Description: Undersea Internet Cables - Everything You Need to Know, Inside the Extreme Life of Divers Repairing Billion $ Underwater Cables, How The Internet Travels Across Oceans, Meet Curie, Google’s international fiber optic subsea cable
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A submarine power cable is a major transmission cable for carrying electric power below the surface of the water. These are called "submarine" because they usually carry electric power beneath salt water (arms of the ocean , seas , straits , etc.) but it is also possible to use submarine power cables beneath fresh water (large lakes and rivers ). Examples of the latter exist that connect the mainland with large islands in the St. Lawrence River .
Most power systems use alternating current (AC) . This is due mostly to the ease with which AC voltages may be stepped up and down, by means of a transformer . When the voltage is stepped up, current through the line is reduced, and since resistive losses in the line are proportional to the square of the current, stepping up the voltage significantly reduces the resistive line losses. The lack of a similarly simple and efficient system to perform the same function for DC made DC systems impractical in the l
An electrical cable is made of two or more wires running side by side and bonded, twisted, or braided together to form a single assembly, the ends of which can be connected to two devices, enabling the transfer of electrical signals from one device to the other. Cables are used for a wide range of purposes, and each must be tailored for that purpose. Cables are used extensively in electronic devices for power and signal circuits. Long-distance communication takes place over undersea cables . Power cables ar