Identifying Voltage

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The first pic, that 2p 125A breaker is straight rated 240V, 22,000AIC. The voltage could be 120/208V, 120/240V, 240V delta, either ungrounded or corner grounded. W/o more information there is no way to tell from the pics what the service voltage is.
 
Can't read anything on the switch, but wouldn't surprise me if the second one isn't 480 or even 600 volts rated, but doesn't mean that is what it is operating at.

Get out a meter and quit guessing;)
 
What is a "solar designer" anyway? You are the third member I have seen use this term.

Assuming that this is a serious question, a solar designer is someone like me who designs photovoltaic (solar) electrical systems that generate energy from sunlight.
 
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