Cable transits for EX zones
According to EU regulations and IECEx standards, all working environments where explosive materials are present must apply the ATEX directive. This applies to areas where fuel is produced and stored, where chemicals are handled and where hazardous dust is formed. MCT Brattberg has developed and tested an Ex-approved range of cable and pipe transits to protect adjacent sites in such areas.
The marking of the equipment and the security system
Group II Category 2GD Ex eb IIC Gb Ex tb IIIC Db Tamb (-60°C to +70°C)
Casting, welding or build-in options
The Ex cable entries from MCT Brattberg are available in three different types, for embedding (RGB), welding in (RGS) or built-in (RGP)
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MCT Brattberg solutions for Ex zones
Ex concerns not only electrical equipment, but all equipment and protective systems for use in potentially explosive atmospheres. In all buildings in the world where there is a risk of explosion, the equipment and protective systems must have an Ex or ATEX certificate.
IECEx stands for the certification by the International Electrotechnical Commission for Explosive Atmospheres. To be IECEx certified, all products must go through a controlled process by the International Electrotechnical Commission to ensure they meet minimum safety requirements. This process will determine whether the products can be used in hazardous or potentially explosive locations.
ATEX and IECEx certified
Like all MCT Brattberg products, the Ex products from MCT Brattberg are approved by DNV-GL and meet the quality and environmental standard requirements of ISO 9001, 14001 and OHSAS 18001. They also comply with the ATEX directive 114 (2014/34/ EU), the European standard for Ex products, as well as international IECEx requirements. MCT Brattberg conform to the Atex classification with the following notation:
Group II Category 2GD Ex eb IIC Gb Ex tb IIIC Db Tamb (-40°C to+70°C)
Ex blocks
The Ex blocks from MCT Brattberg can be recognized by the black marking on the ends of the blocks. This marking is a requirement to comply with the Atex certification. The marking of the MCT Brattberg blocks, components and windows conforms to the Atex classification with the following notation:
Group II Category 2GD Ex eb IIC Gb Ex tb IIIC Db Tamb (-40°C to+70°C)
Ex frames, stayplates and components
Frames
All standard frames made of steel, galvanized steel, aluminum or stainless steel can be used for an Atex or IECEx certified MCT Brattberg transit system. If a round Ex RGP transit is used as an Atex transit frame, this should always be done in combination with a steel or stainless steel sleeve from MCT Bratterg. This is a condition for the Atex certification when using the RGP frame.
Stayplates
Steel intermediate plates are used with every MCT Brattberg penetration in steel windows, while aluminum intermediate plates are used with Aluminum windows. When using the round RGP windows, and therefore also with the Ex RGP, no intermediate plates are required. To meet the Atex 114 and IECEx requirements, both galvanized intermediate plates and stainless steel intermediate plates are suitable as part of an Ex transit.
End seal
The end seal in an Ex penetration, which complies with the regulations of Atex 114 and IECEx, is only available in the form of a wedge version, the PTG. The use of a pressure plate (Comppla) in combination with an STG end seal is not permitted in an Atex 114 or IECEx approved penetration. The Ex version of the PTG end seal can be recognized by a specific marking plate, which shows the correct Atex notation.
Round Ex cable transits (RGP)
In addition to the various steel frames, an Ex version of the round RGP frame is also available. These are specially intended for use in Ex zones and are supplied with a certificate, issued by the factory in Sweden. For the application of the Ex version of the RGP, a certification condition is that it is always installed in an MCT Brattberg sleeve made of galvanized steel or stainless steel.
EX and EMC combined
For Ex environments where the cables also need EMC shielding, MCT Brattberg has special filler blocks available. The Atex certified filling blocks, which are also suitable for use in EMC-resistant penetrations, are comparable to E-MCT blocks, but also have a black Ex marking on the other side of the block. This means that these blocks are provided with a conductive thin plate halfway through the block, yellow EMC marking on one front and black EX marking on the other front.
![RGS6S Frame marine, stainless 1 x [internal size 220x120mm]](/media/products/mct-frames-rgs-RGS6S_1.jpg?v=1667401531)
![RGSFB6P Frame marine+bolted, primer 1 x [internal size 220x120mm]](/media/products/mct-frames-rgsfb-RGSFB6P_1.jpg?v=1667401533)
Other types
More info?
Do you have questions about the Ex cable penetrations or your specific situation, our MCT Brattberg specialist Maurice Welbie will be happy to help you.
