nVent.com/RAYCHEM
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19
ENGLISH
Installation of the gland in the enclosure.
Conditions for threaded and unthreaded holes
Threaded Holes Unthreaded (through) holes
Tolerance Class
(6H) is required for Ex d and
recommended for Ex e is max
6G/6H. Ref. ISO 965-1 and
ISO 965-3.
Nominal thread size
M25 –0,0 mm/ +0,7 mm (M).
Enclosure Material
Limitations
Brass glands should not be
installed in zinc or aluminium
enclosures outdoor or in humid
environments.
Brass glands should not be
installed in zinc or aluminium
enclosures outdoor or in humid
environments.
Enclosure interface
sealing method
If the sealing surfaces are
uneven, use PTFE washer
NFWM25 or the green fiber
washer GFWM25 (washers to be
ordered separately).
If the sealing surfaces are
uneven, use PTFE washer
NFWM25 or the green fiber
washer GFWM25 (Washers to be
ordered separately).
Maximum surface
roughness of the
enclosure wall
Ra 6,4µm, better than 3,2µm is
recommended.
Ra 6,4µm, better than 3,2µm is
recommended.
Thickness range
for the enclosure
wall (t)
≥ 4 mm. For Ex db applications
a minimum of 5 fully engaged
threads is required. The thread
will maintain an IP rating of IP64.
A sealing washer shall be used to
maintain all IP ratings ≥ IP64.
Minimum wall thickness:
Plastic boxes ≥ 2 mm
Metal boxes ≥ 1 mm but less
than the thread length of the
cable gland + the thickness of
the locknut.
Perpendicularity
+/–1° or 0,2 mm at the outer
edge of the gland, whichever is
smaller.
+/–1° or 0,2 mm at the outer
edge of the gland, whichever is
smaller.
Permitted use and
location of any
earth tags
Earth tags should be installed
on the inside of the enclosure.
Thickness of tag and lock nut to
be considered when determining
the min/max wall thickness of
the box.
Earth tags should be installed
on the inside of the enclosure.
Thickness of tag and lock nut to
be considered when determining
the min/max wall thickness of
the box.
For chamfered
holes
The outermost edge must not
have a greater diameter than the
center of the washer.
The outermost edge must not
have a greater diameter than the
center of the washer.
Lock nuts
Only use nVent RAYCHEM
locknuts or other types
recommended by the
manufacturer.
Only use nVent RAYCHEM
locknuts or other types
recommended by the
manufacturer.
Any thread sealant should be non-hardening.
It is the users/installers responsibility to ensure that the interface
between the enclosure and cable gland is suitably sealed for the required
application.
If required an anti-seize lubricant then ensure no lubricant comes into
contact with the cable gland seals as this may impair performance.
DE, FR, RU: Page 23-25