BRK 770MBX Hard Wired Mains Powered Ionisation Smoke Alarm with 9V Battery Back-up

(208 customer reviews)

£12.46 Ex VAT

Out of stock


BRK 770MBX Hard Wired Mains Powered Ionisation Smoke Alarm with 9V Battery Back-up

Mains powered hard wired ionisation alarm with 9V alkaline battery back-up and a PUSH-FIT docking base system; designed to ensure quick and easy installation of base unit to the mains feed supply at installation stage (1st fix) and for quick and easy connection of alarm to base unit (2nd fix). The PUSH-FIT base provides spacious room for wiring in premises such as flats where concrete ceilings can be problematic. Top and side entries accommodate for either cable or mini trunking installations.

These alarms can be installed to provide a fire detection system to comply with British Standard BS 5839: Pt.6 Grade D “System incorporating one or more interlinked mains powered smoke alarms (and heat alarms if required), each with an integral stand-by supply. The interlink can be hardwired or radio-interlinked”.

  • 230V hard wired mains powered smoke detector / alarm
  • 9V alkaline battery back-up (included)
  • PUSH-FIT docking base. No separate pattress plate required
  • Ionisation sensing technology
  • Test and silence button
  • Low battery warning
  • Multi-alarm interlink (up to 12 smoke and heat units from list below)
  • Compatible with DS700RF wireless interlink base
  • LED operating indicators
  • 85db alarm
  • 5 year guarantee
  • BS EN14604: 2005 standard
  • CE mark

Dimensions: 141mm diameter x 55mm deep

Compatible devices in this range:-

750MBX – Optical Smoke Alarm
790MBX – Heat Alarm
DS700RF – Wireless Interlink Base

Multi-alarm interlink:-

When more than one alarm is installed within the same building these should be connected together so that if one alarm is activated , all alarms sound.

The normal wiring method for these alarms is 6242Y 1 or 1.5mm (twin & earth) from the power supply, which can be either a dedicated circuit at the consumer unit or a local normally used lighting circuit, to the first alarm position then 6243Y 1 or 1.5mm (3 core & earth) from the first alarm to the second alarm and so on. The maximum circuit length is 250 metres.

Alternatively you can use the DS700RF Wireless Interlink Base to replace the interlink. Please note that when using interlink bases a permanent power supply is still required to each alarm position (using 6242Y 1 or 1.5mm twin & earth cable).

Replacement models:-

This model replaces the 670MBX model which is now out of production.

208 reviews for BRK 770MBX Hard Wired Mains Powered Ionisation Smoke Alarm with 9V Battery Back-up

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