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MAX PV VOLTAGE & CURRENT CALC'S: BRANCH CIRCUIT MAX VOLTAGE: 208.OVAC MAX PV CURRENT PER NEC.690.8(A)(3) 1.25X MAX AC OUTPUT CURRENT X # OF INVERTERS PER STRING 1.25 X 1.83 X 15 = 34.31A 1.25 X 1.83 X 13 = 29.73A 1.25 X 1.83 X 10 = 22.87A AC CONDUCTOR AMPACITY CALCULATIONS: FROM ROOF TOP JUNCTION BOX TO LOAD CENTER: AMBIENT TEMPERATURE ADJUSTMENT FOR EXPOSED CONDUIT PER NEC 310.15(B)(2)(C): -10° EXPECTED WIRE TEMP (*C): 30° TEMP CORRECTION PER TABLE 310.16: 1 # OF CURRENT CARRYING CONDUCTORS: 16 CONDUIT FILL CORRECTION PER NEC.310.15(13)(2)(a): 0.5 CIRCUIT CONDUCTOR SIZE: 10AWG CIRCUIT CONDUCTOR AMPACITY: 40A REQUIRED CIRCUIT CONDUCTOR AMPACITY PER NEC.690.8(A&B): 1.25 X MAX AC OUTPUT CURRENT X # OF INVERTERS PER STRING 1.25X1.83X15=34.31A 1.25 X 1.83 X 13 = 29.73A 1.25 X 1.83 X 10 = 22.87A DERATED AMPACITY OF CIRCUIT CONDUCTOR PER NEC TABLE 310.16 TEMP CORR. PER NEC TABLE 310.16X CONDUIT FILL CORR. PER NEC 310.15(B)(2)(a) XCIRCUIT CONDUCTOR AMPACITY = 1 X0.5X40=20A AC CONDUCTOR AMPACITY CALCULATIONS: FROM LOAD CENTER TO MSP: EXPECTED WIRE TEMP ('C): 30° TEMP CORRECTION PER TABLE 310.16: 1 CIRCUIT CONDUCTOR SIZE: 1 AWG CIRCUIT CONDUCTOR AMPACITY: 145A # OF CURRENT CARRYING CONDUCTOR: 3 CONDUIT FILL PER NEC 310.15(B)(2)(a): 1 OUTPUT CURRENT OF INVERTER X TOTAL NUMBER OF INVERTERS 1.25 X 1.83 X 96 = 219.60A DERATED AMPACITY OF CIRCUIT CONDUCTOR PER NEC TABLE 310.16 TEMP CORR. PER NEC TABLE 310.16 X CONDUIT FILL CORR. PER NEC 310.15(B)(2)(a) XCIRCUIT CONDUCTOR AMPACITY = 1 X 1 X 145 = 145A INTERNAL VOLTAGE RISE WITHIN THE ENGAGE CABLES: PER ENPHASE TABLE: BRANCH CIRCUIT OF 15 = 1.38% BRANCH CIRCUIT OF 13 = 1.06% BRANCH CIRCUIT OF 10 = 0.65% VOLTAGE RISE FROM THE ARRAY MOUNTED JUNCTION BOX TO LOAD CENTER: VRISE _ (AMPS/INVERTER * #OF INVERTER)* (RESISTANCE Q/FT) * (2 WAY WIRE LENGTH VRise = (1.83A*15) * (0.001290/ft)�2* (20ft X 2) VRise = 1.416V VRise = 1.416V/208V = 0.59% Vrise VOLTAGE RISE FROM LOAD CENTER TO MAIN SERVICE PANEL: Vrise = (SUM OF STRING CURRENT) * (RESISTANCE f2/FT) * (2 WAY WIRE LENGTH) VRise = (1.83 X96) * (0. 000 1 600/FT) * (20 X 2) VRise = 1.124 VRise = 1.124V/208V = 0.47% SUMMARY OF CALCULATIONS FOR 208VAC APPLICATIONS: 1.38 + 0.59 + 0.47 = 2.44% 2.44%<2%=OK -t s a NYr�S►�� * No 89045 STATE OF AL �� III%I\ � VOLTAGE RISE FROM THE ARRAY MOUNTED JUNCTION BOX TO LOAD CENTER: VRISE _ (AMPS/INVERTER * #OF INVERTER)* (RESISTANCE.Q/FT) * (2 WAY WIRE LENGTH VRise = (1. 83A* 13) * (0. 00 1 290/ft) * (20ft X 2) VRise=1.227V VRise = 1.227V/208V = 0.511 % Vrise VOLTAGE RISE FROM LOAD CENTER TO MAIN SERVICE PANEL: Vrise = (SUM OF STRING CURRENT)'` (RESISTANCE Q/FT) * (2 WAY WIRE LENGTH) VRise = (1.83 X96) * (0.0001600/FT) * (20 X 2) VRise = 1.124 VRise = 1.124V/208V = 0.47% SUMMARY OF CALCULATIONS FOR 208VAC APPLICATIONS: 1.06+0.511 +0.47=2.0% 2.0%<2%=OK TAMPA BAY . " R • i POWU*C THESlNVSFI STATE 6002 E. ADAMO DR., TAMPA, FL,33619 PH. NO.: (813) 398-3687 Email : info@tampabaysolar.com REVISIONS DESCRIPTION DATE REV 01/15/2024 #1 SETBACK GIVEN 01/17/2024 #2 CHANGED 02/13/2024 #3 CALCULATION ADDED 02/15/2024 #4 ------------ SIGNATURE WITH SEAL DATE: 02/15/2024 PROJECT NAME &ADDRESS V Z N 0 Mt Lo "M J0 M LL Q m m J � J _j WU Q � �a � N 0 I SHEET NAME WARNING LABELS & PLACARDS SHEET SIZE ANSI B 11" X 17" SHEET NUMBER PV-5