The number of outlets can vary as much as the equipment in your enclosure. Often the number of outlets, or receptacles, on a PDU is dependent on the number of pieces of equipment in an enclosure that need power. It is also suggested that potential future growth should be considered when looking at PDU options. Eaton offers many standard offerings for common output requirements. Horizontal units are limited in the number of receptacles that can be put in the PDU since they are limited by rack width, while the longer, vertical units can offer more receptacles.