You can't just change the breaker and plug to 20A. You need to:
- read the rating on the equipment
- count how many outlets are on that circuit.
- check how the circuit is wired
- read the rating on the equipment
A 20A circuit can't carry more than 16A load. UPS is a constant load, and required de-rating of the circuit to 80%
- count how many outlets are on that circuit.
5 outlets = 900VA=7.5A@120V load on the circuit, before you add any equipment.
I had one circuit shared between two offices with 13 outlets = 2340VA = 19.5A on a 20A circuit, _before_ any equipment is plugged in.
- check how the circuit is wired
What gauge wire? Should be 12AWG in residential. 10AWG in commercial.
Three-phase? Shared neutral? How is the neutral loaded?
