A power panel represents the origin point in NetBox for electrical power being disseminated by one or more power feeds. In a data center environment, one power panel often serves a group of racks, with an individual power feed extending to each rack, though this is not always the case. It is common to have two sets of panels and feeds arranged in parallel to provide redundant power to each rack.
Each power panel must be assigned to a site, and may optionally be assigned to a particular rack group.
NetBox does not model the mechanism by which power is delivered to a power panel. Power panels define the root level of the power distribution hierarchy in NetBox.
A power feed represents the distribution of power from a power panel to a particular device, typically a power distribution unit (PDU). The power pot (inlet) on a device can be connected via a cable to a power feed. A power feed may optionally be assigned to a rack to allow more easily tracking the distribution of power among racks.
Each power feed is assigned an operational type (primary or redundant) and one of the following statuses:
Each power feed also defines the electrical characteristics of the circuit which it represents. These include the following:
Supply type (AC or DC)
Phase (single or three-phase)
Maximum utilization (percentage)
The power utilization of a rack is calculated when one or more power feeds are assigned to the rack and connected to devices that draw power.
Example Power Topology