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external building - radio or catenary
#1
morning.

a debate - large building with a new fire alarm being installed (morley zx with apollo xp95), existing underground cables to hv/lv building can not be accessed an replaced (nor existing cables used) this is a long story but union/health and safety etc/don't ask!

options are:

1 - catenary wire for loop devices overhead to this building.

2 - separate panel for this hv/lv building with a radio link (needs to be fully compliant so scope?) to and from main building system.

3 - all radio in the hv/lv building with an apollo loop diversity module on the main building (outside?) picking up apollo radio wireless devices in the hv/lv building

hv/lv building will consist of 3 mcps,, 3 smokes, 2 sounderbeacons. further complication is both buildings are all metal girders and aluminium cladding and this is obviously a hv/lv building so I worry about radio signals and intereference...

has anyone got any experience on the best way to go? In terms of cost? ongoing maintenance? future problems?

thanks for any replies.
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#2
You could do a survey before getting egg on your face with xpander. Survey kits are readily available, we have 2 that we lend out to our customers.
Martin Wison
KGM Fire and Security Distribution Ltd.
Rochester, Kent.
01634 716882
http://www.kgmfireandsecurity.co.uk
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#3
Personally would go Apollo expander but you should always do a survey before fitting any type of radio kit
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#4
As Mr C says Apollo Xpander I have done this a few times because of no access to the LV/HV Switchroom make sure you do a survey
I have installed this way with Morley and Advance panels no problems at all
Peter Robinson




07889 038650

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#5
I’d personally get a cable put in if possible. Love Xpander, but prefer wired
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#6
Im also old school, and like something copper to test, if its faulty. Wired all the way.
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#7
(11-12-2018, 11:42 PM)Tilly Wrote: Im also old school, and like something copper to test, if its faulty. Wired all the way.

Agreed wired is always best.... but when needs must a properly designed and installed radio system is just as good, more expensive in long run due to batteries but sometimes its the only way.
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#8
Remember if the transformers are not heavily loaded at the time of survey the EMF interference will differ.

I do HV all the time and have never seen a radio system in any and we have over 4200 substations.
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#9
We did some wireless in metal containers recently. Needed the expander 6m away. By the time we had good signal levels. We may aswell have put wired gear in
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