Specifications
Specifications: ATS with Power Distribution
76 Automatic Transfer Switch with Power Distribution
Installation and Wiring 208V 480V
Maximum Utility Mains Input Over-current
Protection Required
225A UL-listed Breaker (50kAIC)
Utility Mains Input Connection Type 4W + G 3W + G or 4W+G
Size of upstream utility circuit breaker 250A 200A
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
†
2AWG 4AWG
Generator Input Connection Type 4W + G 3W + G or 4W+G
Output power of generator 80kW 125kW
Size of generator output breaker 250A 200A
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
†
2AWG 4AWG
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, 12AWG stranded copper
Vo lt a g e
120VAC
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 208/120V
• Three and a half feet to grounded parts, including concrete walls, if
480/277V
• Three feet to other live parts, if 208/120V
• Four feet to other live parts, if 208/120V
†
Always follow the National Electric Code (NFPA 75) or the Canadian Electric 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 in the NEC, 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.