BLD2025-0264_Structural_Calculations_2.24.2025_10.59.47_AM_4776129ID
TYPICAL
INITIAL CONDUCTOR
FINAL CONDUCTOR
CONDUCTOR
CONDUIT
# OF
CURRENT -CARRYING
CONDUIT
OCPD
EGC
TEMP. CORR.
CONDUIT
CONT.
MAX.
BASE
DERATED
LENGTH
VOTAGE
LOCATION
LOCATION
PARALLEL
CONDUCTORSIN
FILL
FACTOR
FILL
CURRENT
CURRENT
AMP.
AMP.
DROP
CIRCUITS
CIRCUIT
PERCENT
FACTOR
1
1
ARRAY
JUNCTION BOX
12 AWG
Q CABLE
-
-
1
2
N/A
N/A
6 AWG
BARE
0.82
(48°C)
N/A
9.68A
12AA
N/A
N/A
30FT
0.30%
COPPER
2
1
JUNCTION BOX
IQ COMBINER BOX 4
10 AWG
THWN 2
COPPER
MIN 0.75" DIA
1
2
14.26 %
20A
8 AWG
THWN-2
1
(26°C)
1
9.68A
12AA
35A
35.00A
35FT
0.36%
EMT
COPPER
3
1
IQ COMBINER BOX 4
NON FUSED AC
10 AWG
THWN 2
COPPER
MIN 0.75" DIA
1
3
18.01%
N/A
8 AWG
THWN-2
1
(26"C)
1
9.68A
12.1A
35A
35.00A
5FT
0.05%
DISCONNECT
EMT
I
COPPER
4
1
NON FUSED AC
MSP
10 AWG
THWN 2
COPPER
MIN 0.75" DIA
1
3
1&01%
20A
8 AWG
THWN-2
1
(26°C)
1
9.68A
12AA
35A
35.00A
5FT
0.05%
DISCONNECT
EMT
I
COPPER
BRANCH 1
08- LONGI LR5-54HABB 395M (HI -MO 5) MODULES
JUNCTION BOX
Q CABLE 1 600 V, NEMA 3R,
ILL LISTED
0
FL
I
— — — — — — — — — — — —
--� --
(08) ENPHASE IQ8PLUS-72-2-US (240) MICROINVERTERS
PEAK OUTPUT POWER 300VA
TERMINATOR CAPS INSTALLED ON END OF CABLE
METER NO#: 1000600699
SCALE: NTS
PRODUCTION CT'S
GATEWAY
0
(N) AC DISCONNECT:
�240V, 30A NON -FUSED
3 / NEMA 3R, UL LISTED
N
L-------$�— — ---z— — c
2
(N) ENPHASE IQ
COMBINER BOX 4C
(X-I Q-AM 1-240-4 C)
WIRELESS COM KIT
CELL MODEM
INTERCONNECTION
120% RULE - NEC 705.12(B)(2)(3)(b)
UTILITY FEED + SOLAR BACKFEED
200A + 20A = 220A
BUSS RATING X 120%
225A x 120% = 270A
TO UTILITY GRID
O(N) BI-DIRECTIONAL UTILITY
o METER# 1000600699
1 -PH, 3-W, 120V/240V
(N) MAIN BREAKER TO
HOUSE 240 V, 20OAl2P
(N) MAIN SERVICE
PANEL, 225A RATED,
1-PH,3-W,240V
z �
N BACK FEED BREAKER AT
4 THE OPPOSITE END OF
THE MAIN BREAKER
L J
EXISTING GROUND
ELECTRODE CONDUCTOR
SYSTEM RATING
3.160 kWDC
2.400 kWAC
SERVICE INFO
UTILITY PROVIDER:
SNOHOMISH COUNTY
PUBLIC UTILITY
DISTRICT
AHJ NAME:
SNOHOMISH COUNTY
MAIN SERVICE VOLTAGE:
240V
MAIN SERVICE PANEL:
225 A
MAIN BREAKER RATING:
200 A
SERVICE FEED SOURCE:
OVERHEAD
SOLAR Al
ARIZONA, USA
PH# : (480) 524-1278
SYSTEM INFO
(8) LONGI
LR5-54HABB-395M
(8) ENPHASE
IQ8PLUS-72-2-US (240V)
DC SYSTEM SIZE' 3 160 kWDC
AC SYSTEM SIZE_ 2.400 kWAC
METER: 1000600699
REVISIONS
DESCRIPTION DATE REV
PROJECT NAME & ADDRESS
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DATE:2/10/2025
SHEET NAME
ELECTRICAL
LINE & CALCS.
