According to 46 CFR, Subchapter J (Electrical Engineering), when considering replacement, instrument and control wiring in a switchboard is to be of what minimum size?

Correct Answer: Option B — 14 AWG

Title 46 CFR Subchapter J specifies that instrument and control wiring within main switchboards must have a minimum size of 14 AWG to ensure adequate mechanical strength and current-carrying capacity against operational stresses.