HomeMy WebLinkAboutRICHARD SANDERSPROJECT DESCRIPTION: APPLICABLE CODES:
2016 CALIFORNIA BUILDING CODE, [CBC]
(28) SUNPOWER SPR -X22 -360 -D -AC MICROINVERTER MODULES '` •' 2016 CALIFORNIA RESIDENTIAL CODE, [CRC] �r _
ROOF MOUNTED SOLAR PHOTOVOLTAIC MODULES 2016 CALIFORNIA PLUMBING CODE, [CPC]
SYSTEM SIZE: 10.08 kW DC STC 2016 CALIFORNIA MECHANICAL CODE, [CMC] [' 1
2016 CALIFORNIA ELECTRICAL CODE, [CEC]
EQUIPMENT SUMMARY 2016 CALIFORNIA'FIRE CODE, [CFC]
•28 SUNPOWER SPR -X22 -360 -D -AC MICROINVERTER MODULES 2016 CALIFORNIA GEEN BUILDING STANDARDS CODE, [CGBSC]
SHEET INDEX ` - 2016 CALIFORNIA ENERGY CODE, [CEC] { ,
PV -1 :. - SITE PLAN, HOUSE PHOTO & VICINITY MAP _ , 2016 ADA STANDARDS FOR ACCESSIBLE DESIGN `
PV -2 ROOF PLAN & MODULESARTICLE 690, NEC 2014 CODE BOOK -K{ t
PV -3 ATTACHMENT DETAIL z TITLE 24 RESIDENCE ENERGY EFFICIENCY STANDARDS'' t
PV -4 ELECTRIC LINE DIAGRAM .F CAL=FIRE PHOTOVOLTAIC INSTALLATION GUIDELINES
PV -5 WIRING CALCULATIONS "
PV -6 PLACARDS, CALCS., SPECS., FIRE —
PV -7 to 12 EQUIPMENT SPECIFICATION
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SANRIC• 1403-Y
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MODULE TYPE, DIMENSIONS & WEIGHT
NUMBER OF MODULES = 28 MODULES
MODULE TYPE = SUNPOWER SPR -X22 -360 -D -AC MICROINVERTER MODULES
MODULE WEIGHT = 45.5 LBS / 20.6 KG.
MODULE DIMENSIONS = 61.3" x 41.2" = 17.54 SF
UNIT WEIGHT OF ARRAY = 2.59 PSF
ARRAY & ROOF AREA (E) FENCE
CALC'S (ROOF #1 - #2
ROOF #1 ARRAY AREA: 52.61 SQ. FT.
ROOF #2 ARRAY AREA: 438.46 SQ. FT.
TOTAL ARRAY AREA = 491.07 SQ. FT.
ROOF AREA = 1,118 SQ. FT.
