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2. Basement waterproofing - Wikipedia

   en.wikipedia.org/wiki/Basement_waterproofing

   The drainage system collects any water entering the basement and drains it to an internally placed sump pump system, which will then pump the water out of the basement. The Federal Emergency Management Agency (FEMA) recommends basement waterproofing with a water alarm and "battery-operated backup pump" as a preventive measure against the high ...

3. Sump pump - Wikipedia

   en.wikipedia.org/wiki/Sump_pump

   Some sump pumps can be automatically powered from a battery backup system, or a separate battery-powered system may be installed, typically with its float switch set slightly higher than the float switch of the primary pump. Using a separate generator is another option. These do often require a manual setup.

4. Emergency power system - Wikipedia

   en.wikipedia.org/wiki/Emergency_power_system

   An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply. A standby power system may include a standby generator, batteries and other apparatus. Emergency power systems are installed to protect life and property from the consequences of loss of primary ...

5. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   A UPS differs from a traditional auxiliary/emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions by switching to energy stored in battery packs, supercapacitors or flywheels. The on-battery run-times of most UPSs are relatively short (only a few minutes) but sufficient ...

6. Backup battery - Wikipedia

   en.wikipedia.org/wiki/Backup_battery

   The safety of power station employees is a major concern during an unscheduled power outage at a power plant. A bank of large station backup batteries are used to power uninterruptible power supplies as well as directly power emergency oil pumps for up to 8 hours while normal power is being restored to the power station.

7. Auxiliary feedwater - Wikipedia

   en.wikipedia.org/wiki/Auxiliary_feedwater

   Auxiliary feedwater is a backup water supply system found in pressurized water reactor nuclear power plants (PWRs). This system, sometimes known as emergency feedwater, can be used to cool the reactor, if normal feedwater to the steam generators fails to work.