CSLB C-46 Solar (Trade Exam) — All Questions

Before choosing solar, what does DOE advise a homeowner to consider first?

• a.A larger inverter than the array needs
• b.Whether a neighbor has installed solar
• c.Low-cost efficiency measures✓
• d.Moving to a higher electric rate tier

DOE advises knowing your usage and considering low-cost, easy-to-implement efficiency measures before choosing solar, since every kWh saved is one you need not generate. A neighbor's decision says nothing about the home's own load. An oversized inverter adds cost without lowering the load. A higher rate tier raises the bill and is not a planning step.DOE, Planning a Home Solar Electric System

Which roof direction does CSLB's Solar Smart guide tell buyers to look for?

• a.A flat roof under tall trees
• b.A roof facing north under trees
• c.A roof facing south, SE or SW✓
• d.A roof facing due east

The guide tells buyers to make sure the roof faces the southern sky, including southwestern and southeastern directions, and is not shaded. A north-facing plane gets the least sun in California. East-only facing misses the afternoon sun and is not the guide's advice. A shaded roof under trees defeats the purpose of the advice.CSLB Solar Smart

A 9.0 kW DC array feeds a 7.5 kW AC inverter. What is the DC-to-AC ratio?

• a.1.5
• b.1.2✓
• c.16.5
• d.0.83

The ratio is the DC array rating divided by the inverter's AC rating: 9.0 divided by 7.5 is 1.2, a common choice that may clip a little output at midday. 0.83 inverts the fraction by dividing the AC rating by the DC rating. 1.5 does not come from these two ratings. 16.5 adds the two ratings instead of dividing them.NREL PVWatts Version 5 Manual

A 500-watt module has a power temperature coefficient of -0.4 percent per degree C. Its cells run 20 degrees C above the 25 degrees C test temperature. About how much power does it produce, other conditions equal?

• a.About 460 W✓
• b.About 492 W
• c.About 540 W
• d.About 400 W

The loss is 20 degrees times 0.4 percent, or 8 percent, and 500 W less 8 percent is 460 W. Heat lowers power, so the result cannot rise above the rating. 492 W counts only 0.4 percent once instead of per degree. 400 W treats the coefficient as 1 percent per degree, which is too large.NREL PVWatts Version 5 Manual (temperature coefficient)

Modules are rated 45.0 V open-circuit, the lowest expected temperature is -3 degrees C (correction factor 1.12), and the dwelling's system voltage limit is 600 V. What is the greatest number of modules in one series string?

• a.13
• b.11✓
• c.10
• d.12

Each module counts as 45.0 x 1.12 = 50.4 V in the cold, and 11 modules give 554.4 V, under 600 V. 13 comes from dividing 600 by the nameplate voltage and skipping the cold correction. 12 modules give 604.8 V once corrected, which is over the limit. 10 modules are allowed but are not the greatest number that fits.Solar Permitting Guidebook (OPR) standard plan

How do monocrystalline and polycrystalline modules compare, according to DOE?

• a.Monocrystalline is cheaper and less efficient
• b.Mono is more efficient; poly is cheaper to make✓
• c.Polycrystalline is more efficient and costs more
• d.Both have identical cost and efficiency

DOE says monocrystalline panels are more efficient because electrons move more freely, while polycrystalline cells are less expensive to manufacture. This reverses the two cell types. The two types differ in both cost and efficiency. Monocrystalline is the costlier, more efficient type.DOE, Solar Photovoltaic Cell Basics

On a roof plan drawn at 1/4 inch = 1 foot, a walkway between two array blocks measures 1/2 inch. Does it meet a 36-inch firefighter pathway requirement?

• a.No; it scales to 24 inches✓
• b.Yes; it scales to 36 inches
• c.Yes; it scales to 48 inches
• d.No; it scales to 12 inches

One-half inch divided by 0.25 is 2 feet, or 24 inches, which is narrower than the 36-inch pathway. 36 inches would need a 3/4-inch measurement at this scale. 48 inches would need a 1-inch measurement at this scale. 12 inches would need a 1/4-inch measurement at this scale.2022 CRC R324.6 (City of Berkeley checklist)

According to the Solar Permitting Guidebook, where must the location of the rapid shutdown initiation device be shown?

