A carbon dioxide extinguisher (used on electrical installation fires) should not be used in a confined space, as the user could be overcome and be asphyxiated (deprived of air).
It will displace the oxygen in the room, thus depriving the fire of one of the three essential elements to sustain fire (fuel, heat, and oxygen). Since there a very high probability that there would be active electricity in the room, water would be a bad idea.
CO2
Yes, fire extinguisher gases can be harmful to humans if inhaled in large amounts. Some common fire extinguisher gases, such as carbon dioxide, can displace oxygen in the air and lead to asphyxiation in confined spaces. It is important to use fire extinguishers only in well-ventilated areas and to evacuate the area if the gas is released.
Signal is the electrical(discussion is confined to electrical domain only) quantity which varies between two levels and holds some useful information.
An extinguisher labeled B-I is designed for use on Class B fires, which involve flammable liquids such as gasoline, oil, and grease. The "I" indicates the extinguisher's capacity, with B-I extinguishers being suitable for small fires in confined spaces. These extinguishers typically contain extinguishing agents like foam or dry chemical and are ideal for use in homes or small businesses. Always check the manufacturer's guidelines for specific applications and limitations.
Carbon Dioxide extinguishers displace the air from the immediate area, and so are not suitable for confined spaces (though they're safe in a normal-sized room). Dry powder is non-toxic, but is discharged as a cloud of irritating dust, which can cause vision problems in a confined space. Generally, I would use the nearest extinguisher suitable for the fire, and vacate the area immediately after discahrge to wait for the fire service to check the area.
The electrical panel should be located in a readily accessible area, not in a closet or confined space, to ensure safety and easy maintenance.
The prisoners were confined to their cells for the night.
It is to reduce the impact of electrical shock to the workers (in case any). By having less voltage the consequence would also be diminished. Installation with higher voltage (110 V, 220 V, or 380 V) is possible to create a fatal incident depending upon the environment (wet, metal surface, etc.)
Bills shall be confined to one subject
confined mean is is don't know that why is looking for