Isolation?

99% (not exact) of monitors need an ISO. Never ever plug it into direct 120v without being sure. If you believe you have one of the few monitors that doesn't require one, then consult the manual for the monitor. Monitor manuals are available in .pdf on a lot of websites. The best rule of thumb is: If your current monitor is plugged into one, then it requires one.
 
99% (not exact) of monitors need an ISO. Never ever plug it into direct 120v without being sure. If you believe you have one of the few monitors that doesn't require one, then consult the manual for the monitor. Monitor manuals are available in .pdf on a lot of websites. The best rule of thumb is: If your current monitor is plugged into one, then it requires one.

There is a transformer for the monitor and one coming in from the machine...
 
Alright i guess ill try and squeeze it in then.
Without the iso, it is possible under the right circumstances for the chassis of the monitor to become charged. If the chassis was touched while your body had a path to ground, you could have a pretty bad day. You have made a safe choice.
 
99% (not exact) of monitors need an ISO. Never ever plug it into direct 120v without being sure. If you believe you have one of the few monitors that doesn't require one, then consult the manual for the monitor. Monitor manuals are available in .pdf on a lot of websites. The best rule of thumb is: If your current monitor is plugged into one, then it requires one.

What are the 1% of monitors that don't need one?

Edit: Nevermind, did some digging, found what I was looking for.
 
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It protects you against power surges.

No, it doesn't.

What it does is protect equipment and people by separating the operating voltage or your monitor (which may have a hot chassis) from the ground of your mains power. It basically keeps the power separated so there cannot be a high potential between the monitor and the ground the game or test equipment might use.

You need a power surge protector to protect against power surges. :D
 
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