C120-H007-05EN xi
Contents
Tab le sTable 2.1 Ceiling heights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 2.2 Raised floor heights of free-access floors. . . . . . . . . . . . . . . . . . . . . . . 18
Table 2.3 Strengths and surface materials of free-access floor panels . . . . . . 19
Table 3.1 Kinds, uses, and locations of power supply facilities . . . . . . . . . . . . . 30
Table 4.1 Recommended temperatures and humidities for computer rooms . 40
Table 4.2 Temperature and humidity recommendations (changing the room
temperature) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 4.3 Temperature and humidity recommendations (lowering the underfloor
temperature) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 4.4 Tolerable limits for corrosive gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 4.5 Sources of overload and amount of heat dissipation . . . . . . . . . . . . . 45
Table 4.6 Examples of typical air conditioner cooling capacity calculations . . 47
Table 4.7 Examples of underfloor-ventilation air conditioner cooling capacity
calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 4.8 Convenient formulas for air conditioner capacity. . . . . . . . . . . . . . . . . 50
Table 5.1 Sources of magnetic fields and fault symptoms. . . . . . . . . . . . . . . . . . 60
Table 6.1 Input power requirement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 6.2 Types of available power supply facilities and usage. . . . . . . . . . . . . 67
Table 6.3 Transformers for 200 V server systems. . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 6.4 Transformers dedicated to 400 V server systems. . . . . . . . . . . . . . . . 71
Table 6.5 Specification of the grounding trunk cable for server systems
(in the buildings complying to the IEC standards) . . . . . . . . . . . . . . . 78
Table 6.6 Requirements for other equipment grounding facilities . . . . . . . . . . . 79
Table 6.7 Details of the separation of the LAN transmission line signal
ground (SG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 6.8 Output terminal board dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 7.1 Specification of power control box (F9710PW2) . . . . . . . . . . . . . . . . . 92
Table 7.2 Recommended surge absorber for external modem. . . . . . . . . . . . . . 94
Table 8.1 Characteristics of fire extinguishing agents . . . . . . . . . . . . . . . . . . . . . 99
Table A.1 Units-of-measure conversion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Table A.2 Fractions to decimal-equivalent conversion . . . . . . . . . . . . . . . . . . . . . 108