491.07 / 1,118 = 43.92% OF ROOF
FACE AREA COVERED BY ARRAY
ROOF DESCRIPTION (ROOF #1 - #2)
ROOF TYPE - COMPOSITON SHINGLE ROOF
ROOF TILT - 19°
ROOF AZIMUTH - 98° 278°
RAFTER SIZE - 2" X 4" @ 24" O.C. ^ ,
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2016 CRC SECTION R324.7.2(1-7)
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JOB ID:
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11,112017
JOB ID:
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PROJECT NAME
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SANRIC-1403Y
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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):
22'
EXPECTED WIRE TEMP (°C): 38'+ 22°
60
TEMP CORRECTION PER CEC TABLE 310.15(B)(2)(a):
0.71
# OF CURRENT CARRYING CONDUCTORS:
4
CONDUIT FILL CORRECTION PER CEC TABLE 310.15(B)(3)(a):
0.80
CIRCUIT CONDUCTOR SIZE:
10AWG
CIRCUIT CONDUCTOR AMPACITY PER CEC TABLE 310.15(6)(16):
40A
REQUIRED CIRCUIT CONDUCTOR AMPACITY PER NEC 690.8(A&B):
29.92A
1.25 X MAX AC OUTPUT CURRENT X # OF INVERTERS PER STRING
15A
1.25X1.33X9
DERATED AMPACITY OF CIRCUIT CONDUCTOR PER NEC TABLE 310.15
TEMP CORR. PER CEC TABLE 310.15(B)(2)(a) X
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CONDUIT FILL CORR. PER CEC TABLE 310.15(B)(3)(a) X
22.72A
CIRCUIT CONDUCTOR AMPACITY PER CEC TABLE 310.15(B)(16) _
0.71 X0.80X40
AC CONDUCTOR AMPACITY CALCULATIONS:
FROM LOAD CENTER TO MSP
EXPECTED WIRE TEMP (°C):
38°
TEMP CORRECTION PER CEC TABLE 310.15(B)(2)(c):
0.91
CIRCUIT CONDUCTOR SIZE:
8AWG
CIRCUIT CONDUCTOR AMPACITY: R
55A
# OF CURRENT CARRYING CONDUCTORS:
3
CONDUIT FILL PER CEC TABLE 310.15(B)(3)(a):
1
REQUIRED CIRCUIT CONDUCTOR AMPACITY PER NEC 690.8(B):
1.25 X OUTPUT CURRENT OF LOAD CENTER
29.92A
1.25X1.33X18
DERATED AMPACITY OF CIRCUIT CONDUCTORS PER NEC TABLE 310.15:
TEMP CORR. PER CEC TABLE 310.15(B)(2)(c) X
CONDUIT FILL CORR. PER CEC TABLE 310.15(B)(3)(a) X
50.05A
CIRCUIT CONDUCTOR AMPACITY =
.91 X 1 X 55
.PERCENT OF
VALUES
NUMBER OF CURRENT
CARRYING CONDUCTORS IN
EMT
0.80
4-6
0.70
7-9
0.50
10-20
ELECTRICAL NOTES '
1. NO DC CONDUCTORS PRESENT.
2.., ALL EQUIPMENT TO BE LISTED BY UL OR OTHER NRTL, AND
LABELED FOR ITS APPLICATION.
3. ALL CONDUCTORS SHALL BE COPPER, RATED FOR 600 V AND 90
DEGREE C WET ENVIRONMENT. .
4. WIRING, CONDUIT, AND RACEWAYS MOUNTED ON ROOFTOPS
SHALL BE ROUTED DIRECTLY TO, AND LOCATED AS CLOSE AS
POSSIBLE TO THE NEAREST RIDGE, HIP, OR VALLEY.
5. WORKING CLEARANCES AROUND ALL NEW AND EXISTING
ELECTRICAL EQUIPMENT SHALL COMPLY WITH NEC 110.26.
6. DRAWINGS INDICATE THE GENERAL ARRANGEMENT OF SYSTEMS.
CONTRACTOR SHALL FURNISH ALL NECESSARY OUTLETS,
SUPPORTS, FITTINGS AND ACESSORIES TO FULFILL APPLICABLE
CODES AND STANDARDS.
7. WHERE S1ZES OF JUNCTION BOXES, RACEWAYS, AND CONDUITS
ARE NOT SPECIFIED, THE CONTRACTOR'SHALL SIZE THEM
ACCORDINGLY.
8. ALL WIRE TERMINATIONS SHALL BE APPROPRIATELY LABELED
AND READILY VISIBLE.
9. THE INVISIMOUNT SYSTEM IS LISTED TO UL2703 FOR INTEGRATED
GROUNDING: SUNPOWER AC MODULES ARE BONDING
COMPOPNET AND ARE LISTED TO UL1741. IF YOU ARE INSTALLING
SUNPOWER AC MODULES ON THE INVISIMOUNT SYSTEM (OR ANY
MOUNTING SYSTEM THAT IS LISTED TO UL2703 FOR BONDING -NOT
JUST FOR FIRE CLASIFICATION), NO ADDITIONAL GROUNDING
HARDWARE, LUGS, OR COPPER WIRE ARE REQUIRED ON THE
ROOF MODULE SUPPORT RAIL TO BE BONDED TO CONTINUOUS
COPPER G.E.C. VIA WEEB LUG OR ILSCO GBL-4DBT LAY -IN LUG.
