The Clopal 50A 2 Line Phase & Neutral Changeover Switch – 8 Terminal (Large) is a heavy-duty rotary switch designed to safely switch between two power sources (e.g., two electricity meters or grid/generator) in homes, shops, and small industries. It features 8 terminals for switching both phase and neutral lines, ensuring secure, high-load handling capacity with a manual (1-0-2) ON/OFF/ON mechanism.