• a.On the module data sheet
• b.On the utility bill summary
• c.On the structural plan sheet
• d.On the site plan drawing✓

The Guidebook says the initiation device's location shall be shown on the site plan drawing. The structural plan covers framing and attachments, not equipment locations. A module data sheet describes the product and has no information about this installation. A utility bill summary has nothing to do with equipment placement on the property.Solar Permitting Guidebook (OPR)

What does a single-line diagram show most directly?

• a.The distance from each module to the ridge
• b.The framing members under each rail run
• c.The street-side fire pathway to the ridge
• d.Electrical path from array to service✓

A single-line diagram shows the electrical path with one stroke per circuit, along with ratings, so you can check strings, breakers and the interconnection. Distances on the roof belong to the roof or site plan. Framing members belong to the structural plan. Fire pathways are drawn on the site and roof plans.City of Berkeley 2022-code checklist

Which information must a permit electrical plan show for both the DC and the AC side of the system?

• a.Setback distances to property lines
• b.Roof pitch and roofing material type
• c.Rafter sizes and spacing in the roof
• d.Conductor sizes and insulation ratings✓

Berkeley's checklist asks the electrical plan to give conductor sizes and insulation ratings on both sides, along with raceways, the service size and labels. Rafter information belongs on the structural plan. Property-line distances belong on the site plan. Roof pitch and roofing type are site and structural information, not electrical.City of Berkeley 2022-code checklist

Which three core drawings do building departments typically ask for in a solar permit set?

• a.A site plan, a structural plan and an electrical plan✓
• b.A floor plan, a plumbing plan and a landscape irrigation plan
• c.A grading plan, a drainage plan and a street lighting plan
• d.A roofing plan, a color plan and a sales plan

Berkeley's checklist is typical: a site plan, a structural plan and an electrical plan with a single-line diagram. Floor, plumbing and landscape plans do not describe the array, its attachment or its wiring. Grading, drainage and lighting plans belong to site civil work, not the solar permit set. A color plan and a sales plan are not permit drawings.City of Berkeley 2022-code checklist

Which drawing shows the building footprint with distances to property lines, the array location and the fire access pathways?

• a.The site plan✓
• b.The electrical single-line diagram
• c.The structural plan
• d.The label schedule

The site plan shows the footprint, distances to property lines, the array, equipment and disconnect locations and the fire pathways. The structural plan shows framing and attachment details. The single-line diagram shows the electrical path, not the property layout. The label schedule lists markings, not locations of pathways.City of Berkeley 2022-code checklist

What should you find first on a plan sheet before measuring any distance from it?

• a.The north arrow on the site plan
• b.The sheet number in the corner
• c.The sheet's drawing scale✓
• d.The revision date in the title block

Every measured distance depends on the scale, so it is the first thing to find. A north arrow gives direction, not size. The sheet number identifies the page, not the proportion. The revision date says nothing about size.CSLB C-46 outline (interpret plans)

On a single-line diagram, a back-fed breaker in the main panel represents what kind of connection?

• a.A load-side connection✓
• b.A ground-mount tie
• c.A supply-side connection
• d.A utility-owned tap

A back-fed breaker on the panel's bus connects the PV output on the load side of the service disconnecting means. A supply-side connection joins ahead of the service disconnect. A utility tap is made by the utility. A ground-mount tie is not a type of interconnection.City of Berkeley 2022-code checklist (CEC 705)

A three-person crew works 2 days of 8 hours each, plus 4 more crew hours for commissioning. At $90 per labor hour, what is the labor cost?

• a.$4,320
• b.$5,400
• c.$4,680✓
• d.$1,800

3 x 2 x 8 = 48 hours, plus 4 gives 52 hours, and 52 x $90 is $4,680. $4,320 prices only the 48 installation hours and leaves out commissioning. $1,800 prices 20 hours, one worker's share. $5,400 charges the 4 commissioning hours to each of the three workers.Estimating (labor), CSLB C-46 outline

A system's net cost after incentives is $21,000 and it saves the owner $1,750 a year. What is the simple payback?