10. EACH SUNPOWER AC MODULE INCLUDES A
FACTORY-INTERGRATED MICROINVERTER (M) THAT DOES NOT
REQUIRE A NUETRAL WIRE TO BE CONNECTED TO IT FOR -
OPERATION OR FOR COMPLIANCE WITH IEEE 1547. POWER
PRODUCED IS CONDUCTED ON THE L1-L2 240VAC OR 208 VAC
GRID CONNECTION. UTILITY INTERACTIVE FUNCTIONS IN THE MI
CIRCUITRY HAVE BEEN EVALUATED TO IEEE 1547, AND USE THE
GROUND WIRE INSTEAD OF THE NEUTRAL TO DETERMINE GRID
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DESCRIPTION DATE REV
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REVIEWED BY
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11/1/2017
JOB ID:
SANRIC-1403-Y
PROJECT NAME
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SHEET NUMBER
PV -5
WARNING
INVERTER OUTPUT CONNECTION DO NOT
N L.
RELOCATE THIS OVERCURRENT DEVICE
LABEL LOCATION: +, s
POINT OF INTERCONNECTION _ si s - r•
(PER CODE: CEC 705.12(D)(7))
LAtitL LUGA I lulu:_ [Not required if panel is rated not less than sum of ampere ratings
DC DISCONNECT, INVERTER
of all overcurrent devices supplying it)
(PER CODE: CEC 690.35(F)) s
• [To be used when inverter is ungrounded]
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LABEL LOCATION:
DC DISCONNECT, INVERTER.
(PER CODE: CEC 690.35(F)) ti, *` _ LABEL LOCATION: . t, •1• a I : •.
[To be used when inverter is ungrounded] " DISCONNECT, POINT OF INTERCONNECTION + ;
PER CODE' OEC690 13(8))
AWARNING
ELECTRIC SHOCK HAZARD :
DO NOT TOUCH TERMINALS
TERMINALS ON BOTH LINE AND
LOAD SIDES MAY BE ENERGIZED
IN THE OPEN POSITION'
DC VOLTAGE IS ALWAYS PRESENT
WHEN SOLAR MODULES ARE
EXPOSED TO SUNLIGHT
A WARNING DUAL POWER SOURCE
SECOND SOURCE IS PHOTOVOLTAIC SYSTEM +' I
`. LABEL LOCATION:
POINT OF INTERCONNECTION r' P
" (PER CODE: CEC 705.12(D)(4))
CAUTION: SOLAR ELECTRIC
SYSTEM CONNECTED"
LABEL LOCATION: 3 t'
WEATHER RESISTANT MATERIAL, DURABLE ADHESIVE,
LABEL LOCATION: UL969 AS STANDARD TO WEATHER RATING (UL LISTING `• �' '
AC DISCONNECT, POINT OF INTERCONNECTION OF MARKINGS NOT REQUIRED), MIN %8' LETTER HEIGHT
(PER CODE: CEC 690.17(E)) ' ARIAL OR SIMILAR FONT NON -BOLD, PLACED WITHIN
:THE MAIN SERVICE DISCONNECT, PLACED ON THE
t OUTSIDE OF THE COVER WHEN DISCONNECT.IS » •` } , - Y
OPERABLE WITH SERVICE PANEL CLOSED. o
i- (PER CODE: CEC690.15, 690.13(B)) a '
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DESCRIPTION DATE REV
Signature with Seal
REVIEWED BY
• RAFAEL VALDEZ
• 11/1/2017
JOB ID:
SANRIC-1403-Y
PROJECT NAME '.
