5.- What size THHN conductor is required to supply a 200 amp. feeder? a) No. 1/0

Question

5.- What size THHN conductor is required to supply a 200 amp. feeder? a) No. 1/0 c) No. 3/0 b) No.2/0 d) No. 4/0 6.- What ground conductor is it necessary for three, No. 3/0 copper conductors per phase, installed in parallel (electrically connected at each end to form a single conductor)? 7.- Determine the ampacity of 4 No. 6 THHN conductors in a conduit at an ambient temperature of 100° F 8.- For a 3000 sq. ft. residential unit with the following loads: 1500 VA dishwasher 800 VA disposal 8000 VA range 5000 VA W.H. 5000 VA dryer 10000 VAA/C . Calculate: a) The feeder conductor size b) The grounding copper conductor size

Explanation / Answer

Problem 5

the 3/0 is the most suitable as it can take 200 AMP load

Hence you can choose option c) 3/0

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