Electrical code and UPS backed circuits?

Question

I want to modify one of the electrical circuits in my house to run on a battery backup. To do this I want to break the circuit between the breaker box and the first outlet on the circuit and install onto the cut ends a standard outlet and plug. Into the outlet (leading back to the breaker box) I'd attach a large, true-sine output UPS. Into the UPS's battery-backed outlet I'd attache the plug (leading to the outlets and one overhead light). The UPS is rated for the full 20 amp load provided by the circut.

I know that this will work, but I am concerned about electrical code requirements. I realize this varies by locality (I'm in Omaha Nebraska), but I want to know if this is plan can possibly pass requirements.

Answer 1

The code requires over-current protection.
If it's not built into your UPS, you need a
20 A. single pole breaker downstream of the
UPS to interrupt any short.
(Most UPS systems are current limited, but
you don't want to continue feeding power at
any level into a fault.)

Be sure to maintain the continuity of the
ground wire and connect the UPS ground to it..

Answer 2

I agree with @Irv S.. You can also refer on this site http://www.eeweb.com/blog/circuit_projects/simple-cell-phone-jammer for more info..