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Extra info for A Guide to Photovoltaic (PV) System Design and Installation
Material: Page 29 EX-4 PV Installation Guide PV System Power Conditioning Unit + + + + + - - - - + + + + + - - - - + + + + + - - - - + + + + + - - - - - PV Circuit Combiner #10-2 conductor TC with THWN-2 conductors for all PV array wiring Photovoltaic Modules Continuous Equipment Ground Disconnect and GroundFault Protection 60 A DC+ POS DC/AC Inverter 1A 15 A, 5 plcs. AC In DCSurge Arrestor 20 A Inverter AC Disconnect NEG Existing Exterior Main Breaker Box 20 A Exterior PG&E Disconnect Box 30 A PV Array Grounding Conductor 3/4” EMT Conduit w/ #10 AWG THWN conductors Surge Arrestor Main House Grounding System Notes: 1.
6 19 25 31 39 50 62 80 112 189 Ampacity of 90 C Wet Wire Roof Mounted Modules (80 C) Ampacity of 90 C Wet Wire Rack Mounted Modules (70 C) Ampacity of 75 C Wet Wire Rack Mounted Modules (70 C) 10 12 16 23 31 39 N/A N/A N/A N/A N/A N/A N/A N/A N/A 15 17 23 32 44 55 N/A N/A N/A N/A N/A N/A N/A N/A N/A 7 8 12 17 21 28 N/A N/A N/A N/A N/A N/A N/A N/A N/A Ampacity of Ampacity of Ampacity of 90 C Wet Wire 75 C Wet Wire 60 C Wet Wire BOS Wiring (45 C) BOS Wiring (45 C) BOS Wiring (45 C) 22 26 35 48 65 83 96 113 131 148 170 196 226 278 374 To determine D-Factor for 1% voltage drop simply multiply D-Factor from 3% tables by 3.
5. 9 for 3%.
A Guide to Photovoltaic (PV) System Design and Installation