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SHEET SIZE
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SHEET NUMBER
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LOAD SIDES MAYBE ENERGIZED
'•
• • •
-IN THE OPEN POSITION'
EQUIPPED
LABEL LOCATION:
AC DISCONNECT, POINT OF INTERCONNECTION
RAPID SHUTDOW!`
PER CODE: CEC 690.17(E), CB
NEC ARTICLE 690.56(C) PART NO.596-0047
WARNING -Electric Shock Hazard
No user serviceable inside
REFLECTIVE MATERIAL REQUIRED. s
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LABEL LOCATION:
INVERTER, JUNCTION BOXES (ROOF), AC DISCONNECT
;
(PER CODE: CEC690.13.G.3 & CEC 690.13.G.4)
• 'NING: PHOTOVO
LABEL LOCATION:
CONDUIT, COMBINER BOX
(PER CODE: CEC690.31(G)(3)(4) & CEC 690.13(G)(4)
-
ADHESIVE FASTENED SIGNS:
• THE LABEL SHALL BE SUITABLE FOR THE ENVIRONMENT
WHERE IT IS INSTALLED.
'
• WHERE REQUIRED ELSEWHERE IN THIS CODE, ALL FIELD
!
_ APPLIED LABELS, WARNINGS, AND MARKINGS SHOULD '
COMPLY WITH ANSI Z535.4 [NEC 110.21(6) FIELD MARKING].
"
• ADHESIVE FASTENED SIGNS MAY BE ACCEPTABLE IF
,
PROPERLY 'ADHERED. VINYL SIGNS SHALL BE WEATHER
RESISTANT [IFC 605.11.1.31
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DESCRIPTION DATE REV
Signature with Seal
REVIEWED BY
• RAFAEL VALDEZ
• 11/1/2017
JOB ID:
SANRIC-1403-Y
PROJECT NAME '.
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' UL IiAedto UO 74t SA
rSRDs. IEEE 15477:2003;IEEE 1547x-20T4:*CA
'Rule 21 Phase 1
PV Rapid Shutdown Equipment:
Equipment Grounding
OC -6703" C97'6_ 1Conneetors andtables
i(load break ikonnection)'
UL' 1741:AC;Module (Type 2fire rating)
CertirtcatrorisEnables Installation In accordance with
_. NEC 690.6
'NEC 690.12' Rapid Shutdown'(1nside arid'
i outside the -array)
NEC69015'ACConner_tors 69033(A)='(E)E;1)
FCC and ICES 003 Class B`
When used with InyisiMourit racking (UL 2703r's
'Integrated grounding Arlt bonding
'" Class A fire rated
Plb Test 1Poieritiai-Induced deo.adatibn free:
260 mm
21 A21n1 1.
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REVISIONS
DESCRIPTION I DATE REV
Signature with Seal
REVIEWED BY
• RAFAEL VALDEZ
11/1/2017
JOB ID: 1
SANRIC-1403-Y
PROJECT NAME
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SHEET NUMBER
PV -7
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Mmt.AmWwttTmv.
122° FCW Q
Max Load
Wind: 62 pst 30M Pa, 3415 bVW front & bad+
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.. .r
25 year I mited' uct.wa�rarity
' UL IiAedto UO 74t SA
rSRDs. IEEE 15477:2003;IEEE 1547x-20T4:*CA
'Rule 21 Phase 1
PV Rapid Shutdown Equipment:
Equipment Grounding
OC -6703" C97'6_ 1Conneetors andtables
i(load break ikonnection)'
UL' 1741:AC;Module (Type 2fire rating)
CertirtcatrorisEnables Installation In accordance with
_. NEC 690.6
'NEC 690.12' Rapid Shutdown'(1nside arid'
i outside the -array)
NEC69015'ACConner_tors 69033(A)='(E)E;1)
FCC and ICES 003 Class B`
When used with InyisiMourit racking (UL 2703r's
'Integrated grounding Arlt bonding
'" Class A fire rated
Plb Test 1Poieritiai-Induced deo.adatibn free:
260 mm
21 A21n1 1.
'1107. mm7....J�
943.61n];:1046mrn
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REVISIONS
DESCRIPTION I DATE REV
Signature with Seal
REVIEWED BY
• RAFAEL VALDEZ
11/1/2017
JOB ID: 1
SANRIC-1403-Y
PROJECT NAME
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' UL IiAedto UO 74t SA
rSRDs. IEEE 15477:2003;IEEE 1547x-20T4:*CA
'Rule 21 Phase 1
PV Rapid Shutdown Equipment:
Equipment Grounding
OC -6703" C97'6_ 1Conneetors andtables
i(load break ikonnection)'
UL' 1741:AC;Module (Type 2fire rating)
CertirtcatrorisEnables Installation In accordance with
_. NEC 690.6
'NEC 690.12' Rapid Shutdown'(1nside arid'
i outside the -array)
NEC69015'ACConner_tors 69033(A)='(E)E;1)
FCC and ICES 003 Class B`
When used with InyisiMourit racking (UL 2703r's
'Integrated grounding Arlt bonding
'" Class A fire rated
Plb Test 1Poieritiai-Induced deo.adatibn free:
260 mm
21 A21n1 1.
'1107. mm7....J�
943.61n];:1046mrn
I...—_.. -: lssamm:---- - CC
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II � [orap
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REVISIONS
DESCRIPTION I DATE REV
Signature with Seal
REVIEWED BY
• RAFAEL VALDEZ
11/1/2017
JOB ID: 1
SANRIC-1403-Y
PROJECT NAME
9 � � � C V
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PV -7
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Invisirnount Span Tables • , personnel and equipment cannot be placed on top of the array. It Is recommended to stagger .-
Engineering Summary Letter •' _ : .attachment points, as shown In Figure 1, to evenly distribute loads to the rafters. t
The following tables list the allowable spacing of attachment points for the SUnPOWer Invisimount air
mounting system. Loads on the system were calculated in accordance with CBC 2016 and ASCE 7-10, t
using the following parameters:
s Risk Category 11 0 -
a System weight (including PV modules, rails, attachments, and wiring) =.2,84 psf
s No live load acts on top of the PV modules.. '« t , t
- e Wind speed & exposure as Indicated In the tables �.��
a Roof height and slope as indicated in the tables
-ti sR'it ., •. r. ;7i� �'i�, tiiir.- �.t�yC•' E• i �,. .. =:
s For wind load, topographic factor Kzt =1.0, and directionality factor Kd = 0.8S per ASCE 7-10 Table
26.6-1 , µ r yip I . v. t ' . ,>I• . w';
• Wind load coefficients per either wind tunnel testing or ASCE 7.10 Chapter 30 (see' -notes below
' • tables) - ' - • • � ra�'N-��icEva3 sFaaiLc�uQ ` I � ' ' , �; ti �, _ ;�^ +� •
s>rsn�an�•sr 1 " '
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® _Ground snow load as indicated in the tables r r s�irrrepT
- �.
