Some examples and use cases from the internet:

Some examples and use cases from the internet:

• The following are admissible for use as an emergency power source:
• Inspection of emergency source of power to radio installations,
• There shall be at least two power sources for the electrical part of the fire alarm system, one of which shall be an emergency power system (i.e. emergency power source and emergency switchboard).
• spaces containing emergency sources of power and lighting,
• .4 The emergency switchboard shall be situated as near as practicable to the emergency source of power.
• inspection of emergency source of power to radio installations,
• .5 The emergency source of power required by paragraph.1 shall:
• Control stations are those spaces in which the ship's radio or main navigating equipment or the emergency source of power is located or where the fire recording or fire control equipment is centralized.

• A gas meter powered from the mains (AC or DC) shall be provided with an emergency power supply device or other means to ensure, during a failure of the principal power source, that all measuring functions are safeguarded.
• 1 All tunnels shall have an emergency power supply able to ensure the functioning of safety equipment until all users have evacuated the tunnel.
• All tunnels shall have an emergency power supply able to ensure the functioning of safety equipment until all users have evacuated the tunnel.
• The emergency power supply shall be automatically operative after the total failure of the main electrical generating system and clear indication shall be given on the instrument that the attitude indicator is being operated by emergency power.
• A gas meter powered from the mains (AC or DC) shall be provided with an emergency power supply device or other means to ensure, during a failure of the principal power source, that all measuring functions are safeguarded.
• Cotton, is there an emergency power supply to the transfer station?
• Provides reliable operation for a minimum of 30 minutes after total failure of the normal electrical generating system, taking into account other loads on the emergency power supply and operational procedures;
• The projected operating period for the emergency power supply is to be defined according to the defined purpose of the passenger vessel.