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.