Acceptance testing is the first critical step in verifying proper system operation. During this phase, individual components and devices are tested to identify deficiencies such as loose connections, improper torque values, incorrect wiring, damaged insulation, or defective. This guide covers the basics of pdu construction, applications, testing and maintenance procedures. A power distribution unit (PDU) is a device designed to distribute electric power to servers, networking hardware, telecom equipment, and other devices located within a data center. The rapid expansion of AI-driven data center construction has introduced new challenges to an already demanding electrical testing and commissioning industry. As Data Centers evolve to handle increasing power densities driven by AI, cloud computing, and high-performance applications, PDUs have advanced from simple power strips to intelligent systems offe ing Monitoring, Remote Management, and. This is where Power Distribution Units (PDUs) play a critical role. Modern PDUs are no longer simple power strips. What Is a PDU in a Data. Eaton's engineering services operates professionally independent of Eaton's product manufacturing plants, thus providing an unbiased evaluation of your equipment and meets ANSI/NETA Acceptance Testing Specifications testing organization qualification criteria.