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(8) #10 THWN-2 & (2) #8 AWG THWN-2 Ground (See 2013 CEC Table 250.122 Conductors in 1" EMT Conduit Min. (6) #10 THWN-2 & (2) #8 AWG THWN-2 Ground (See 2013 CEC Table 250.122 Conductors in 3/4" EMT Conduit Min. Single Line Diagram Max. OCPD: (225A Bus) * (1.2)= 270A Max Rating (120% of Bus) PV Backfeed (50A) + Main Breaker (200A) = (250A 6 270A) See 690.64 (B)(2) of 2013 CEC (8) #10 USE-2 Conductors (See Amp. Calc. A) & (2) #8 Bare Copper Ground (See 2013 CEC Table 250.122 (21) Sunpower SPR245NE-WHT-D Panels (1) String of 11 (1) String of 10 (3) #6 (Ll,L2,Neutral) TH\AN-2 Conductors (See Amp. Calc. C) & (1) #6 AWG THWN-2 Ground in 3/4" EMT conduit min. (See 2013 CEC Table 250.122) -1- Iml T SP 0-New (E)225A Rated Bus PV Breaker to installed on opposite end of Main Breaker. %¢ ***Main Disconnect to be derated from 225A to 200A*** (N)200A Main See Attached Calculations 120/240V r=n g **Modules individually lugged on continuous ground in the event of a JB 2 fpanel being removed from array** - --1 ,-25A r - 2«--* 120A I -fi-- SM --8--AC -f- 0 _@_ INV2 Il 1 11I 'L__rkt:i-k J New 49 50A I OCPD I J LEGEND (16) Sunpower SPR245NE-WHT-D Panels (1) String of 11 (1) String of 5 If the existing Main Service Panel I does not have verifiable ground I electrode. It is the PV contractors responsibility to install asupplemental grounding electrode 1- --- -- Junction Box IRiWI Power-One PVI-4.2-OUTD-S-US-A - with Intergral DC Disconnect (240V) IN921 Power-One PVI-3.8-OUTD-S-US-A 1----1 with Intergral DC Disconnect (240V) Sub-Panel (50A Main Lugged) with (1) 25A & (1) 20A Breaker Solar Loads ONLY Sunrun Meter - Meter Socket Itron I-210+c Smart Meter FAE-1 AC Disconnect "Knife Blade Type" - DU222URB -60A/ 240V Rated riFl Main Panel & Utility Electrical Service L_--1 225A Main/ 225A Bus DC & AC Calculations Ampacity Calculations General Notes: System DC Wiring (Strings of 11) Vmpp = (40.5Vdc mpp) * (11 Panels) = 445.5Vdc Voc= (48.8Voc)*(11 Panels) = 536.8Vdc Vmax= (50.53\0 * (11 Panels) = 555.92Vdc System DC Wiring (Strings of 10) Vmpp = (40.5Vdc mpp) * (10 Panels) = 405Vdc Voc= (48.8Voc) * (10 Panels) = 488Vdc Vmax= (50.53\0 * (10 Panels) = 505.3Vdc System DC Wiring (Strings of 5) Vmpp = (40.5Vdc mpp) *(5 Panels) = 202.5Vdc Voc= (48.8Voc) *(5 Panels) = 244Vdc Vmax= (50.53V) * (5 Panels) = 252.65 Vdc A) PV to Inverters Wire Ampacity Themnal Derate Factor Number ofConductors 2013 CEC(310.16)(CEC 310.16)CEC 310.15(B)(2*a) #10 USE-2,90 degrees C 50 + (22) degrees C (7-9) Max 310.15(B)(3XC) (40 Amps)70.58) .(0.70) (40 Amps)·(0.58)·(0.70)=16.24A >PVA-design (10.03A) B) Inverters to Sub-Panel Wire Ampadty Thermal Derate Factor Number of Conductors 2013 CEC(310.16)(CEC 310.16)CEC 310.15(B)(2)(a) #10 THWN-2, 90 degrees C 50 degrees C (4-6) Max 1. (37) Sunpower SPR245NE-WHT-D Modules: (245) Watt Modules wired and listed to UL1703 standards 2. (1) Power-One PVI-3.8-OUTD-S-US-A & Power-One PVI-4.2-OUTD-S-US-A Inverters . Attached with system electrical specifications and ground fault protected & listed to UL1741 standards. 