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AC inverter output rating of 10 kW, with (City of Azusa)

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BROWSE CITY OF AZUSA (CA) FORMS

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Page 1 of 6
AC inverter output rating of 10 kW, with a maximum of 3 branch circuits, one PV module per inverter and with PV module ISC maximum
of 10-A DC, installed on a roof of a one- or two-family dwelling or accessory structure. The photovoltaic system must interconnect to a
single-phase AC service panel of 120/240 Vac with service panel bus bar rating of 225 A or less. This plan is not intended for bipolar
systems, hybrid systems or systems that utilize storage batteries, charge controllers or trackers. Systems must be in compliance with
current California Building Standards Codes and local amendments of the authority having jurisdiction (AHJ). Other articles of the
California Electrical Code (CEC) shall apply as specified in section 690.3.
MANUFACTURER’S SPECIFICATION SHEETS MUST BE PROVIDED for proposed inverters, modules, combiner/junction boxes and racking
systems. Installation instructions for bonding and grounding equipment shall be provided and local AHJs may require additional details.
Listed and labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling (CEC
110.3). Equipment intended for use with PV system shall be identified and listed for the application CEC 690.4(D).
Applicant and Site Information
Job Address: ______________________________________________ Permit #: __________________________
Contractor /Engineer Name: _________________________________ License # and Class: _________________
Signature: _______________________________ Date: ___________ Phone Number: ____________________
1. General Requirements and System Information
Microinverter AC Module (ACM)
Number of PV modules installed: __________ Number of ACMs installed: __________
Number of Microinverters installed: __________ Note: Listed Alternating-Current Module (ACM) is defined
in CEC 690.2 and installed per CEC 690.6
1.1 Number of Branch Circuits, 1, 2 or 3: __________
1.2 Actual number of Microinverters or ACMs per branch circuit: 1 _________ 2._________ 3.________
1.3 Total AC system power rating = (Total Number of Microinverters or ACMs) * (AC inverter power output)
= __________ Watts
1.4 Lowest expected ambient temperature for this plan in Table 1: For -1 to -5°C use 1.12 or for -6 to -10°C
use 1.14 correction factors.
1.5 Average ambient high temperature for this plan: = +47°C
Note: For lower expected ambient or higher average ambient high temperatures, use Comprehensive Standard Plan.
2. Microinverter or ACM Information and Ratings
Microinverters with ungrounded DC inputs shall be installed in accordance with CEC 690.35.
Microinverter or ACM Manufacturer: _____________________________
Model: ______________________________________________________
Solar PV Standard Plan – Simplified
Microinverter and ACM Systems for
One- and Two-Family Dwellings
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Page 2 of 6
2.1 Rated (continuous) AC output power: __________ Watts
2.2 Nominal AC voltage rating: __________ Volts
2.3 Rated (continuous) AC output current: __________ Amps
If installing ACMs, skip [STEPS 2.4]
2.4 Maximum DC input voltage rating: __________ Volts (limited to 79 V, otherwise use the Comprehensive
Standard Plan)
2.5 Maximum AC output overcurrent protection device (OCPD) ___________ Amps
2.6 Maximum number of Microinverters or ACMs per branch circuit: ___________
3. PV Module Information
(If installing ACMs, skip to [STEP 4])
PV Module Manufacturer: _______________________________________________
Model: _______________________________________________________________
Module DC output power under standard test conditions (STC) = __________ Watts
3.1 Module VOC at STC (from module nameplate): __________ Volts
3.2 Module ISC at STC (from module nameplate): ___________ Amps
3.3 Adjusted PV Module DC voltage at minimum temperature = [Table 1] ___________ [cannot exceed Step 2.4]
Table 1. Module VOC at STC Based on Inverter Maximum DC Input Voltage Derived from CEC 690.7
Microinverter Max. DC Input
[STEP 2.4] (Volts)
34
37
40
43
46
49
52
55
61
64
67
73
76
79
Max. Module VOC @ STC, 1.12
(-1 to -5°C) Correction Factor (Volts)
30.4
33.0
35.7
38.4
41.1
43.8
46.4
49.1
54.5
57.1
59.8
65.2
67.9
70.5
Max. Module VOC @ STC, 1.14
(-6 to -10°C) Correction Factor (Volts)
29.8
32.5
35.1
37.7
40.4
43.0
45.6
48.2
53.5
56.1
58.8
64.0
66.7
69.3
4. Branch Circuit Output Information
Fill in [Table 3] to describe the branch circuit inverter output conductor and OCPD size. Use [Table 2] for
determining the OCPD and Minimum Conductor size.
