T0A08:Where should a fuse or circuit breaker be installed in a 120V AC power circuit?
Direct answer summary (2026-2030 NCVEC pool)
The official correct answer for T0A08 is In series with the hot conductor only.
The key fact is In series with the hot conductor only. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.