r e For snow loads, thermal factor Ct =1.2 ("unheated and open air structures"), per ASCE 7-10 Table
` 7-3 Frgurel,l
.' e, -For snow loads, exposure factor Ce 0.9 ("fully exposed"), per ASCE 7-10 Table 7-2 - *—These tables assume that each module is installed centered over a pair of rails, as shown in Figure
'a 'Far snow loads, slope factor Cs is determined per ASCE 7-10 Figure 7-2 assuming the array is an E a
2(a), In cases where one rail is closer to the midpoint of the module, as shown in Figure 2(b);
"unobstructed slippery surface" where snow is free to slide off the array t-,,
f ,adjustments to the spacing may be required. ;
• Seismic short-term spectral acceleration (Ss) = 3.Og maximum, and seismic site class = D, per ASCE ; s
7-10 Section 11.4.2
e :.Seismic component importance factor Ip =1.0 per ASCI: 7-10 Section 13.1.3; seismic component
response factor Rp =1.5 and, cam anent amplification factor a —1.0per ASCE 7-10 Table 13.5-1
and 13..6-1; seismic loads are calculated per ASCE 7-10 Chapters 11 and 13P RM
-
a Load combinations per ASCE 7-10 Chapter 2- _ l
` The maximum allowable spans shown in the tables are based on the calculated loads and the capacity of - r� WISOMMId
the rail and the attachment,•determined by analysis and testing in accordance with IBC 2012/2015 and
referenced standards. Figure 2-
• Bending strength of aluminum rails is calculated according to the Aluminum Design Manual 2010 '
Section B.3.2.1(LiiFD) Please contact Sun Power for any further technical information which maybe required. ,
• The strength of attachments to the Lfoot roof attachment hardware is based on product ; �• ,
Information from the attachment manufacturer
• The strength of the lag screw In withdrawal and shear is calculated according to the National
Design Specification (NDS) for Wood Construction, 2010"�ppFESS/p�u l .• ,
n The maximum allowable attachment spacing is calculated by checking the demand/capacity ratios., • • r`= n��cR U Jp�ryll - s
for.bending in the tall and tension, compression and shear on attachments for all required load
Y; combinations. The reported maximum allowable spacing is the greatest sparing, rounded down ' -NO. a�s�2
r to the nearest 2 -foot increment, for which the demand/capacity ratios are less than or equal to
1.0. • - c/vis _ �` ;-
. .. ` 4 • These tables do not consider the strength of the supporting roof structure. In areas of low snow • � 4 SOF 7/I-7 '
load, the weight of the array is often_ considered to offset the design live load of the roof, since
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JOB ID:
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PROJECT NAME
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DESCRIPTION DATE" REV
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11/1/2017 '
JOB ID:
SANRIC-1403-Y
PROJECT NAME
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•_ The AC Module cable system is daisy -chained" and therefore if a moduli is removed from a circuit (for
service or replacement, for example), you must first disconnect all power and then install a temporary
- EGC to bridge the gap by inserting an AC extension cable or other means, in order to maintain effective
_ ground continuity to subsequent modules. Disconnecting a module from the circuit removes voltage and
ground from the other,downstream modules in the circuit, Extreme care should be taken to ensure that,
no other energized sources are adjacent to these ungrounded modules.-
Because
odules:Because the DC power is internal to the module, -a grounding electrode conductor (GEC) for the module or array
K is not required. The existing AC GEC at the utility service serves as the NEC -required GEC for the structure:
• The AC cable grounding path has been tested by an NRTL, and its. electrical continuity from the AC cable ground
- pinto the module frame has been certified. _t'
• The AC Module interconnecting cable system provides an internal EGC for grounding the AC Modules: It Is the '
installer's responsibility to ground any metallic mounting structure according to local code—recall that if you are
' • * , .' - , install'ing AC Modules, the system provides grounding of the InvisiMount mounting structure and thus no
"•. supplemental grounding is required. `
4:0 Grounding4 , it
_ b Neither the AC Modules nor the array require a grounding electrode conductor (GEC). The AC Modules must be .
connected to a dedicated AC branch circuit with an appropriately sized equipment grounding conductor,(EGC).,, ,
Ensure that you fully understand the grounding aspects in this section before proceeding. The equipment grounding conductor must be connected to a grounding electrode using the existing premises
wiring system, typically originating at the building service entrance or service panel.
lmportanV If installing InvisiMount on a metal roof, you must first ensure that the InvisiMount system is bonded to r -
• There is no neutral conductor in the AC Modules. Each AC Module has been designed and is Listed to operate
the roof in compliance with grounding methods as required by the AHJ.
witl6t a neutral conductor. The -reference to ground in the AC Modules is through the equipment grounding
- • This section is intended to provide a well-rounded understanding of all aspects of grounding for SunPower Ac' _ conductor (EGC).
