A rack for housing electrically powered components, the rack including: a power distribution bus configured to distribute AC power among components installed in the rack via direct coupling without cables; a plurality of slots, each slot configured to receive a component; and one or more components, each component installed in one of the plurality of slots, each component directly coupled to the power distribution bus without a cable, at least one of the components comprising an inter-rack power distribution unit (‘PDU’) configured to provide AC power to other components installed in the rack via the power distribution bus.