• a.12 years✓
• b.8 years
• c.14 years
• d.10 years

Simple payback is net cost divided by annual savings: 21,000 divided by 1,750 is 12 years. 8 years would need savings of $2,625 a year. 10 years would need savings of $2,100 a year. 14 years would need savings of $1,500 a year.CSLB Solar Smart (breakeven point)

A rail run is 24 feet long and attachments are spaced every 48 inches, with one at each end. How many attachments does one rail run need?

• a.5
• b.6
• c.7✓
• d.8

24 feet is 288 inches; 288 divided by 48 is 6 spans, and 6 spans need 7 attachments counting both ends. 6 counts spans and forgets the attachment at the far end. 5 divides 24 by 5, which is not the spacing. 8 adds an extra attachment that no span needs.Estimating (takeoff), CSLB C-46 outline

A contractor's direct costs for a job are $15,000, and the contractor adds 20 percent of cost for overhead and profit. What is the contract price?

• a.$18,000✓
• b.$20,000
• c.$15,300
• d.$18,750

A 20 percent addition on cost is 15,000 x 1.20 = $18,000. $18,750 treats 20 percent as a margin on price, dividing by 0.80. $15,300 adds 2 percent, not 20. $20,000 adds a flat $5,000 with no basis.Estimating (markup), CSLB C-46 outline

How many business days does the standard home improvement contract notice give a buyer to cancel under section 7159?

• a.Three business days✓
• b.Seven business days
• c.Ten business days
• d.One business day

The standard notice reads that the buyer has the right to cancel within three business days. One day is shorter than the notice states. Seven days is longer than the standard notice. Ten days is longer than the standard notice.California Business and Professions Code 7159

The CSLB solar energy system disclosure document under section 7169 applies to residential systems of what size?

• a.At least 1 kW up to 5 MW AC✓
• b.A residential system under 1 kW AC
• c.Systems of 10 kW AC or less in size
• d.Systems that include battery storage units

Section 7169 covers residential systems of at least 1 kW and no more than 5 MW AC. Systems under 1 kW fall below the threshold. 10 kW AC is the expedited permitting size, not the disclosure scope. The rule is not limited to systems with batteries.California Business and Professions Code 7169

Which document does CSLB's Solar Smart guide tell buyers to get signed by the contractor, subcontractors and suppliers?

• a.A blank warranty form
• b.Mechanics lien release forms✓
• c.The contractor's tax return
• d.A utility letter approving payment

CSLB tells buyers to get mechanics lien release forms signed by the contractor, subcontractor and materials suppliers. A blank warranty form protects nothing and should never be signed blank. A tax return is not a payment protection document. A utility letter does not release liens.CSLB Solar Smart

At least one fire access pathway on a residential roof must be located where?

• a.On the street or driveway side✓
• b.On the side facing the neighbor
• c.On the plane with the most modules
• d.On the rear roof plane away from view

The rule calls for at least one pathway on the street or driveway side of the roof. The neighbor's side is not the stated location. A rear-only layout would leave the street side without a pathway. The plane with the most modules is not what the rule uses.2022 CRC R324.6 (City of Berkeley checklist)

How must a rooftop-mounted PV panel system be installed under 2022 CRC R907?

• a.Only per the manufacturer's instructions✓
• b.To whatever layout the neighbor's roof has
• c.As the roofer prefers on the day of the job
• d.By the method that costs least

R907 says PV panel systems mounted on top of a roof are listed and labeled to UL 2703 and installed in accordance with the manufacturer's installation instructions. The installer's or roofer's preference does not replace the listing's instructions. Another house's layout has no bearing on this roof. Cost is not a basis for departing from the listing.2022 CRC R907 (County of Lake excerpt)

Which documents does San Diego County's checklist want available on site at the PV inspection?

• a.The utility interconnection agreement signed by the buyer
• b.Manufacturer cut sheets and installation manuals✓
• c.The customer's electric bills
• d.The crew's ladder inspection logs

The checklist asks that manufacturer cut sheets and installation manuals be available at inspection so the inspector can check the work against them. Electric bills do not show how the system is installed. The interconnection agreement is a utility document, not an installation reference. Ladder logs do not describe the PV installation.County of San Diego PDS 081S (2025 codes)

Sandia says PV conductors under modules close to a structure, on still, hot days, can reach about what temperature?