. Modules,when they are installed on the SunPowerm InvisiMount"A Residential Mounting System; it contains excerpts, Y _ y
The AC interconnecting cable system attached to each module's microinverter is fully insulated and includes an
from the SunPower 96 -Cell AC Module Design and Installation Guide (#515791); and the SunPower AC Module
internal EGC The grounding pin is longer than the others in the plug, providing a "first to make, last to break"
Safety and Installation Instructions (#51744); as well as references to the applicable NEC Artides and UL Standards: connection sequence. I •
i. _ -
• The green conductor in the transition cable ("trans cable") is connected to the EGC from the utility dedicated
The InvisiMount system is Listed to UL 2703 for integrated grounding; SunPower AC Modules are a bonding branch circuit ("house ground").
component and are Listed to UL 1741. if you are installing SunPowerAC Modules on the invisiMount system (or • TheAC ground wire inside the microinverter terminates on the microinverter chassis with a bolted connection,.
` any mounting system that is Lasted to UL 2703 for.bonding—notjust forfire classification), no additional and is environmentally sealed. -
grounding hardware, lugs, or copper wire are required on the roof. `
• The microinverter chassis is bonded to the module frame with stainless steel hardware to provide ground
. continuity to the module frame.
AP The SunPower AC Module is one of the components that bonds all of the metallic non-current carrying Each receptacle has a ground pin that is longer than the circuit pins to ensure that the ground is the first to make
components in the system, and is Listed to UL 1741. contact when connecting a given plug -receptacle pair, and the last to break contact when disconriectingthe pair,
• As part of UL 2703, only AC equipment grounding -requirements apply—no DC system grounding requirements
nor DC equipment grounding requirements apply.
• .The equipment grounding conductor (EGC) that's built Into the AC Module cable system is sized appropriately
and meets all of the AC equipment grounding requirements for the system.
The AC dedicated branch circuit wiring from the readily accessible disconnect to the array must include an
Each SunPower AC Module includes a factory -integrated microinverter (MI) that does not require a neutral
wire to be connected to it for operation or for compliance with IEEE 7547. Power produced is conducted on the
L1-L2 240 VAC or 208 VAC grid connection. Utility interactive functions inthe MI circuitry have been evaluated to
IEEE 1547, and use the ground wire instead of the neutral to determine grid values. This functionality is part of its
UL Listing.
equipment grounding conductor (EGC) in the same raceway or cable as the AC circuit conductors, This EGC must ,
be connected to the green conductor of the transition cable, which is part of the AC module cable system.
Document$508988 RevF r 13 c' . SunPower Proprietary
- t
Dowment #508988 RevF
•, r
Rail splice screws
4,5 N -m (401n -lbs)
(This torque value is achieved by 1/3 turn of the sdeW after the screw face_
r
'
has contacted the rail face. After tightening in this manner, verify the
.•
applied torque with a torque wrench.)
L -foot to roof
Refer to the `roof attachment manufacturer's documentation (included in
attachment
the roof attachment box). If using a roof attachment other than L -feet, refer,
to that attachment manufacturer's included documentation..
•_ The AC Module cable system is daisy -chained" and therefore if a moduli is removed from a circuit (for
service or replacement, for example), you must first disconnect all power and then install a temporary
- EGC to bridge the gap by inserting an AC extension cable or other means, in order to maintain effective
_ ground continuity to subsequent modules. Disconnecting a module from the circuit removes voltage and
ground from the other,downstream modules in the circuit, Extreme care should be taken to ensure that,
no other energized sources are adjacent to these ungrounded modules.-
Because
odules:Because the DC power is internal to the module, -a grounding electrode conductor (GEC) for the module or array
K is not required. The existing AC GEC at the utility service serves as the NEC -required GEC for the structure:
• The AC cable grounding path has been tested by an NRTL, and its. electrical continuity from the AC cable ground
- pinto the module frame has been certified. _t'
• The AC Module interconnecting cable system provides an internal EGC for grounding the AC Modules: It Is the '
installer's responsibility to ground any metallic mounting structure according to local code—recall that if you are
' • * , .' - , install'ing AC Modules, the system provides grounding of the InvisiMount mounting structure and thus no
"•. supplemental grounding is required. `
4:0 Grounding4 , it
_ b Neither the AC Modules nor the array require a grounding electrode conductor (GEC). The AC Modules must be .
