Approval/Certificate/Document of Conformity
SCHEDULE
EU-TYPE EXAMINATION CERTIFICATE Sira 05ATEX1288X
Issue 5
This certificate and its schedules may only be
reproduced in its entirety and without change
CSA Group Netherlands B.V.
Utrechseweg 310,
6812 AR, Arnhem Netherlands
DQD 544.11 Rev 2018-04-20 Page 6 of 9
The KSB Range of Conduit Stopper Boxes are suitable for use with conductors carried in conduit,
providing a flameproof barrier entry into enclosures and as a line bushing for terminating flying leads;
they comprise:
a threaded entry body to tighten into an associated enclosure, this is fitted with a silicone O-ring and
internally coated with a release agent
a ferrule, fitted with an external nitrile O-ring, which fits into the entry body to make a part chamber
into which a two-part epoxy putty setting compound is applied to provide an inner seal around the
conductors.
a union nut that couples the entry body and ferrule together
a conduit nut that is screwed and secured into the ferrule with Loctite 2701 adhesive
NOTE:- * 2 ½” NPT thread option (Max Cable Diameter = 65.0)( Max Diameter over Cores = 58.1)
* 2 ½” NPSM thread option (Max Cable Diameter = 67.0)( Max Diameter over Cores = 59.9)
Stopper
Box
Size
Standard
Entry threads
Max
Cable
Diameter
Max
Diameter
over Cores
Max No of
Cores
Standard male
connection
thread size
Standard female
connection
thread Sizes
Metric
NPT
Metric
NPT
Metric
NPT
20
M20
½” NPT
14.0
12.5
40
M20
½” NPT
M20
½” NPT
25
M25
¾” NPT
20.0
17.8
60
M25
¾” NPT
M25
¾” NPT
32
M32
1” NPT
26.3
23.5
80
M32
1” NPT
M32
1” NPT
40
M40
1 ¼” NPT
32.2
28.8
130
M40
1 ¼” NPT
M40
1 ¼” NPT
50S
M50
1 ½” NPT
38.2
34.2
200
M50
1 ½” NPT
M50
1 ½” NPT
50
M50
2” NPT
44.1
39.4
400
M50
2” NPT
M50
2” NPT
63S
M63
2” NPT
50.1
44.8
400
M63
2” NPT
M63
2” NPT
63
M63
2 ½” NPT
56.0
50.0
425
M63
2 ½” NPT
M63
2 ½” NPT
75S
M75
2 ½” NPT
62.0
55.4
425
M75
2 ½” NPT
M75
2 ½” NPT
75
M75
-
68.0*
60.8*
425
M75
-
M75
2 ½” NPT*
75
-
3” NPT
68.0
60.8
425
-
3” NPT
-
3” NPT
80
M80
3” NPT
72.0
64.4
425
M80
3” NPT
M80
3” NPT
85
M85
3” NPT
78.0
69.8
425
M85
3” NPT
M85
3” NPT
90
M90
3 ½” NPT
84.0
75.1
425
M90
3 ½” NPT
M90
3 ½” NPT
100
M100
3 ½” NPT
90.0
80.5
425
M100
3 ½” NPT
M100
3 ½” NPT
Variation 1 - This variation introduced the following changes:
i. The KUB, KB, KBOS and KSB size 20s and 20 cable glands to be used with an alternative, cone
component; in this form, the glands are designated KUB, KB, KBOS and KSB (see details below) and
are only suitable for braided cables:
Entry
thread
size
Gland
size
Max. Ø
over cores
(mm)
Max.
number
of cores
Max. inner
sheath
(mm)
Outer sheath
(standard) (mm)
Braid dia.
Min.
Max.
Min.
Max.
M20 x 1.5
20S
10.4
8
11.7
11.5
16.0
0.15
0.35
M20 x 1.5
20
12.5
14
14.0
15.5
21.1
0.15
0.5
Design options for KUB, KB, KBOS and KSB
The KUB, KB, KBOS and KSB may be used with of an alternative outer sheath seal that is red in
colour and has a reduced bore size that accommodates an alternative range of outer sheath
cable sizes; in this form, the glands are designated KUB, KB, KBOS and KSB (see details below):