Table 2. Branch Circuit OCPD and Minimum Conductor Size*
Circuit Current (Amps)
Circuit Power (Watts)
OCPD (Amps)
Minimum Conductor
Size (AWG)
Minimum Metal Conduit
Size for 6 Current
Carrying Conductors
12
2880
15
12
¾”
16
3840
20
10
¾”
20
4800
25
8
1”
24
5760
30
8
1”
*CEC 690.8 and 210.19 (A)(1) Factored in Table 2, Conductors are copper, insulation must be 90°C wet-rated. Table 2 values are based on maximum
ambient temperature of 69°C, which includes 22°C adder, exposed to direct sunlight, mounted > 0.5 inches above rooftop, ≤ 6 current carrying
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Page 3 of 6
conductors (3 circuits) in a circular raceway. Otherwise use Comprehensive Standard Plan.
Table 3. PV Array Configuration Summary
Branch 1
Branch 2
Branch 3
Number of Microinverters or ACMs [STEP 1]
Selected Conductor Size [Error! Reference source not
found.] (AWG)
Selected Branch and Inverter Output OCPD [Error!
Reference source not found.]
5. Solar Load Center (if used)
5.1 Solar Load Center is to have a bus bar rating not less than 100 Amps. Otherwise use Comprehensive
Standard Plan.
5.2 Circuit Power see [STEP 1] =___________ Watts
5.3 Circuit Current = (Circuit Power) / (AC voltage) = __________ Amps
Table 4. Solar Load Center and Total Inverter Output OCPD and Conductor Size**
Circuit Current (Amps)
Circuit Power (Watts)
OCPD (Amps)
Minimum Conductor
Size (AWG)
Minimum Metal Conduit
Size
24
5760
30
10
½”
28
6720
35
8
¾”
32
7680
40
8
¾”
36
8640
45
8
¾”
40
9600
50
8
¾”
41.6
≤ 10000
60
6
¾”
**CEC 690.8 and 210.19 (A)(1) Factored in Table 4, Conductors are copper, insulation must be 90°C wet-rated. Table 4 values are based on maximum
ambient temperature of 47°C (no rooftop temperature adder in this calculation), ≤ 3 current carrying conductors in a circular raceway. Otherwise use
Comprehensive Standard Plan.
6. Point of Connection to Utility:
6.1 Load Side Connection only! Otherwise use the Comprehensive Standard Plan.
6.2 Is the PV OCPD positioned at the opposite end from input feeder location or main OCPD location?
Yes No (If No, then use 100% row in Table 5)
6.3 Per 705.12(D)(2): (Combined inverter output OCPD size + Main OCPD size) ≤ [bus bar size × (100% or
120%)]
Table 5. Maximum Combined Inverter Output Circuit OCPD
Bus bar Size (Amps)
100
125
125
200
200
200
225
225
225
Main OCPD (Amps)
100
100
125
150
175
200
175
200
225
Maximum Combined Inverter OCPD with 120% of bus bar rating (Amps)
20
50
25
60†
60†
40
60†
60†
45
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Page 4 of 6
Maximum Combined Inverter OCPD with 100% of bus bar rating (Amps)
0
25
0
50
25
0
50
25
0
†This plan limits the maximum system size to less than 10 kW, therefore the OCPD size is limited to 60 A. Reduction of Main Breaker is not permitted
with this plan.
7. Grounding and Bonding
Check one of the boxes for whether system is grounded or ungrounded: Grounded Ungrounded
For Microinverters with a grounded DC input, systems must follow the requirements of GEC (CEC 690.47) and
EGC (CEC 690.43).
