HP Integrity Superdome SX1000 Safety and Regulatory Information, Eighth Editio - Page 9

Safety and Regulatory Information Disconnect Devices NOTE Specific countries require a derating factor for the wire size when running multiple conductors in the same power cord. It is recommended to use only power cord conductors sized for this derating factor. Table 1-1 Recommended Wire Sizes Current 0-25 Amps 25-32 Amps 32-40 Amps 40-63 Amps 63-80 Amps Wire Size 2.5 mm (14 AWG) 4 mm (12 AWG) 6 mm (10 AWG) 10 mm (8 AWG) 16 mm (6 AWG) Derating Factor 4 mm (12 AWG) 6 mm (10 AWG) 10 mm (8 AWG) 16 mm (6 AWG) 25mm (4 AWG) Disconnect Devices Disconnect devices or circuit breakers must be used to protect the system against abnormal hazards. Table 1-2 details the circuit breaker specifications. Table 1-2 Wall Disconnect Device Circuit Breaker Specification Agency approvals: Interrupt capacity Breaker type Voltage rating Input Source Circuit Interruption Ground UL, CSA, VDE 5,000 amperes Magnetic trip 250V minimum 3-pole+PE, 420V minimum 4-pole+PE 3 pole + PE or 4-pole + PE Simultaneous trip of all poles The protective earth (PE) ground wire is not switched WARNING Provide a disconnect device to protect against abnormal hazards. Systems configured with a full complement of cells, memory, and I/O and connected to a 5-wire source must have a maximum 24A 3-phase with neutral (4-pole) circuit breaker installed as part of the building installation. Systems configured with a full complement of cells, memory, and I/O and connected to a 4-wire source must have a maximum 44A 3-phase (3-pole) circuit breaker installed as part of the building installation. Chapter 1 9