• a.35 to 40 degrees C
• b.95 to 105 degrees C
• c.65 to 75 degrees C✓
• d.45 to 50 degrees C

Sandia reports conductor temperatures as high as 65 to 75 degrees C in those conditions, which is why temperature correction matters. 35 to 40 degrees C is ordinary warm air. 45 to 50 degrees C understates the heat trapped under modules. 95 to 105 degrees C is above Sandia's stated range.Sandia, PV Power Systems and the NEC: Suggested Practices

On what area are the ridge setback coverage percentages calculated?

• a.The footprint of the racking rails
• b.The sloped surface area of the roof
• c.The plan-view roof area✓
• d.The area of the whole lot, sloped or not

The percentage thresholds use the plan-view total roof area, the roof as seen from above. Sloped area is larger and gives a different percentage. The racking footprint is not the roof area. Lot area has no connection to roof coverage.2022 CRC R324.6.2 (City of Berkeley checklist)

An attached array of 20 modules, each 21 square feet, adds about 2.8 pounds per square foot of collector area. What is the added dead load?

• a.About 56 pounds
• b.About 11,760 pounds
• c.About 420 pounds
• d.About 1,176 pounds✓

Total area is 20 x 21 = 420 square feet, and 420 x 2.8 is about 1,176 pounds. 56 pounds multiplies the module count by the load per square foot and skips the area. 420 pounds is the area itself, not the load. 11,760 pounds moves the decimal one place too far.NREL Best Practices for O&M of PV and ESS

An array integrated with the roofing material must be rated how under San Diego County's checklist?

• a.Unrated for arrays under 10 kW
• b.Class B, per the UL 1741 listing
• c.Class A, per ASTM E 108 or UL 790✓
• d.Class C, the rating for residential roofs

The checklist requires arrays integrated with roofing material to be Class A rated per ASTM E 108 or UL 790. Class C is a lower rating than the checklist calls for. Size does not exempt an integrated array from the rating. UL 1741 is an inverter standard, not a roofing fire rating.County of San Diego PDS 081S (2025 codes)

Which rafter framing standard does Berkeley accept for a flush-mounted residential array without a project-specific engineered design?

• a.Conventional framing, CRC R802.5✓
• b.The deck-framing tables for a patio cover
• c.A neighbor's recently permitted roof plan
• d.None; an engineered design is required

Berkeley accepts rafters that meet the conventional framing standards of CRC R802.5 for ordinary flush-mounted residential arrays. Deck framing tables are for a different structure. A neighbor's plan has no bearing on this roof. Engineering is triggered by tilt-up racks and other special cases, not every roof.City of Berkeley 2022-code checklist

Where does San Diego County's checklist say roof access points for firefighters should be placed, apart from avoiding ladder placement over doors and windows?

• a.Directly over the front door of the house
• b.At strong points, clear of obstructions✓
• c.At the weakest corner so the roof opens easily
• d.Beneath the lowest row of modules on the roof

Access points go at strong points of building construction where they do not conflict with overhead obstructions such as tree limbs, wires or signs. A spot over the door would put the ladder over an opening. Under the modules the access point is blocked. A weak corner is the opposite of a strong point of construction.County of San Diego PDS 081S (2025 codes)

According to NREL, what typically causes failures of direct-buried PV conductors?

• a.Rodents chewing on them✓
• b.Ultraviolet light
• c.Heat from the inverter
• d.Voltage drop in the trench

NREL says direct-bury failures are typically caused by rodents chewing on the conductors, and that proper soil compaction helps. Buried cable is shielded from sunlight. The inverter is not near the trench and does not heat buried cable. Voltage drop wastes energy but does not damage the cable.NREL Best Practices for O&M of PV and ESS

NREL says drainage and storm-water run-off at a ground-mounted array are what?

• a.Easily corrected after commissioning by regrading
• b.Difficult to improve after the array is installed✓
• c.Handled under the module manufacturer's warranty
• d.Irrelevant to PV performance in dry climates

NREL points out that drainage and run-off are difficult to improve after the array is in place, so grade and drainage belong in the design. If they were easy to correct afterward, NREL would not stress planning them early. Poor drainage can wash out foundations and wiring, so it matters. The module manufacturer does not control the site's grade.NREL Best Practices for O&M of PV and ESS

Which kind of tracker keeps modules pointed directly at the sun throughout the day?

