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