Plugs and sockets are provided by neptune [india] ltd . Neptune [india] ltd. Is -the global leader in insulated plugs and sockets. Connectors and socket outlet combinations are also available. Some of the salient features of these plugs are: high quality material with its advantages such as resistance to sudden changes in temperature, breaching strength, high insulation resistance, and chemical resistance; self retaining mounting screws; easily accessible terminal contact screws; and clamping screws of captive type in open position. Following are some electrical features of these plugs which include:are available in 16 a, 32 a, 63 a, and 125 a ratings, in 3-pin and 5-pin for panel mounting and surface mounting.