• a.A fixed tilt at the site's latitude
• b.A one-axis tracker following east to west
• c.A two-axis tracker✓
• d.A seasonal manual tilt

DOE says two-axis trackers allow modules to remain pointed directly at the sun throughout the day. One-axis trackers follow the sun east to west only. A fixed tilt never moves. A seasonal tilt changes only a few times a year.DOE, Solar Photovoltaic System Design Basics

According to DOE, what must the mounting structure of an array do?

• a.Last through the length of the product warranty period
• b.Let the modules shift freely whenever strong winds blow
• c.Be replaced with the inverter
• d.Support the array and resist weather for decades✓

DOE says the structure must support the array and withstand wind, rain, hail and corrosion over decades. A warranty period is far shorter than the array's life. Free movement in wind would loosen and damage the array. The structure's life is independent of the inverter's.DOE, Solar Photovoltaic System Design Basics

Which practice does NREL say reduces rodent damage to direct-buried PV conductors?

• a.Burying the cable just under the surface
• b.Proper compaction of the soil✓
• c.Using bare conductor
• d.Leaving the trench open to air

NREL says proper soil compaction is a best practice for reducing this problem. Shallow burial exposes the cable. Bare conductor is unsafe and not allowed. An open trench is a hazard and does nothing to stop rodents.NREL Best Practices for O&M of PV and ESS

When a metallic water pipe is a building's only grounding electrode, what does San Diego County's checklist require?

• a.A bonding jumper to the gas line
• b.A plastic pipe section
• c.A second water meter
• d.A supplemental electrode✓

The checklist requires a supplemental electrode where a metallic water pipe is the only grounding electrode. A second meter does not add an electrode. A plastic pipe section would break the pipe's continuity and add no electrode. A bond to the gas line is not a grounding electrode.County of San Diego PDS 081S (2025 codes)

To qualify for Solar Shade Control Act protection, how must a collector be set back?

• a.No setback applies to systems under 10 kW
• b.At least 10 feet from the property line and 5 feet above the ground
• c.At least 3 feet from the line and 3 feet above the ground
• d.5 feet from the line, 10 feet above ground✓

The Act protects a collector set back not less than 5 feet from the property line and not less than 10 feet above the ground. The two distances are reversed in this choice. 3 feet and 3 feet are less than the Act requires. The Act has no size-based exemption from the setbacks.California Public Resources Code 25982 (Solar Shade Control Act)

Compared with conduit, what trade-off does NREL describe for direct burial of conductors?

• a.The same cost, with little fault risk
• b.Higher first cost, with easier fault finding
• c.Lower first cost, with faults found at the combiner
• d.Lower first cost; faults must be dug up✓

NREL says direct burial costs less at first, but failures must be found by digging up the conductor. Direct burial is cheaper, not costlier, up front. Direct burial has a real fault risk from rodents and soil. A buried fault cannot be located from the combiner alone.NREL Best Practices for O&M of PV and ESS

A DC conduit passes down through a ceiling. Where does San Diego County's checklist require PV markings relative to the penetration?

• a.At the inverter and AC disconnect
• b.Within 1 foot above and below it✓
• c.Within 10 feet above the penetration
• d.Within 3 feet of the ceiling on one side

Markings go within 1 foot above and below penetrations of roof or ceiling assemblies, walls or barriers. 10 feet is the maximum spacing along a run, not the penetration rule. Marking only at the inverter leaves the wiring in the walls unmarked. 3 feet on one side leaves the other side unmarked and is too far.County of San Diego PDS 081S (2025 codes)

How should flashing at a roof penetration be installed relative to the roofing?

• a.So water runs under it from the roofing below
• b.So water pools behind it and waits to drain
• c.So water sheds over it onto the roofing below✓
• d.So sealant alone carries the water past the hole

Flashing is lapped so that water shed from above travels over it and onto the roofing below, never under it. Water running under the flashing reaches the opening and leaks. Pooling behind flashing drives water into the penetration. Sealant alone is not a substitute for lapped flashing.Solar Permitting Guidebook (OPR) inspection checklist

Where must a rooftop attachment anchor, according to the structural plan approach?

