OT it looks like two outlets in one of my rooms arent grounded

[EmporerEJ]

Originally Posted by griffin8r

We're still talking past each other here. I'm saying most UPS systems have a MOV-based surge suppression system. Yes, it's true, the equipment stays protected, because the equipment is isolated from the wall by the power supply system, but the power supply system's protection from surge is still a varistor with a limited joule rating, and when that varistor hits its lifetime max, your UPS is toast. Not your equipment, but the UPS itself.

I'm afraid we'll just have to disagree.
The VDR is only one component of a power management system.
If you drop your UPS in a bathtub filled with water, it's toast too.