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Lamp holder are mounted on
Wall
Ceilings
Doors
A and B both
A and B both
Lamp holders are electromechanical devices used to support lamps and connect them to the electrical supply. In domestic and industrial wiring installations, they are primarily mounted on ceilings (pendants or batten holders) or walls (bracket lights) to provide illumination.
Lamp holders are electromechanical devices used to support lamps and connect them to the electrical supply. In domestic and industrial wiring installations, they are primarily mounted on ceilings (pendants or batten holders) or walls (bracket lights) to provide illumination.
P=VI тАФ Power consumption by the lamp in the holder
I=Vcos╧ХPтАЛ тАФ Current flowing through the lamp contacts
A lamp holder functions as a bridge between the wiring system and the light source. It utilizes internal contact terminals to establish an electrical path from the supply wires to the lamp cap. For ceiling-mounted installations, pendant holders are often used for general light distribution, while wall-mounted fixtures (brackets) are used for aesthetic or task-specific lighting.
Lamp holders (e.g., B22 or E27) must comply with IS:1258 standards in India.
Ceiling rose is often used to connect pendant lamps to the ceiling.
Wall brackets are common in bedrooms or for decorative purposes.
The choice of mounting depends on light distribution requirements and architectural design.
Flexibility in illumination design
Easy replacement of lamps
Requires careful insulation to prevent short circuits
Subject to mechanical wear and tear over time
General illumination in residential buildings
Industrial workshop lighting
Decorative and task lighting
Option C is incorrect because mounting directly on doors is structurally impractical and poses safety risks due to movement.
The standard socket type in India is predominantly the B22 bayonet cap type.
D is correct тАФ Lamp holders are designed for versatility in interior electrical layouts and are standardly installed on both ceiling surfaces and wall surfaces depending on the illumination requirement.
Always ensure the mounting surface is capable of supporting the weight of the lamp fixture to comply with safety guidelines in internal wiring rules.