Skip to Content


These Ex approved cable and pipe transits are used in high-risk land-based Ex e and Ex tb environments to minimize danger by preventing fire, water, gas, chemicals and other hazards substances.

RGB Ex transit is casted into a concrete wall or floor. It is manufactured from a 60x60x6 mm angle bar.

Nema 250
Nema 250

Benefits of MCT Brattberg Ex systems

  • Ex rated transit for hazardous environments
  • Assists cable management
  • Seals the penetration against the passage of fire, water, gas, sound and environmental hazards
  • Can be combined with special EMC modules and for Grounding and Bounding
  • Unlike other brands our system can be dismantled and re-used
  • Cable dimension marked on block
  • No adaptation of standard blocks needed



The marking of the equipment and protective system

Group II Category 2GD Ex eb IIC Gb Ex tb IIIC Db Tamb (-60°C to+70°C)


Technical specifications

RGB Ex sizes

The standard transit is made of an angle bar 60x60x6 mm, in mild steel, stainless steel or aluminium. The mild steel transits are supplied with two types of surface finish, primer or galvanized.

Standard frames come in eight sizes: 1, 2, 3, 4, 5, 6, 7, and 8. 
The internal width can be 60.5 ± 1 (Size 1,3,5,7) or 120.5 ± 1 (2,4,6,8).

Note that there can be limitations in type-approvals & certificates, making certain sizes inapplicable.


For further technical information see tables in our Online Catalogue:


Resistance to fire:

Enclosure degree of protection Nema 250:
3R; 4X; 12 - Nema 250-1st

Enclosure degree of protection IP: 
IP65; IP66; IP67; IP68 2 meters 60 min - IEC 60529


Lycron data

Read Lycron data sheet:
Data sheet Lycron

Lycron is halogen free and flame retardant.


For all approvals, please also see Certificates 


  • Available only as component.

Component is not intended to be used alone and requires additional consideration when incorporated into other equipment or systems for use in explosive atmospheres (refer to IEC 60079-0)

  • Ex system combined with EMC has yellow marking on the front face (see EMC instructions)

Correct and safe installations

To achieve the highest standard of safety, a cable or pipe transit must be installed correctly. As there are many different types of frame – which may be either welded, bolted or glued into position – and insert block, it is essential that installers known when to use the most appropriate installation method.

For more information, please view following instructions, videos or download manuals as PDFs.

Instructions 1
Instructions 2
Instructions 3
How to install a MCT Brattberg RGS/RGB frame, vertical

Multiple frames


Horizontal multiple frames are described by listing the frame type and size x the desired number of horizontal openings.
Designation (starting at bottom):
Frame type 6x4


Vertical multiple frames are described by listing the bottom frame type and size + the next frame type and size.
Designation (starting at bottom):
(frame type) 6+6+4 and (frame type) 6+4+2


List the entire vertical frames x the desired number of horizontal repetitions.
Designation (starting at bottom):
(frame type) 6+4+2x4

NOTE: All multiple frame designations must be preceded by the frame type.

NOTE: All multiple frame designations must be preceded by the frame type.

Components Ex

Ex and ATEX requirements are very strict, some Ex Insert blocks may not be approved with certain systems.



  • Insert Blocks combined with EMC has yellow marking on the front face (see EMC instructions)

Ex Insert Blocks (IECEx/ATEX)


Standard Block

Standard Block for a fast and safe installation.

Read more


Eleven blocks and 66 dimensions.

Read more


The U-Block is used to convert the external dimensions of Insert Blocks, AddBlocks and Spare Blocks to the next modular size.

Read more
Spare Block


The unused space in the frame is filled with solid spare blocks. Using the spare blocks allows the option of fitting new cable in the future.

Read more



MCT Brattberg Lubricant for easier and safer installation.

Read more

PTG Presswedge

The Presswedge compresses the system and completing the seal.

Read more

E-PTG Presswedge

The Presswedge with EMC and G&B capabilites compresses the system and completing the seal.

Read more