American Power Conversion 250 A - Manual (Page 88)

Smart Distribution Panel with ATS
78 InfraStruXure Power Generation System
Installation and Wiring 208V 480V
Maximum Utility Input Over-current
Protection Required 225 A UL-listed Breaker (50 kAIC)
Utility Input Connection Type 4W + G 3W + G or 4W+G
Size of upstream utility circuit breaker 250 A 200 A
Recommended wire size if 30°C
†
4/0 AWG 3/0 AWG
Recommended wire size if 40°C
†
300 kcmil 3/0 AWG
Recommended protective earth size
†
4 AWG 6 AWG
Generator Input Connection Type 4W + G 3W + G or 4W+G
Output power of generator 80 kW 125 kW
Size of generator output breaker 250 A 200 A
Recommended wire size if 30°C
†
4/0 AWG 3/0 AWG
Recommended wire size if 40°C
†
300 kcmil 3/0 AWG
Recommended protective earth size
†
4 AWG 6 AWG
Supply to Generator Heater and Charger Hard-wire from transformer in ATS to double duplex NEMA
5-20 outlet box on generator
Recommended wire size
†
Two 12 AWG stranded copper
Voltage 120 VAC
Installation type Floorstanding secured to wall (concrete screws included)
Input/Output Cabling Top and bottom routing
Rear Access Required No
NEC Access Clearances • Three feet to an insulated surface
• Three feet to grounded parts, including concrete walls, if 208/120 V
• 3 1/2 feet to grounded parts, including concrete walls, if 480/277 V
• Three feet to other live parts, if 208/120 V
• Four feet to other live parts, if 480/277 V
†
Always follow the National Electrical Code (NFPA 75) or the Canadian Electrical Code (CSA C22.1-02) and local codes when
installing the InfraStruXure Power Generation System. The AC Power Input wire sizes provided in this document are recommendations
only. The ATS is provided with a panel board to supply power to multiple loads. Since loading could increase after the product’s initial
installation, the AC Power Input wires were selected for the maximum current that can be delivered by the panel board. If the ATS is
purchased to supply a calculated load rated less than the panel board, and the load will never increase, smaller wires can be used if the
requirements specified in the NEC, the CEC, and local codes are followed.
††
Wire sizes to loads shall be in accordance with the ratings of the circuit breakers selected to power the loads.