3. Photovoltaic system ground will be tied into existing ground at main service from DC Disconnect/Inverter as per NEC Sec. 250.166(B). "The Grounding Electrode Conductor shall not be smaller than the largest conductor supplied by the system and not smaller than #6AWG." 4. Equipment operating 150 volts or greater shall only be serviced or replaced by qualified personnel. Field protection may be in the form of conduit, dosed cabinet or an enclosure which requires use of tools to open. * Prolected Maximum System Voltage @ Extreme Min. Temp: -2°C (25°C - -2°C) x -0.132V = 3.564% Per°C (48.8 V) x (3.564%) = 1.739V + 48.8V = 50.53V * Projected Minimum System Voltage {40.5 V - ((25° - (29°C + 22°)) x -0.132)} = 37.06 V (37.06 V) x (String of 7) = 259.42 V @ Avg High Temp: 29°C Imp = (6.05A) * (1 String) = 6.05A (40Amps)*(0.82) *(0.80) (40Amps) * (0.82) * (0.80) = 26.24A > PV 8-desiqn (25A) C) Sub-Panel to Main Service Panel Wire Ampacity Thermal Derate Factor Number of Conductors 2013 CEC(310.16)(CEC 310.16)CEC 310.1(B)(2)(a) #6 THWN-2,90 degrees C 50 degrees C (3) Max 5. Solar Photovoltaic System equipment will be installed in accordance with requirements of Art. 690 of the 2013 CEC. 6.Minimum height of conduit above roof to match temperature derating factor. 7.Photovoltaic DC conductors entering the building shall be installed in metallic raceway and shall be identified every 10 feet - and within 1 foot above and below penetrations of roof/ceiling assemblies, walls, or barriers -- with minimum 3/8-inch-high white lettering on red background reading:"WARNING: PHOTOVOLTAIC POWER SOURCE" Isc = (6.43A) * (1 String) = 6.43A . 8. System Grounding Electrode conductor for PV system to be sized to meet the requirements of both 250.66 (AC) and 250.66 A-design = (6.43A) * (1.56) = 10.03A ------> USE-2 #10 (75Amps)*(0.82) *(1.00)(DC), 690.47(C) not smaller than #6 CU AWG. System AC Wiring - INV1 Pmax= (225.5 PTC Rating) * ( 21 Panels) * (96% Inv. eff.) = 4546.( Imp= (4546.08 Wac) / (240Vac) = 18.94A Inverter Maximum Output Current = 20A B-design = (20A) * (1.25) = 25A #10 THWN-2 (25A C/B) System AC Wiring - INV2 Pmax= (225.5 PTC Rating) * ( 16 Panels) * (96% Inv. eff.)= 3463.6 Imp= (3463.68 Wac) / (240Vac) = 14.43A Inverter Maximum Output Current = 16A B-design = (16A) * (1.25) = 20A #10 THWN-2 (20A C/B) (75Amps) * (0.82) * (1.00) = 61.5A > PV C-design (50A) )8 Wac TOTAL System AC Wiring 8 Wac Pmax= (4546.08 Wac) + (3463.68 Wac) = 8009.76 Wac Imp= (8009.76 Wac) / (240Vac) = 33.37A Inverter Maximum Output Current = (20A) + (16A) = 36A C-design = (36A) * (1.25) = 45A #6 THWN-2 (50A C/B) 9. If the existing main service panel does not have a ground rod or ufer, it is the pv contractors responsibility install one. 10. Smoke alarms and carbon monoxide detectors will meet the necessary requirements per CRC R314, R315 Project Doan Sheet 11. UTILITY COMPANY WILL BE NOTIFIED PRIOR TO ACTIVATION OF THE SOLAR PV SYSTEM.Date 05/21/2014 Scale As Noted PV412.Terminals of the disconnecting means may be energized in the open position. Drawn4 JR/DA INO. Kevision/issue uate 1-01-ID 4,04 /-9.