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PV MODULE RATINGS
<br />BRAND AND MODEL:
<br />CANADIAN SOLAR
<br />CS3W-450MB-AG
<br />MAX POWER [Pmax] (w): 450
<br />MAX POWER-POINT
<br />VOLTAGE [Vmp] (V): 41.10
<br />OPEN CIRCUIT VOLTAGE
<br />[Voc] (V): 49.10
<br />MAX POWER-POINT
<br />CURRENT [Imp] (A): 10.96
<br />SHORT CIRCUIT CURRENT
<br />[Isc] (A): 11.60
<br />MAX SERIES FUSE [OCPD]
<br />(A): 25
<br />MAX SYSTEM VOLTAGE (V): 1500
<br />PV SYSTEM RATINGS
<br />NOMINAL SYSTEM VOLTAGE (V): 240Vac
<br />AC INVERTER OUTPUT (A): 25.65
<br />OPERATING TEMP (°C) -7° TO 39°C
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<br />Page
<br />Title Block 11x17
<br />NOTES:
<br />1- ALL METALLIC RACEWAYS AND EQUIPMENT SHALL BE BONDED AND ELECTRICALLY
<br />CONTINUOUS (NEC 250.90, 250.96).
<br />2- FOR SYSTEMS WITH CIRCUITS OVER 250V, GROUND BUSHINGS ARE REQUIRED
<br />AROUND PRE-PUNCHED CONCENTRIC KNOCKOUTS (NEC 250.97)
<br />3- THE GROUNDING ELECTRODE CONDUCTOR WILL BE CONTINUOUS, EXCEPT FOR
<br />SPLICES OR JOINTS AT BUSBARS WITHIN LISTED EQUIPMENT. (NEC 250.64(C))
<br />4- THE EQUIPMENT GROUNDING CONDUCTOR MAY BE USED AS A GROUNDING
<br />ELECTRODE CONDUCTOR VIA EXCEPTION AS PROVIDED IN NEC 250.121. A WIRE-TYPE
<br />EGC INSTALLED IN COMPLIANCE WITH 250.6(A), II, III, VI.)
<br />5-INSTALLER TO IDENTIFY THE EXISTING GROUNDING ELECTRODE TYPE (I.E. DRIVEN
<br />ROD, UFER, WATER PIPE, OR COMBINATION OF SOME
<br />OR ALL OF THE PREVIOUSLY MENTIONED). IN EXISTING ELECTRICAL SYSTEMS THAT
<br />USE ONLY A WATER PIPING GROUNDING ELECTRODE SYSTEM, AN ADDITIONAL
<br />GROUNDING ELECTRODE (I.E DRIVEN ROD) SHALL BE PROVIDED. (NEC 250.50)
<br />-PER NEC 250.53(A)(2), A SINGLE ROD, PIPE, OR PLATE ELECTRODE SHALL BE
<br />SUPPLEMENTED BY AN ADDITIONAL ELECTRODE OF TYPE SPECIFIED IN 250.52(A)(2)
<br />THROUGH (A)(8) SPACED NO LESS THAN 6FT APART. GEC ROD SHALL NOT BE
<br />SMALLER THAN 5/8" DIAMETER, BE NOT LESS THAN 8FT IN CONTACT WITH SOIL, AND
<br />BE OF STAINLESS STEEL, COPPER, OR ZINC COATED STEEL. GEC PIPE OR CONDUIT
<br />SHALL NOT BE LESS THAN 3/4".
<br />EXCEPTION, IF A SINGLE ROD, PIPE OR PLATE GROUNDING ELECTRODE HAS A
<br />RESISTANCE TO EARTH OF 25 OHMS OR LESS, THE SUPPLEMENTAL ELECTRODE
<br />SHALL NOT BE REQUIRED.
<br />-#4 AWG CU TO UNDERGROUND METAL WATER PIPE THAT IS A MINIMUM 10 FOOT
<br />BURIAL IN PIPE LENGTH. CONNECT GROUNDING ELECTRODE CONDUCTOR WITHIN
<br />FIVE FEET OF WHERE IT ENTERS BUILDING. 250.52(A)(1), 250.68(C).
<br />-ADDITIONAL #4 AWG CONNECTION TO UFER IF AVAILABLE PER 250.66. IF UFER NOT
<br />AVAILABLE THEN TWO #6 AWG CU CONNECTIONS TO GROUND RODS SEPARATED BY
<br />AT LEAST 6 FT IS NEEDED 250.53.
