I am adding a dedicated 20 amp 120/240 V single phase branch circuit to a UPS in an ITE room. Can I design a relay circuit to disconnect this branch circuit to comply with 645.10? I want to add a second power off button in this room that will energize a 24 volt relay to open the ungrounded line supplying the UPS. The relay control circuit is located outside of the ITE room. Thank you.