Has anyone seen this type of metal piece on a breaker
Circuit breaker lockout.
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Junior’s on it! Lockout.
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Angela,
An appliance that requires an electrical service disconnect, such as an electrical water heater, and is not within the sight of the electrical panel, is required a lockable breaker unless a service disconnect is provided by the appliance. Like others mentioned, the bracket allows you to put a lock on the breaker so nobody could turn it on by accident while a tech is servicing the appliance.
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Thanks for the help
I’m taught to call out those 
square d breakers…
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Good catch! Did they tell you why?
Some people have had issues with them not keeping strong connections. Even if they appear ok, I note
There was a recall on them but only on certain production dates that needs to be verified. The affected breakers may not provide proper AFCI protection. I don’t know about the “keeping strong connections” part 