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Can you use individual #6 or #4 gauge THHN wires to connect a 60amp breaker behind drywall and across garage attic without conduit? to connect to 240v Outlet?
Thank you so much.
Branch circuit wiring is required to be installed using one of the suitable wiring methods as provided in Chapter 3 of the NEC. Sections 110.8 and 300.1. The individual conductors mentioned in the question appear to be just run in the open across the garage attic with being installed in a conduit, tubing, or suitable cable assembly. It is also important to hire a qualified licensed electrical contractor for this work and have it inspected by the applicable authority having jurisdiction for Code compliance.
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