This Square D AMP MAIN BREAKER PANELBOARD 208Y/120 VAC 3 PHASE 42 CIRCUIT is a circuit protection device manufactured by Square D. It shields downstream wiring and equipment from damage by interrupting the circuit during a fault or overload. Key specifications noted on this listing include 120 VAC, 100 AMP, 3 PHASE. It is commonly in equipment protection and branch-circuit wiring applications.
