Table 7 Miscellaneous sprinkler system component data
Description | Source | Unit | Minimum | Mean | Maximum |
|---|---|---|---|---|---|
Pressure switch | (Watanabe 1979) | per demand |  | 8.99 × 10 -4 |  |
Down time | (Watanabe 1979) | per demand |  | 3.7 × 10 -3 |  |
Incomplete protection | (Watanabe 1979) |  | 1.03 × 10 -4 |  |  |
Alarms fail to function | (Moelling et al. 1980) | per demand | 2.68 × 10 -2 | 3.62 × 10 -2 | 4.81 × 10 -2 |
Personnel fail to trip manual release | (Moelling et al. 1980) | per demand |  | 2.00 × 10 -1 |  |
Back-up batteries for diesel pump | (Moinuddin et al. 2009) | per demand |  | 2.68 × 10 -2 | 4.92 × 10 -2 |
Mains power in building | (Moinuddin et al. 2009) | per demand |  | 1.61 × 10 -4 | 3.11 × 10 -4 |
Building power generator | (Moinuddin et al. 2009) | per demand |  | 5.24 × 10 -3 | 1.25 × 10 -2 |
Pressure switch | (Moinuddin et al. 2009) | per demand |  | 7.82 × 10 -3 | 1.17 × 10 -2 |
Direct brigade alarm | (Moinuddin et al. 2009) | per demand |  | 5.27 × 10 -3 | 9.57 × 10 -3 |
Jacking pump | (Moinuddin et al. 2009) | per demand |  | 9.85 × 10 -3 | 1.55 × 10 -2 |
Back-up batteries for brigade alarm | (Moinuddin et al. 2009) | per demand |  | 2.57 × 10 -3 | 6.71 × 10 -3 |
Alarm motor and gong | (Nash and Young 1991) | failures/year |  | 1.6 × 10 -2 |  |
Accelerator | (Nash and Young 1991) | failures/year |  | 7.9 × 10 -3 |  |
Alarm motor and gong | (Finucane and Pinkney 1988) | failures/year |  | 1.6 × 10 -2 |  |
Accelerator | (Finucane and Pinkney 1988) | failures/year |  | 8.0 × 10 -3 |  |
Flow alarm | (Budnick 2001) | failures/hour | 5.80 × 10 -6 | 1.50 × 10 -5 | 2.70 × 10 -5 |
Motor gong | (Budnick 2001) | failures/hour | 4.10 × 10 -5 | 2.50 × 10 -5 | 1.30 × 10 -5 |
Fire department connection (FDC) | (Budnick 2001) | failures/hour | Â | 0 | Â |