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The insulation between windings and grounded core and the insulation between the windings of the same phase is
Thickness of 8 tyres L, M, N, O, P, Q, R and S is compared. Thickness of no two tyres is same. Thickness of N is more than L but less than 6 tyres. Thickness of O is more than M but less than Q. Thickness of P is less than only two tyres. Thickness of Q is not more than P. Which of the following statement is not correct?
In which type of windings extra insulation between layer is required in addition to the insulation of conductors.