what is ground reference in twisted pair cable
Twisted pair Twisted pair cables often incorporate shielding in an attempt to prevent electromagnetic interference. Shielding provides an electrically conductive barrier to attenuate electromagnetic waves external to the shield; and provides a conduction path by which induced currents can be circulated and returned to the source via ground reference connection.
Ethernet over twisted pair All these standards use 8P8C connectors,[b] and the cables from Cat 3 to Cat 8 have four pairs of wires; though 10BASE-T and 100BASE-TX only use two of the pairs.
AS/NZS 3112 The plug pictured on the left, as used in Australia, New Zealand, Fiji, Papua New Guinea and many Pacific Island countries, has two flat pins forming an inverted V-shape plus a vertical earthing pin. These flat blades measure 6.35 by 1.6 mm (1⁄4 by 1⁄16 in) with the Active and Neutral pins 17.35 mm (11⁄16 in) long set 30° to the vertical and the vertical Earth pin being 20 mm (0.787 in) in length.[2] The pins are arranged at 120° angles around a common midpoint, with the Active and Neutral centred 7.92 mm (5⁄16 in) from the midpoint, and the Earth pin centred 10.31 mm (3⁄8 in) away.[2]
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