Reliable electrical power is required for the proper functioning of your data processing equipment.
IBM® information technology equipment requires a reliable electrical power source that is free from interference or disturbance. Electrical power companies generally supply power of sufficient quality. The Power quality, Voltage and frequency limits, Power load, and Power source topics provide the guidance and specifications needed to meet the requirements of the equipment. Qualified personnel must ensure that electrical power distribution system is safe and meets local and national codes. They must also ensure that the voltage measured at the power receptacle is within the specified tolerance for the equipment. In addition, a separate power feeder is required for items such as lighting and air conditioning. A properly installed electrical power system will help to provide for reliable operation of your IBM equipment.
Other factors to consider when planning and installing the electrical system include a means of providing a low impedance conducting path to ground (path to earth) and lightning protection. Depending on the geographical location, special considerations may be required for lightning protection. Your electrical contractor should meet all local and national electrical code requirements. Building electrical power is normally derived from a three-phase power distribution system. General office areas are normally provided with single-phase power outlets, and data processing rooms are provided with three-phase power.
Some IBM IT equipment and devices may require standard three-phase power; others may require single-phase power. The power requirements for each device are specified in the individual system specifications for that system. Nominal voltage, plugs, receptacles, and in some cases, conduit and back boxes are listed in the specific system specifications. Refer to the respective system specifications to determine the power requirements. Ensure that existing branch circuit outlets are the correct type and are properly grounded.