APC Metered-by-Outlet with Switching Rack PDU ZeroU 2G power distribution unit 3. APC metered by outlet with switching rack power distribution units (PDUs) enable advanced, user-customizable power control and individual outlet power metering. Remote outlet level controls allow power on/off functionality for power recycling to reboot locked-up equipment and to avoid unauthorized use of individual outlets. Power sequencing delays allow users to define the order in which to power up or down attached equipment. Avoid circuit overload during power recovery and extend uptime of critical equipment by prioritizing the load shedding. Current metering provides real-time remote monitoring of connected loads. User-defined alarms warn of potential circuit overloads before critical IT failures occur.