We have two server cabinets that have 4 powerboards mounted. Each powerboard has 8 outlets. I have two new devices that need to be plugged into the power but there is no available power point as these are all used by the PDUs and they have no available outlets for the new devices. Would it be safe to add another PDU to the existing PDU? What would you guys do if there is no power points and PDUs are fully used by other devices?