I'm looking in 551, but not seeing how to size the OCPD for each site.

The reason I'm asking is that today I was troubleshooting a power issue at a site that was a 30/20.

I wasn't able to find the breaker for the site (nothing was labeled) so I used my circuit tracer and it led me to a 2-pole 60 .

turns out the adjacent site was the other half of the breaker.

I was expecting to find a 1-pole 30 but there were none.

Then I thought maybe there'd be a 2-pole 30 and maybe the 2 sites would be sharing the neutral.

I was surprised to see a 2-60. Would this be normal?

What would determine how to size the OCPD for sites?

The reason I'm asking is that today I was troubleshooting a power issue at a site that was a 30/20.

I wasn't able to find the breaker for the site (nothing was labeled) so I used my circuit tracer and it led me to a 2-pole 60 .

turns out the adjacent site was the other half of the breaker.

I was expecting to find a 1-pole 30 but there were none.

Then I thought maybe there'd be a 2-pole 30 and maybe the 2 sites would be sharing the neutral.

I was surprised to see a 2-60. Would this be normal?

What would determine how to size the OCPD for sites?

## Comment