Discussion
Which of the following joints is used when two wires are to be tapped at the same time?
Answer: A
When two wires are to be tapped from a main wire at the same time, the joint used is the duplex cross tap joint, in which two tap wires are joined to the main wire at one place. An aerial tap joint is used on overhead lines, a Western union joint is a straight joint between two wires, and the Britannia tee joint is a tee joint of a single branch. So the answer is Duplex cross tap joint, option (A). A tap joint of this kind is used in conduit and cleat wiring to supply two branches from one place on the main wire, and the joint is taped to insulate it.
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