Disconnect?

[Robert Jones]

Pic was sent to me so I have no background info. Looks like a disconnect of some sort, just have not seen one like this in a residential home. I was told that there is an actual panel below this. Was told the three black circles are plastic. Is it a main pull out disconnect or...?

Thanks.

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[kurt]

Looks like a pullout knife switch, or maybe a cartridge.

Most likely the main disconnect.

[Jerry Simon]

Main cartridge disco

[Jim Katen]

Yes, it's a big fuse block.

[Rob Amaral]

Main disconnect ... that is not an abnormal thing to see in the East..