What is the MINIMUM number of 27 mm (1 in) rigid PVC Type 2 or metallic conduit that is required to satisfy distribution to each unit?

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You are designing distribution for a seven unit townhouse with in slab conduits.

What is the MINIMUM number of 27 mm (1 in) rigid PVC Type 2 or metallic conduit that is required to satisfy distribution to each unit?
A . Three
B . Four
C . Five
D . Seven
E . Fourteen

Answer: D