connected to a dedicated AC branch circuit with an appropriately sized equipment grounding conductor,(EGC).,, ,
Ensure that you fully understand the grounding aspects in this section before proceeding. The equipment grounding conductor must be connected to a grounding electrode using the existing premises
wiring system, typically originating at the building service entrance or service panel.
lmportanV If installing InvisiMount on a metal roof, you must first ensure that the InvisiMount system is bonded to r -
• There is no neutral conductor in the AC Modules. Each AC Module has been designed and is Listed to operate
the roof in compliance with grounding methods as required by the AHJ.
witl6t a neutral conductor. The -reference to ground in the AC Modules is through the equipment grounding
- • This section is intended to provide a well-rounded understanding of all aspects of grounding for SunPower Ac' _ conductor (EGC).
. Modules,when they are installed on the SunPowerm InvisiMount"A Residential Mounting System; it contains excerpts, Y _ y
The AC interconnecting cable system attached to each module's microinverter is fully insulated and includes an
from the SunPower 96 -Cell AC Module Design and Installation Guide (#515791); and the SunPower AC Module
internal EGC The grounding pin is longer than the others in the plug, providing a "first to make, last to break"
Safety and Installation Instructions (#51744); as well as references to the applicable NEC Artides and UL Standards: connection sequence. I •
i. _ -
• The green conductor in the transition cable ("trans cable") is connected to the EGC from the utility dedicated
The InvisiMount system is Listed to UL 2703 for integrated grounding; SunPower AC Modules are a bonding branch circuit ("house ground").
component and are Listed to UL 1741. if you are installing SunPowerAC Modules on the invisiMount system (or • TheAC ground wire inside the microinverter terminates on the microinverter chassis with a bolted connection,.
` any mounting system that is Lasted to UL 2703 for.bonding—notjust forfire classification), no additional and is environmentally sealed. -
grounding hardware, lugs, or copper wire are required on the roof. `
• The microinverter chassis is bonded to the module frame with stainless steel hardware to provide ground
. continuity to the module frame.
AP The SunPower AC Module is one of the components that bonds all of the metallic non-current carrying Each receptacle has a ground pin that is longer than the circuit pins to ensure that the ground is the first to make
components in the system, and is Listed to UL 1741. contact when connecting a given plug -receptacle pair, and the last to break contact when disconriectingthe pair,
• As part of UL 2703, only AC equipment grounding -requirements apply—no DC system grounding requirements
nor DC equipment grounding requirements apply.
• .The equipment grounding conductor (EGC) that's built Into the AC Module cable system is sized appropriately
and meets all of the AC equipment grounding requirements for the system.
The AC dedicated branch circuit wiring from the readily accessible disconnect to the array must include an
Each SunPower AC Module includes a factory -integrated microinverter (MI) that does not require a neutral
wire to be connected to it for operation or for compliance with IEEE 7547. Power produced is conducted on the
L1-L2 240 VAC or 208 VAC grid connection. Utility interactive functions inthe MI circuitry have been evaluated to
IEEE 1547, and use the ground wire instead of the neutral to determine grid values. This functionality is part of its
UL Listing.
equipment grounding conductor (EGC) in the same raceway or cable as the AC circuit conductors, This EGC must ,
be connected to the green conductor of the transition cable, which is part of the AC module cable system.
Document$508988 RevF r 13 c' . SunPower Proprietary
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