In the illustrated motor controller, what do the contacts across terminals "3" and "4" of the control circuit represent? EL-0017

Correct Answer: Option B — normally-closed overload relay contact

Motor control circuits utilize normally-closed overload relay contacts to provide protective interlocking. These contacts are wired in series with the holding coil; if the thermal element detects an overcurrent condition, the contact opens, de-energizing the coil and dropping out the starter to prevent motor damage from sustained thermal overload.