SHEET SIZE
ANSI B
11" X 17"
SHEET NUMBER
PV-7
I
SOLAR MODULE SPECIFICATIONS
MANUFACTURER / MODEL
LONGI LR5-54HABB-395M
VMP
30.7 V
IMP
12.87 A
VOC
36.81 V
ISC
13.65 A
TEMP. COEFF. VOC
-0.27%/K
PTC RATING
369.3 W
MODULE DIMENSION
67.79"(L) x 44.64"(W)
PANEL WATTAGE
1395 W
INVERTER SPECIFICATIONS
MANUFACTURER / MODEL
ENPHASE IQ8PLUS-72-2-US (240V)
MAX DC SHORT CIRCUIT CURRENT
15 A
CONTINUOUS OUTPUT CURRENT
1.21 A
AMBIENT TEMPERATURE SPECS
RECORD LOW TEMP
-5°C
AMBIENT TEMP (HIGH TEMP 2%)
26°C
CONDUIT HEIGHT
7/8"
ROOF TOP TEMP
48°C
CONDUCTOR TEMPERATURE RATE
90°C
MODULE TEMPERATURE COEFFICIENT OF VOC
-0.27%/K
PERCENT OF VALUES
NUMBER OF CURRENT CARRYING
CONDUCTORS IN EMT
0.80
4-6
0.70
7-9
0.50
10-20
VOLTAGE RISE IN Q CABLE FROM THE MICROINVERTERS TO THE JUNCTION BOX
FOR BRANCH CIRCUIT #1 OF 8 IQ8PLUS MICROS, THE VOLTAGE RISE ON THE 240 VAC Q CABLE IS 0.30%
VOLTAGE RISE FROM THE JUNCTION BOX TO THE IQ COMBINER BOX 4
VRISE = (AMPS/INVERTER X NUMBER OF INVERTERS) X (RESISTANCE IN OHMS/FT.) X (2-WAY WIRE LENGTH IN FT.)
= (1.21 AMP X 8) X (0.00129 OHMS/FT) X (35 FT X 2)
= 9.68 AMPS X 0.00129 OHMS/FT) X 70 FT
= 0.87 VOLTS
%VRISE = 0.87 VOLTS - 240 VOLTS = 0.36%
THE VOLTAGE RISE FROM THE JUNCTION BOX TO THE IQ COMBINER BOX 4 IS 0.36%
VOLTAGE RISE FROM THE IQ COMBINER BOX 4 TO THE NON FUSED AC DISCONNECT
VRISE = (AMPS/INVERTER X NUMBER OF INVERTERS) X (RESISTANCE IN OHMS/FT.) X (2-WAY WIRE LENGTH IN FT.)
= (1.21 AMP X 8) X (0.00129 OHMS/FT) X (5 FT X 2)
= 9.68 AMPS X 0.00129 OHMS/FT) X 10 FT
= 0.12 VOLTS
%VRISE = 0.12 VOLTS = 240 VOLTS = 0.05%
THE VOLTAGE RISE FROM THE IQ COMBINER BOX 4 TO THE NON FUSED AC DISCONNECT IS 0.05%
VOLTAGE RISE FROM THE NON FUSED AC DISCONNECT TO THE MSP
VRISE = (AMPS/INVERTER X NUMBER OF INVERTERS) X (RESISTANCE IN OHMS/FT.) X (2-WAY WIRE LENGTH IN FT.)
= (1.21 AMP X 8) X (0.00129 OHMS/FT) X (5 FT X 2)
= 9.68 AMPS X 0.00129 OHMS/FT) X 10 FT
= 0.12 VOLTS
%VRISE = 0.12 VOLTS - 240 VOLTS = 0.05%
THE VOLTAGE RISE FROM THE NON FUSED AC DISCONNECT TO THE MSP IS 0.05%
TOTAL SYSTEM VOLTAGE RISE FOR ALL WIRE SECTIONS
0.3% + 0.36% + 0.05% + 0.05% = 0.76%
SOLAR Al
ARIZONA, USA
PH# : (480) 524-1278
SYSTEM INFO
(8) LONGI
LR5-54HABB-395M
(8) ENPHASE
IQ8PLUS-72-2-US (240V)
DC SYSTEM SIZE 3 160 kWDC
AC SYSTEM SIZE_ 2.400 kWAC
METER: 1000600699
I REVISIONS
DESCRIPTION I DATE I REV
PROJECT NAME & ADDRESS
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DATE: 2/10/2025
SHEET NAME
SPECIFICATIONS
& NOTES
SHEET SIZE
ANSI B
11" X 17"
SHEET NUMBER
PV-8