<br />MICRO INVERTER INPUT (DC SIDE)
<br />VOLTAGE: 49.10 x 1.14 x 1 = 55.97V ≤ 60V OK
<br />SHORT CIRCUIT: 11.60 x 1.25 = 14.50A < 15A OK
<br />WIRE CHECK FROM ABOVE TABLE
<br />ENPHASE Q CABLE CONTAINS (2) #12 THWN-2 AWG WIRES: 20.40A < 30A OK
<br />MAXIMUM VOLTAGE & VOLTAGE CORRECTION FACTOR
<br />(DC SIDE) [NEC 690.7]
<br />LOWEST EXPECTED AMBIENT
<br />TEMPERATURE (°C):-7°C
<br />VOLTAGE CORRECTION FACTOR:1.14
<br />MODULE OPEN CIRCUIT VOLTAGE:49.10
<br />MODULES PER INPUT:1
<br />ADJUSTED VOLTAGE:55.97V
<br />MAXIMUM VOLTAGE: 60V
<br />INVERTER VALUES: INVERTER 1
<br />BRAND AND MODEL:
<br />ENPHASE
<br />IQ8M-60-72-US
<br />INVERTER TYPE:MICRO-INVERTER
<br />MAX INPUT VOLTAGE
<br />(V):60.00
<br />MAX INPUT CURRENT
<br />(A):15.00
<br />NOMINAL OUTPUT
<br />VOLTAGE (V):240Vac
<br />MAX CONT. OUTPUT
<br />CURENT (A):1.35
<br />INVERTER OCPD (A): 30
<br />MAX POWER AT 25ºC
<br />(W): 325
<br />SOLAR PV CIRCUIT BREAKER
<br />AIC RATING = 10kA
<br />MAIN SERVICE BUS RATING
<br />PER NEC 705.12(B)(2)(3)(b)
<br />BUSBAR: 225A x 120% = 270A
<br />TOTAL BUS LOAD: 200A + 32.1A ≤ 270A
<br />EQUIPMENT LEGEND
<br />ITEM DESCRIPTION
<br />A (N) CANADIAN SOLAR
<br />CS3W-450MB-AG MODULE
<br />B (N) NEMA 3R JUNCTION BOX
<br />C (N) NEMA 3R 60A AC DISCONNECT
<br />240VAC 10KAIC RATING,
<br />NON-FUSIBLE, BLADE TYPE VISIBLE
<br />& LOCKABLE
<br />D (N) NEMA 3R 60A AC DISCONNECT
<br />240VAC 10KAIC RATING,
<br />NON-FUSIBLE, BLADE TYPE VISIBLE
<br />& LOCKABLE
<br />INV #1: (N) ENPHASE IQ8M-60-72-US
<br />INVERTER
<br />EGC/GEC
<br />PER NEC 250.121,
<br />EXCEPTION 250.6(A)(II,III,IV),
<br />250.166, 690.47, 250.64(E)(E) GROUND
<br />ELECTRODE
<br />CONDUCTOR #4
<br />SEE NOTE 5
<br />PV SOLAR BREAKER TO BE MOUNTED
<br />ON THE OPPOSITE END OF THE BUSBAR
<br />FARTHEST FROM THE MAIN BREAKER
<br />OR INPUT FEEDER, AND NOT TO BE AT
<br />BOTH ENDS IF IT IS A CENTER-FED
<br />PANELBOARD. 705.12 (B)(2)(3)(b) or (d)
<br />MICROINVERTER TO JBOX
<br />ITEM
<br />NUMBER OF
<br />MODULES IN
<br />CIRCUIT
<br />ADJUSTED
<br />(#Micro*1.35A*1.25)
<br />TEMP ADJUST.
<br />(7/8"+ ABOVE)
<br />CORRECTED Ifc (A)
<br />FOR WIRE SIZING AWG NEEDED NUMBER OF
<br />CONDUCTORS EGC SIZE CONDUIT
<br />1.1 11 18.56 0.91 20.40 #12 THWN-2 L1, L2, G #6 Q CABLE
<br />1.2 8 13.50 0.91 14.84 #12 THWN-2 L1, L2, G #6 Q CABLE
<br />INVERTER TO LOAD CENTER/MSP CALCULATION
<br />ITEM INVERTER
<br />OUTPUT (A)CONTINUOUS RESULT (A)TEMPERATURE
<br />ADJUSTMENT ADJUSTED (A)AWG NEEDED NUMBER OF
<br />CONDUCTORS EGC/GEC CONDUIT
<br />3.1 25.65 1.25 32.06 0.91 35.23 #8 THWN-2 L1, L2, N, G #8 3/4" EMT
<br />J-BOX TO INVERTER CALCULATION
<br />ITEM
<br />OUTPUT @
<br />LARGEST
<br />CIRCUIT
<br />TEMP. ADJUSTMENT
<br />(7/8"+ ABOVE ROOF)ADJUSTED (A) Ifc
<br /># ENERGIZED
<br />CIRCUITS IN
<br />RACEWAY
<br />RACEWAY
<br />ADJUSTMENT
<br />FACTOR
<br />ADJUSTED (A) AWG NEEDED NUMBER OF
<br />CONDUCTORS EGC SIZE CONDUIT
<br />2.1 18.56 0.91 20.40 2 1.00 20.40 #10 THWN-2 1+, 1-, G #8 3/4" EMT
<br />2.2 13.50 0.91 14.84 2 1.00 14.84 #10 THWN-2 1+, 1-, G #8 3/4" EMT
<br />19 TOTAL MODULES
<br />19 TOTAL MICRO-INVERTERS (N) 40A/2P PV
<br />BREAKER
<br />04 OF 11
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<br />CIRCUIT 2 - 8 MODULES
<br />#6 BARE
<br />COPPER
<br />GROUND -
<br />EQUIPMENT
<br />CIRCUIT 1 - 11 MODULES
<br />A
<br />A
<br />1.1
<br />1.2
<br />G
<br />20A/2P
<br />PV SOLAR
<br />20A/2P
<br />PV SOLAR
<br />C
<br />15A
<br />ENVOY
<br />G
<br />B
<br />ON
<br />OFF
<br />D
<br />3.1
<br />M
<br />N
<br />(E) 200A
<br />MAIN BREAKER
<br />END-FED
<br />G
<br />LINELOAD
<br />(N) 40A/2P
<br />PV BRKR
<br />(E) 225A MAIN SERVICE
<br />METER/PANEL
<br />120/240VAC, 1PH, 3W,10KAIC
<br />TERMINALS SUITABLE FOR USE WITH
<br />60°C/75°C CU/Al WIRE
<br />3.12.1
<br />2.2
<br />1306 W Raymar St
<br />11/14/22
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