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Innovative - Responsive - Professional
Electrical Permit Checklist
for Residential
Solar Photovoltaic Systems
Building Services
Contractors must complete and submit this checklist, a roof layout of solar panels and a one-line diagram
online at or in person at Kirkland City Hall.
Project Address:
Parcel No.:
Property Owner Name:
Owner Phone:
Contractor Name:
Contractor License No.:
Contractor Phone:
Describe PV system, including manufacturer and model number of major equipment:
Yes No N/A
PV modules, inverters, and combiner boxes are identified for use in PV systems.
The inverters are listed and labeled in accordance with UL 1741 and are listed for utility interaction. [WAC
51-51 M2302.4]
The AC interconnection point is on the load side of service disconnect. [NEC 690.64(B)]
The system meets all current NEC, City and Washington Cities Electrical Code requirements.
For Split-Bus modules, the AC interconnection is one of the six service disconnects.
Maximum load added to the panelboard is based on the rating of the panelboards bus/main OCPD combination.
Maximum inverter OCPD may be no greater than 120% of the panelboard bus rating minus the panelboard main OCPD
rating in accordance with NEC 705.12(D)(2)(3)(b). Acceptable combinations include: (check combination that applies)
100 amp bus/100 amp main OCPD - 3,840 watts, maximum 20 amp inverter OCPD.
125 amp bus/100 amp main OCPD - 9,600 watts, maximum 50 amp inverter OCPD.
125 amp bus/125 amp main OCPD - 4,800 watts, maximum 25 amp inverter OCPD.
150 amp bus/150 amp main OCPD - 5,760 watts, maximum 30 amp inverter OCPD.
200 amp bus/200 amp main OCPD - 7,860 watts, maximum 40 amp inverter OCPD.
225 amp bus/225 amp main OCPD - 8,640 watts, maximum 45 amp inverter OCPD.
225 amp bus/200 amp main OCPD - 13,440 watts, maximum 70 amp inverter OCPD.
Other - Electrical Permit with Plan Review Required
Note 1: Listed un-altered factory main/bus combination. Alteration of the panelboard main OCPD will require plan review.
Note 2: The circuit conductors and overcurrent devices shall be sized to carry not less than 125 percent of the maximum currents as
calculated in 690.8(A). The rating or setting of overcurrent devices shall be permitted in accordance with 240.4(B) and (C). NEC
Note 3: If a panelboard employs a snap switch rated 30 amperes or less in any branch circuit, it cannot be rated more than 200
amperes unless there is a supply side overcurrent protection at 200 amperes or less withnin the panelboard. This requirement does
not apply to panelboards equipped with circuit breakers. Section 408.36(A) of the NEC.
Electrical Permit Checklist for Residential Solar Photovoltaic Systems - continued
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I have attached an Electrical One-Line Diagram that includes:
Wire sizes
Conduit Sizes
Grounding electrode conductors
Overcurrent devices and sizing
Disconnect co-located with production meter
Yes No
PV system is designed and proposed for a detached one- or two-family dwelling or townhouse not more
than three stories above grade or detached accessory structure that is code compliant to setbacks and
height, or code allows expansion of nonconformity for solar modules.
Modules installed do not exceed the highest point of the roof.
Specify roof pitch (rise/run):
Rooftop is made from lightweight material such as a single layer of composition shingles, metal roofing,
lightweight masonry, or cedar shingles.
The installation will comply with the manufacturer's instructions.
The installation will meet the requirements of NFPA 70 National Electric Code, and all required electrical
permit(s) must be obtained from the Authority Having Jurisdiction to administer the electrical code.
The installation will meet the requirements of the International Fire Code as amended by WA State.
If yes, indicate which option will be used to meet the IFC access regulations:
The dwelling will be sprinklered so no access pathways are required
The total array does not exceed 33% of the total roof area and does not exceed 1,000 sq ft in total area and
18" minimum unobstructed pathways will be provided along each side of all horizontal ridges
Pathways meeting IFC Sections 605. through 605. are to be provided
The PV system is designed for the wind speed of the local area, and will be installed per the manufacturer's
The ground snow load does not exceed 70 pounds per square foot.
Total dead load of modules, supports, mountings, raceways and all other appurtenances weigh no more
than four pounds per square foot.
Enter total dead load of system (psf):
To address uplift, modules are mounted no higher than 18" above the surface of the roofing to which they
are affixed.
Supports for solar modules are installed to spread the dead load across as many roof-framing members as
needed to ensure that no point load exceeds fifty (50) pounds.
The photovoltaic modules and supporting structure will be constructed of noncombustible materials or fire-
retardant treated wood equivalent to that required for the roof construction.
Roof and wall penetrations will be flashed and sealed to prevent entry of water, rodent, and insects.
PV modules are listed and labeled with a fire classification in accordance with UL 1703. [IRC M2302.2.3]
If you answered yes to all of the above questions in Section 3, your project does not require a building permit.
An Electrical permit is still required.
As the property owner or authorized representative of the above listed property, I attest that all information in this
checklist is accurate to the best of my knowledge. Inaccurate information may result in having to modify or remove
the installation.
Applicant Signature:
Applicant Printed Name:
For office use only:
Staff Initials:
Permit #: