There are many reasons not to approach the breaker panel in the data center, but to use a circuit-tracker instead. PDU Cables published an article by Ken Koty, former data center facilities manager. The recommendations in the article are well worth learning from and offer a series of recommendations for the design and maintenance of this potentially dangerous business in data center power. How to ensure that the server shutdown off accurate service circuit? Ken describes the process of disconnecting the equipment and removing the power cord, and it is recommended that you test the circuit breaker for electrical current before closing the circuit board. This is to ensure that the circuit that is not in use is switched off. Ken discusses the effect of using a clamp meter or Amp check tool to track the data center equipment breaker panel current. However, the problem with the circuit breaker panel can only be handled by a licensed electrician , even if it is just an operation of adding a clamp meter. Installing a clamp meter can mess up the wires. If the panel wire just loosens, it may be dropped, accidentally or without warning hit the circuit. A licensed electrician should tighten all cables before adding a clamp meter to any of the cables. Many breaker panels are installed on power distribution units (PDUs) or power management modules. Multiple panels may have too high current levels, and arc flash hazard warning signs are required. However, these warning signs are not normally installed where they are needed. This is one of the reasons why professional electricians are required to deal with electrical equipment problems. Also note that in the data center, work only with the electrician who is most familiar with installing and understanding the critical nature of computer operations. If an arc flash may occur, it is a good idea to turn off the entire panel or PDU. The electrician can wear a flash-resistant garment that looks very much like a spacesuit. Circuit trackers are an effective alternative to detecting circuit conditions before closing the associated circuit breakers. The circuit tracker is easy to use, allowing you to check the current before closing the circuit breaker. Reliable circuit breakers enable fast, easy and safe identification and monitoring of problems before switching off the circuit. Modern data center power best practices Data center power design is evolving to help protect workers and equipment. In traditional data centers, the obsolete circuitry must be removed so that it is safer to open the panel and tighten the cable. In the power design of most modern data centers, the need to remove old circuits is low. Each rack and cabinet has a dual power supply, usually three-phase configuration, and the installation complies with building codes. If these circuits are not in use, they do not need to be removed. The power busbar system also allows for the safe installation and removal of the circuit without the need for electrical assistance through a clearly identifiable plug-in module.