Gra​des

The different Grades of fire alarm system depends on the equipment installed as detailed below.


• Grade A - "Professional Fire alarm" This consists of separate devices and sounders (can be combined (think Fike or XP95)) these all go back to a CIE (fire panel) with a battery back up of at least 24 hours. This MUST conform to BS EN 54

• Grade B - "Professional Fire alarm" This compiles of separate devices and sounders (can be combined (think Fike or XP95)) these all go back to a CIE (fire panel) with a battery backup of at least 24 hours.

• Grade C - Mains powered alarms/sounders with battery back, there must also be a control panel.

• Grade D - Mains powered alarms with a battery backup.

• Grade E - Mains powered alarms with no back up battery.

• Grade F - Battery powered alarms.

Categories

The different catagories of fire detection are as follows

  • L1 - AFD throughout all areas
  • L2 - AFD installed to L3 plus defined areas
  • L3 - AFD in escape routes and rooms opening onto escape routes
  • L4 - AFD in escape routes that compromise circulation areas like stairways and corridors
  • L5 - A non-prescriptive system in which the covered area or areas is designed to satisfy a specific fire risk.


BS5839-6 Examples

LD1 - High Protection

  • All areas with potential for a fire to start, e.g.;
  • Kitchens
  • Living Rooms
  • Bedrooms
  • Hallways
  • Landings
  • Laundry cupboard with electrical equipment
  • Garages

LD2 - Medium Protection

  • Escape routes and high risks areas e.g.;
  • Kitchens
  • Hallways
  • Landings
  • Living Rooms

LD3 - Minimum Protection

  • Escape routes e.g.;
  • Landings
  • Hallways

Grey Shield Benchmark Standard - General Needs

  • Single household occupancy (up to 4 stories)
    Grade D:LD3
  • Single household occupancy (5-6 stories)
    Grade A:LD2
  • HMO with shared cooking facilities (up to 2 stories)
    Grade D:LD2
  • HMO with shared cooking facilities (3-4 stories)
    Grade D:LD2
  • HMO with shared cooking facilities (5-6 stories)
    Grade A:LD2
  • HMO bedsit with shared cooking facilities (up to 2 stories)
    Grade D:LD2 (in common areas plus a Heat detectors in each bedsit)
    Grade D interlinked Smokes in all bedsits
  • HMO bedsit with shared cooking facilities (3-6 stories)
    Grade A:LD2 (in common areas plus a Heat detector in each bedsit)
    Grade D interlinked Smokes in all bedsits
  • HMO bedsit with individual cooking facilities (up to 2 stories)
    Grade D:LD2 (in common areas plus a Heat detector in each bedsit)
    Grade D standalone Smoke in each bedsit
  • HMO bedsit with individual cooking facilities (3-6 stories)
    Grade A:LD2 (in common areas plus a Heat detector in each bedsit)
    Grade D standalone Smoke in each bedsit
  • House converted to self-contained flats (up to 2 stories)(Prior to 1991 (approved document B/Building regs))
    Grade D:LD2 interlinked(in common areas plus a Heat in each flat (located in the area leading to the escape route))
    Grade D:LD3 standalone Smoke in the area leading to the escape route
  • House converted to self-contained flats (3-6 stories) (Prior to 1991 (approved document B/building regs))
    Grade A:LD2 (in common areas plus a heat in each flat (located in the area leading to the escape route))
    Grade D:LD3 standalone Smoke in the area leading to the escape route