Okay, I understand your concern. Working with multi-meter stacks can be tricky. Let's analyze the situation based on your photo and description.

Based on typical multi-meter stack configurations



The main breaker (the leftmost one in the stack) usually kills power to the entire stack of meters to the right of it. This is the most common setup. Each meter position after the main has its own individual breaker/disconnect* The "main" breaker (the leftmost one in your picture) is responsible for the entire stack. Turning that off will kill the power to all the meters.

Therefore, it is extremely likely that flipping the main breaker (leftmost) will kill power to all the meters attached to it.Important Safety Precautions


Double Check the Labeling

Before you do anything, VERY CAREFULLY examine the labeling on the panel. Look for any information about which breaker controls which meter or any overall system description. Sometimes, a diagram or a legend is affixed to the panel door or nearby.2.

Test Before Touching

Even after you flip the breaker,

DO NOT ASSUME it's dead! Use a reliable voltage tester on the wires you'll be working on to confirm that they are de-energized. Test each phase to ground and phase to phase.3. PPE

Wear appropriate Personal Protective Equipment (PPE), including safety glasses and insulated gloves rated for the voltage you'll be working with.4.

Work Permits and Procedures

Always follow any relevant work permits, Lock Out Tag Out (LOTO) and safety procedures required.5.

Have a Second Set of Eyes

It's always a good idea to have a second qualified person present, especially when working with electrical systems.

Disclaimer: I am an AI chatbot and cannot provide professional electrical advice. This information is for general guidance only. You should always consult with a licensed and qualified electrician for any electrical work to ensure it is done safely and in accordance with local codes. Flag for review