Er det begrensing på hvor mange reduction nippler man kan bruke på en exe boks.
til info er den montert i 2012 og har 3 reducere montert før gland
Hei Sverre. Holder på å lete litt etter svaret på dette jeg også;
Fant følgende i IEC 60079-1 av 2014:
13.2 Threaded holesThreaded holes in enclosures to facilitate cable glands or conduit entries shall have thethread type and size identified, for example M25 or 1/2NPT. This may be accomplished by marking of the specific thread type and size adjacent to the hole in accordance with Table15, marking of the specific thread type and size on the nameplate in accordance with Table 15, identification of the specific thread type and size as part of the installation instructiondocument, with a reference marking on the nameplate (via text or ISO symbol B.3.1 fromISO 3864) in accordance with Table 15.The manufacturer shall state the following in the documents defining the electrical equipment:a) the places where entries can be fitted; andb) the maximum permitted number of these entries.Each entry shall have no more than one thread adapter when an adapter is used. A blankingelement shall not be used with an adapter.13.3 Non-threaded holes (for Group I only)For Group I only, plain (non-threaded) holes to facilitate the installation of cable glands orbushings shall state the following in the documents defining the electrical equipment:a) minimum width of joint L and maximum gap for flanged, cylindrical or spigot joint;b) mounting stud or bolt specifications (such as diameter, thread, tensile strength, length,head type, torque) and position (such as pitch circle diameter and spacing);c) keeper plate, and associated fastener(s), dimension requirements and position (such asquantity, spacing of the holes to support the gland, diameter, coupling means);d) minimum tensile strength requirement of materials, fasteners, etc. (based on equipmentreference pressure);e) maximum and minimum thread engagement for the holes in the enclosure; and
Fant også svar i fra produsent;
https://www.heatingandprocess.com/product/product-category/exe-adaptors-hazardous-area/
Så tolker det dit hen at det kun er lov med en reduksjonsnippel???
Mvh
Daniel
Hei,
det står ikke noe spesifikt om dette i verken IEC 60079-14 eller i utstyrsnormene for Ex e, men siden en slik løsning vil bli ganske lang vil den antageligvis ikke oppfylle normert slagtester, veldig mange anlegg har beskrevet internt i anleggsspesifikasjonen at det kun skal være 1 adapter. Det går og an å høre med nippel eller skap leverandør om dette er noe de tillater med sine produkter.
IEC 60079-1 Er standarden for Ex d, ikke Ex e, så ja for Ex d gjelder dette.