For ACM systems and Microinverters with ungrounded a DC input follow the EGC requirements of (CEC 690.43).
8. Markings
Informational note: ANSI Z535.4 provides guidelines for the design of safety signs and labels for application to
products. A phenolic plaque with contrasting colors between the text and background would meet the intent of
the code for permanency. No type size is specified, but 20 point (3/8”) should be considered the minimum.
M
NOTE: CEC 705.10 requires a permanent plaque or
directory denoting all electric power sources on or in the
premesis.
CEC 690.54
CEC 690.54 & CEC 705.12(D)(4)
WARNING
DUAL POWER SOURCES
SECOND SOURCE IS PHOTOVOLTAIC SYSTEM
RATED AC OUTPUT CURRENT ______ AMPS AC
NORMAL OPERATING VOLTAGE ______ VOLTS
WARNING
INVERTER OUTPUT CONNECTION
DO NOT RELOCATE THIS
OVERCURRENT DEVICE
AC
DC
PV
AC
DC
PV
AC
DC
PV
AC
DC
PV
Optional AC Disconnect per AHJ
PV SYSTEM AC DISCONNECT
SECOND SOURCE IS PHOTOVOLTAIC SYSTEM
RATED AC OUTPUT CURRENT ______ AMPS AC
NORMAL OPERATING VOLTAGE ______ VOLTS
Optional Solar Load Center
AC
DC
PV
AC
DC
PV
AC
DC
PV
AC
DC
PV
AC
...
CEC 705.12 (D)(7)
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Solar PV Standard Plan — Simplified
Central/String Inverter Systems for One- and Two-Family Dwellings
9. Single-Inverter Line Diagram
PV
DC -> AC
PV
DC -> AC
PV
DC -> AC
DESCRIPTION: (Provide model # if provided)
Solar PV Module or ACM:
Microinverter (if not ACM):
Junction Box (es)
TAG
1
2
3
4
5
6
1
Single-Line Diagram for Microinverters or ACMs
A
B
G
M
M
4 65 72
Main OCPD size: (table 5) ________________________
Combined Inverter Output OCPD: (Table 4)___________
Main Service Panel Busbar: (Table 5) _______________
Equipment Schedule
Branch Circuit OCPDs
(Table 3)
Main Service Panel OCPDs
DC GEC, When Required
3
Branch 1 OCPD size ______
Branch 2 OCPD size ______
Branch 3 OCPD size ______
Solar Load Center
Busbar(Section 5) ________
Check a box for dc system grounding: □ Grounded, □ Ungrounded
For ungrounded dc power systems, EGC is required
For grounded dc power systems, GEC & EGC are required
Refer to CEC 250.120 for EGC installation & Table 250.122 for sizing
Description and Conductor Type: (Table 3)
Current-Carrying Conductors: (for each branch circuit)
TAG
A
Conductor
Size
Conduit/ Conductor/
Cable Type
Conduit Size
EGC:
Conductor, Cable and Conduit Schedule
GEC (when required):
Current-Carrying Conductors:
B EGC:
GEC (when required):
Number of
Conductors
*
Consult with your local AHJ and /or Utility
7
Performance Meter. Required
Main Electrical Service Panel
*
SEE NOTE 1 FOR SPACING REQUIRMENTS
NOTE: 1
THE MAIN SERVICE PANEL, PRODUCTION METER, AND AC DISCONNECT MUST BE WITHIN
8-FEET FROM OUTSIDE EDGE TO OUTSIDE EDGE OF THE EQUIPMENT, THERE MUST BE A
MINIMUM 10-INCH SPACING SIDE TO SIDE BETWEEN THE EQUIPMENT.
(PER AZUSA LIGHT & WATER.)
Solar Load Center? Yes No
Utility External Disconnect Switch. Required
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Page 6 of 6
SOLAR PV STANDARD PLAN - SIMPLIFIED
Microinverter and ACM Systems for One- and Two-Family Dwellings
ROOF LAYOUT PLAN
Items required: roof layout of all panels, modules, clear access
pathways and approximate locations of electrical disconnecting
means and roof access points.
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