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Fire Alarm, Data and Power Sharing Tray

fiftyhertz

Im looking at a project where the majority of ceilings are going to be exposed. The interior designer is being quite fussy with the M&E installation. 

I think the neatest solution is going to be a single tray split into three compartments with steel dividers, LV soft skinned submains and final circuits, in the middle the Fire alarm and on the other end Data. The majority of the data install is going to be fibre, so not a major issue. Any Cat 6 data points are separated from the power by the fire alarm portion of the tray, and therefore 50mm away from the unscreened power. 

Ive read the clause in 5839-1, and dont think this contravenes the regulations. Id be intrested to hear from anyone whos done this before or has an opinion?

Thanks

  • 0

    Not quiet the same, but I have seen ‘tray on tray’ to reduce the visual impact, so that from below it looks like one wide one, (painted to match the ceiling) but above that runs a narrower tray on stilts. In cross-section looks a bit like a side view  of one of those fancy tea shop cake stands where  a small plate  is above a large one. sortof thing

  • 0

    HI Fiftyhertz

     

    We have done as you described quite a few times, however the visiual effect is quite poor (IMO obviously) - especially where the cables leave the tray, even when this is in conduit; the cables tend to be seen - or bow up off the tray to enter the conduit - and the top of the tray gets very very dusty very quickly and are a pain to maintain. 

     

    I think Trunking with galv conduit off shoots is a better solution, and it stays cleaner for longer. The middle trunking take off in galv conduit is from the bottom of the trunking, so plan the supports so that do not interfere.

  • 0

    BS 6701 (for the data) requires physical separation of at least 50 mm (but may be greater under some conditions) even with metallic barriers … that does not necessarily mean separate containment though, provided the separation is physically maintained along the containment route.

     

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