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

RGG frame type is bolted onto a concrete wall or floor or a plaster board wall. It is manufactured from a 60x60x6 mm angle bar.

Nema 250
Nema 250


RGG 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. The internal width is always 120.5 ± 0.5.

The transit is made of two angle bars 60x6 and two gables in galvanized mild steel.

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.

Can be installed in horizontal combinations.
Please see information drawings for detailed data.


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 

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.

Download pdf instructions

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.

Insert Blocks


Standard Block

Standard Block for a fast and safe installation.

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Newly developed Insert Block that provides greater flexibility, simple and safe installation.

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Eleven blocks and 66 dimensions.

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

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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.

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Insert blocks for Waveguides

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STG Endpacking

Installed between compression plate and the top of the frame, completing the seal.

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PTG Presswedge

The Presswedge compresses the system and completing the seal.

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To be placed between each row of blocks.

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MCT Brattberg Lubricant for easier and safer installation.

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