American Power Conversion 250 A manual Installation and Wiring 208V 480V, Awg

Smart Distribution Panel with ATS

Installation and Wiring	208V	480V
Maximum Utility Input Over-current	225 A UL-listed Breaker (50kAIC)
Protection Required
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† Voltage

Installation type Input/Output Cabling Rear Access Required NEC Access Clearances

Two 12 AWG stranded copper

120 VAC

Floorstanding secured to wall (concrete screws included) Top and bottom routing

No

•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.

78 InfraStruXure Power Generation System