Can we put the unfused service wires and branch circuits in the same trough? Can unfused wire ever be in the same raceway as branch circuits / feeders?
230.7 Other Conductors in Raceway or Cable. Conductors other than service conductors shall not be installed in the same service raceway or service cable.
I hesitate to say "No" to "unfused" in general as there may be some instances where some "unfused" conductors can share a wireway. A review of Art 725, 800 and others might show some instances.