303049 / 825060300230
2022-05-30·BA00·III·en·00
Product Selection, Project Engineering and Modification
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Ex d enclosure made of aluminium/flameproof enclosure
8250/0 series empty enclosure,
8250/1 series terminal box,
8250/5 series control panel/control station
5.2
External Add-On Components
(Cable Entries, Stopping Plugs, Breathers)
5.2.1 Fitting of Add-On Components by the Customer
Selecting add-on components
We recommend fitting the following add-on components to the enclosure:
Cable entry
• For conductors that are permanently installed: Cable entries for conductors that are
permanently installed
• For conductors that are not permanently installed: Cable entries with strain relief
Sealing unused entries
• Use stopping plugs that comply with the type of protection required.
Draining and equalising pressure
• Breather
• Cover hinge.
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Equip the device carefully and in accordance with the safety notes
(see the "Safety" chapter).
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Refer to the specifications on the device's rating plate to help you determine which
components and seals to use and what operating temperatures they will need to be able
to withstand.
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Calculate the usable area (collision frame) for add-on components;
see the "Annex B: Dimensional drawings" chapter.
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Ensure that the diameter of the drilled holes matches the dimensions of the built-in parts
or their seals.
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The use of add-on components with a flat seal is preferred.
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Provide protection against loosening.
5.2.2 Additional external Add-On Components
Drilled holes are generally fitted with the components intended for the application at the
factory.
If customers intend to fit the components themselves, dust and transport protection is
provided for the openings in the enclosure (adhesive tape with a warning note or plastic
caps) at the factory.
If not otherwise specified by the manufacturer, it is recommended to apply acid-free
grease that is suitable according to EN 60079-14 to the thread during mounting of metal
cable entries, stopping plugs or breathers.
Additional add-on components may only be fitted by R. STAHL. Any components
attached by the customer must be subjected to individual acceptance testing by
R. STAHL or a notified test body (third-party inspection).