portion of the condut above the roof cannot exceed what lengh In the figure below, a condut with a balanced three-phase sucply us troma The total leng of conduit trom DS to HAC unit is 90 To met NEC cod the disconnect swtch DS located in an office area to the HAC unt on the oot 28 Roof line HVAC Disconnect Sw 10

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Star Delta Conversion

Find the input resistance between points A and B of the following resistive network: