I managed to pick up a great deal on a CyberPower OR2200LCDRT2U UPS. Unfortunately this box has a NEMA L5-30P input plug (NOT a L5-20P as specified on the product page). In the location I'm trying to set this up, I only have a 15-amp circuit with a 15-amp breaker. Further, it's basically on the opposite side of the house from the breaker, so I suspect that running a dedicated 30-amp line would be prohibitively expensive.
Now I have found that there are adapters you can buy like this or this but I'm not sure if I am creating a fire hazard by using one. Will the breaker trip immediately if my rack draws more than 15 amps of power? Am I at risk of creating arcing by doing this?
I don't expect to be drawing anywhere near the maximum capacity of this system. Just looking to figure out if I'm out of luck if I don't have a 30-amp circuit already present, or if I can safely adapt down to a 15-amp circuit.