Sunday, March 27, 2016

Cable Glands for cable size; Flameproof and weather proof glands

Cable glands are used in cables for following purposes:-
1.       For removing strain in cable connections
2.       For providing earthing in case of armored cables
3.       They are used for providing cable entry into a panel.
There are different types of glands available for different types of cables. Cables may be of armored type, Un-armored type.
There are following types of glands are used:-
1.       Indoor glands- Brass Material
2.       Outdoor glands- Brass Material
3.       Unarmored cable glands- Brass material
4.       Weather proof glands/ Flameproof glands- Brass material
5.       PG threaded glands

In Industries most widely armored cables are used. Gland sizes for these cables are as per below requirements:-
Weather and flameproof glands are used in industries . Cables sizes and cable glands required are as below:-
No. of cores
Approx. overall diameter
Double compression type



Weather proof
Flameproof Type

4C X1.5 mmsq
16.5
CBW01S
CBF01S

4 C X 2.5 mmsq
17.0
CBW01
CBF01

4 C X 4 mmsq
19.5
CBW02
CBF02

4 C X 6 mmsq
21.5
CBW02
CBF02

4 C X10 mmsq
21.5
CBW03
CBF03

3.5C X25/16 mmsq
26
CBW04
CBF04

3.5C X 35/16 mmsq
28.5
CBW05
CBF05

3.5C X 50/25 mmsq
32.0
CBW06
CBF06

3.5C X 70/35 mmsq
35.0
CBW07
CBF07

3.5C X 95/50 mmsq
40.0
CBW08
CBF08

3.5C X 120/70 mmsq
43.0
CBW09
CBF09

3.5C X 150/70 mmsq
46.0
CBW09
CBF09

3.5C X 185/95 mmsq
50.0
CBW010
CBF010

3.5C X 225/120 mmsq
58.0
CBW011
CBF011

3.5C X 240/120 mmsq
59.0
CBW011
CBF011

3.5C X 300/150  mmsq
64.0
CBW012
CBF012

3.5 C X400/185 mmsq
72.0
CBW013A
CBF013A







There are both single compression and double compression cable glands used in industries. Differences between single compression and double compression glands are as below:-
1.       Double compression glands provide additional support to armored cables entering and exiting the panels. On the other hand single compression glands are used for light armored cables.
2.       Single compression cable glands compression is effective only at one place i.e. at cable armor. But in double compression cable glands compression takes place at both cable armor and at inner sheath. Thus double compression cable glands avoid entry of vapor as it may be possible in single compression cable glands. These double compression glands are thus known as weather and flameproof glands
Constructional difference between Single and Double compression glands:-
There are following parts in Single compression glands:-
1.       Gland body
2.       Nut for gland body
3.       Rubber seal
4.       Rubber washer
5.       Check nut
6.       Washer
There are following parts in double compression glands:-
1.       Gland body
2.       Nut for gland body
3.       Cone
4.       Cone ring
5.       Rubber seal
6.       Rubber washer
7.       Check nut
8.       Washer
From above it is clear that there is no cone and cone ring in single compression glands.

Double compression glands depending upon area of classification are used. For Hazardous area such as in oil and gas area flameproof double compression glands are used.