Help inside circuit breaker box: installing a whole house surge protect via /r/DIY

Help inside circuit breaker box: installing a whole house surge protect

My house was built in the early 70s. We recently had a complementary electrical inspection and the company recommended a whole house surge protector. I looked into it and decided I could save alot of money if I did it myself. I understand the risks involved in electrical work and did extensive research and took every safety precaution.

When I got to actually opening the circuit breaker box, it looked alittle different than I was expecting.

Pictures of inside the box:

Can someone explain physically how the circuit in here is set up? To me, It looks like the buses are connected directly to the main line coming in the house. Yet, the 60-amp circuit breaker in the top left does shut off power to the house. It looked unexpected, so, with a multimeter, I tested the voltage of the left bus in respect to the neutral bus and I got zero. But when I tested the voltage of the right bus, I measured 120V. I switched every single switch off and I would still measure 120V. So, I don't know what's going on there. Can anyone explain?

I thought it might be safe to attach the wires from the surge protector to the breaker before inserting the breaker into the box (was it?), but as I lined up the breaker, I realized that there was no way it was going to fit. This is the one I had bought:

I didn't realize there would be different physical sizes. What kind do I want?

Submitted March 25, 2021 at 02:01PM by amrbean
via reddit

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