This presentation contains details of electrical appliances and types of materials used in home electrical fittings and types of lighting systems

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10. TYPES / HOLES OF ELECTRICAL SOCKETS
Usually there are two or three slots or holes in electrical sockets.
The two hole electrical sockets are used for two pin plugs and
three hole sockets for three pin plugs.
Two hole sockets: These electrical sockets carry two wires one of
which is the live or hot wire carrying alternating current from
main AC supply to the appliances. The other wire is the neutral
wire that backs the current from the equipment to the mains
supply.
Three hole sockets: In three hole electrical sockets, the function
of two wires (live and neutral) are similar to that of two hole
sockets but the additional or the third wire is earth or ground
wire that grants electrical safety. In case of any fault in the
electrical system, the ground wire ensures that the exposed
conductive surfaces should be at the same electrical potential
equal to the earth. This minimizes the risk of electrical shock if
someone accidentally touches electrical device.
Electrical Socket Materials
Electrical sockets usually have either plastic or metal body.

14. One Way Two Way Side Two Way Three Way
Four Way Coupler
Tee Elbow
Bend

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