An electrical device that plugs into a wall socket to convert a single socket into three, four, five or six sockets. A cube has six sides, but one side of a cube tap must be a plug, so no more than five sockets are technically possible, but some blocks that convert two sockets into six are occasionally referred to as cube taps. The name is derived from the cube-like shape of the plastic socket casing used on most three-outlet cube taps.

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