British General Fortress 8-24V AC 8VA Bell… (8707P)

£ 8.95INC VAT

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British General Fortress 8-24V AC 8VA Bell Transformer Module (8707P)

For use with metal or insulated consumer units and enclosures. Provides constant power to a mains-powered door bell. Can be used in a high integrity circuit. Works with a hard wired door bell, stepping down the voltage from 230V to 8-24V.

  • DIN Rail Mounted Fitting
  • Overload Protection
  • 2 Modules

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View all: British General Doorbell Transformers

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Rated 5 out of 5 by from A Ringing Endorsement. I got this to power a Eufy Video Doorbell. It sits nicely in a couple of spare slots in the consumer unit so is very tidy. The doorbell is running happily on the 12 volt circuit. Overall it is a cost effective and tidy way of supplying the doorbell. Can't comment on reliability as it has only been running for a few weeks so just gave the middle rating as you can't leave it blank.
Date published: 2021-05-21
Rated 5 out of 5 by from Doorbell fitted...ding-dong! First time installing an item to consumer unit. This product made it easy. Very solid 'snap' fit on DIN rail makes it solid.
Date published: 2021-05-12
Rated 5 out of 5 by from 8-24v 8va bell transformer i used this for my sons new door bell push which is 24v its the nestle system that records the caller and you can talk to them in any room of the house he uses a app on his mobile phono etc thats all new to me i recomend that you also use wylex ese2 2-module enclosure to house it in
Date published: 2021-03-31
Rated 4 out of 5 by from Not enough juice If you're planning on using this with a Nest Hello and want to use your original chime too, then in my experience it doesn't output enough power. It will power the doorbell itself no problems, just not the chime on top of that. I found a 15v 1A (15W) AC adapter elsewhere which works fine.
Date published: 2021-03-26
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Buzzing noise

There is quite a loud buzzing noise coming from the transformer when used with my nest hello doorbell (12v). I've heard they are quite delicate. Is it worth replacing to see if a different one fixes the noise problem?
Asked by: Joel7
I’ve tried a few, they all buzz loudly. I’d love a solution to this if anyone has one.
Answered by: NathN
Date published: 2021-05-02

What type of DIN Rail does it require? C section or Top Hat ?

Asked by: Zenas
Hi Zenas, This product would be suitable for Top Hat DIN Rail Mounting. Kind Regards, BG Technical Support
Answered by: Nexus Technical Team
Date published: 2021-05-10

Ring video Door Bell Resistor or not?

Hi as anyone fitted a 25ohm 50w resistor with this transformer to a Ring Video Door Bell Ist Generation as recommended by Ring ?
Asked by: jimf1
Hi jimf1, As Ring have the best technical familiarity with their products we would have to suggest that you follow any installation guidance which they give (i.e. install a resistor as indicated)
Answered by: BG Technical Team
Date published: 2021-06-10

Can I power this (in parallel) off a ceiling light rose?

I don't have any sockets that are close by I can spur off so was wondering if it was possible as I don't want run lengthy cables to get power. The ceiling light inside the porch is the closest power source. I want to power a eufy video doorbell.
Asked by: JamesClifford
Hi JamesClifford, This is a Consumer Unit device, so should be mounted inside the consumer unit with feed wiring from it out to the doorbell.
Answered by: Nexus Technical Team
Date published: 2021-04-18

ring door bell again....can i run live,neutral and earth into this and wires out to the doorbell and put it in a junction box on the wall ? is that suitable ?

Asked by: steviebb
Hi steviebb, There is no Earth connection on this device as it is class 2 (plastic bodied so non-conductive). As for mounting, it is a Consumer Unit device so should only be mounted inside there really.
Answered by: Nexus Technical Team
Date published: 2021-04-18
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Amp Rating 8 VA
Brand British General
CSU Device Bell Transformers
Incomer Fitting Type DIN Rail Mounted
Manufacturer Guarantee 1 Year Guarantee
Model Name Fortress
Model No CUB1-01
Overload Protection No Overload Protection
Pack Size 1
Pieces in Pack/Case 1
Power Voltage Supply 230 V
Product Depth 68 mm
Product Height 80 mm
Product Type Bell Transformer Module
Product Width 35 mm
Rated Operational Voltage (Ue) 240 V AC
Suitable Cable Size 16 mm²
Terminal Capacity Terminals accept up to 16mm² cable