP54. The minimum protection level is IP54 for explosive gas atmospheres and IP6X
for explosive dust atmospheres. Parallel threads (and tapered threads when using a
non-threaded entry) require a sealing washer or integral O-ring face seal (where
available) to maintain IP66. It is the installer’s responsibility to ensure the IP rating is
maintained at the interface.
Note: When fitted to a threaded entry, all tapered threads on
a CGB series
product
will automatically provide an ingress protection rating of IP66.
6.
A
Larson Electronics LLC
earth tag should be used when it is necessary to provide
an earth bond connection.
Larson Electronics LLC e
arth tags have been
independently tested to comply with Category B rating specified in IEC 62444 (there
are no ratings stated in IEC 60079-0). Ratings are shown in the associated table.
Larson Electronics LLC e
arth tags slip over the cable gland or accessory entry thread
from inside/outside the enclosure and must be secured with a locknut (if fitted
internally).
7.
Metric entry threads comply with ISO 965-1 and ISO 965-3 with a 6g tolerance as
required by IEC 60079-1:2014. The
s
tandard metric thread pitch is 1.5mm for threads
up to M75, and 2.0mm from M90 and above. Special thread pitches between 0.7 –
2.0mm are available on all products on request. See certificate for details of other
thread types. NPT threads are in accordance with ASME B1.20.1-2013 gauging to Cl
3.2 for external threads. For details of other thread types refer to IECEx certificate.
8.
Enclosures must be strong enough to support the cable and cable gland assembly.
The enclosure surface finish must be smooth and flat to facilitate sealing with an O-
ring or Entry Thread Sealing Washer for the required IP rating.
9.
Enclosure walls must be sufficiently strong to support the cable and cable gland
assembly. Enclosure entries shall be perpendicular. Any draft angles from the
casting/moulding process should have a perpendicular flat spot machined to facilitate
sealing with an O-ring or Entry Thread Sealing Washer.
10.
It is recommended
that when using the cable gland with a through-hole, the hole
must be circular, free of burrs and the diameter no larger than 0.7mm above the
thread major diameter. A suitable
l
ocknut shall be used to secure the product.
Installation should only be performed by a competent person using the
correct tools. Read all instructions before beginning installation.
INSTALLATION GUIDANCE NOTES
Installation Instructions
3
of
7
CGB-C1D1-MCHL
Series
