Eruv — can they be tested electrically for continuity?

I’m not Jewish, but my Mennonite culture gives me an appreciation and sympathy for your Orthodox culture.

I was reading how the Eruv that encircles Manhattan is inspected visually prior to every Sabbath, to ensure that it’s intact. Wouldn’t it be possible to do a quick Ohm test on the wire instead, to confirm that there’s no breaks in the circuit?

That’s what we do for buried dog fences, surround large estates. If there’s no continuity in the wire, we chase down the issue further. But if there is continuity, then it saves a lot of time in troubleshooting.