• a.At a convenient spot, sealed with sealant
• b.Into the shingle nailing line along the course
• c.Into the sheathing alone, wherever convenient
• d.Into framing at the plan's support points✓

The structural plan shows the location of each support and its attachment into framing, and the inspector checks structural connections against it. Sheathing alone does not carry the loads the plan calculated. The shingle nailing line holds shingles, not an array. Sealant stops water, not uplift, so it cannot justify moving an attachment.City of Berkeley 2022-code checklist

What does DOE advise owners of a solar water heater about roof penetrations?

• a.Maintain flashing and sealant as needed✓
• b.Remove the sealant and flashing each winter
• c.Replace the whole roof covering every five years
• d.Re-torque the flashing screws each month

DOE's maintenance guidance tells owners to maintain flashing and sealant around roof penetrations as needed. A fixed five-year re-roof is not DOE's advice. Removing sealant would open the penetration. A monthly re-torque schedule is not part of DOE's guidance.DOE Energy Saver, Solar Water Heating System Maintenance and Repair

NREL notes that roofing contractors often warrant their workmanship for 5 to 10 years. What should a PV installer do about that when making penetrations?

• a.Follow the roofing and racking makers' details✓
• b.Use the fastest-curing sealant on the market
• c.Drill extra holes so the rails align without effort
• d.Skip the flashing on low-slope roofs to save time

Penetrations made to the roofing and racking details keep the roof assembly as designed, which protects the roofer's workmanship coverage. Speed of cure does not make a penetration conform to the roofing details. Extra holes add leak paths and can void coverage. Low-slope roofs still need flashing and seals at every penetration.NREL Best Practices for O&M of PV and ESS

What rating does San Diego County's checklist call for on outdoor PV equipment?

• a.NEMA 2
• b.NEMA 1
• c.NEMA 12
• d.NEMA 3R✓

The checklist says exposed wiring is listed for wet location and sunlight resistant, and all outdoor equipment is NEMA 3R rated. NEMA 1 is for indoor use and does not keep out rain. NEMA 12 is an indoor industrial rating, not the outdoor requirement. NEMA 2 is an indoor rating that is not weather resistant.County of San Diego PDS 081S (2025 codes)

How should rooftop attachment points be located before the attachments go in?

• a.Space them evenly along the course
• b.Find rafters from the attic and mark to the plan✓
• c.Tap the shingles and mark the spots by their sound
• d.Use the rail length as the main guide for the spots

Attachment points come from the structural plan and the located framing, so each fastener lands in structure. Tapping the shingles is not a sound way to find framing. Even spacing ignores where the rafters actually are. Rail length does not locate framing.Solar Permitting Guidebook (OPR)

What does NREL's sample annual service checklist ask of roof penetrations?

• a.Paint over the roof penetrations
• b.Replace the flashing each year
• c.Remove the sealant to let the roof breathe
• d.Inspect that sealant is not degrading✓

NREL's checklist includes inspecting roof penetrations to be sure sealant is properly applied and not degrading. Annual replacement of every flashing is not part of the checklist. Removing sealant would open a leak path. Paint covers a problem without checking it.NREL Best Practices for O&M of PV and ESS

What does the Guidebook's inspection list say about access around inverters, disconnects and panelboards?

• a.Working space is needed only for the utility meter
• b.Working space is needed around the modules
• c.No working space is needed for listed equipment
• d.Working space for operation and maintenance✓

The inspection list calls for access and working space for operation and maintenance of equipment such as inverters, disconnects and panelboards. Listing does not remove the working space requirement. Modules are not the equipment this working-space item is about. The requirement covers the PV equipment named, not just the meter.Solar Permitting Guidebook (OPR) inspection checklist

What does San Diego County's checklist require for systems with microinverters or integrated inverters?

• a.A rooftop AC disconnect✓
• b.A DC disconnect at the meter
• c.No disconnect; there is no DC wiring
• d.A disconnect at the utility pole

The checklist requires microinverter and integrated systems to have a rooftop AC disconnect. The system still has AC wiring that must be isolable. A DC disconnect at the meter does not serve an AC array. A pole disconnect is the utility's, not the installer's.County of San Diego PDS 081S (2025 codes)

How does the Guidebook's inspection list want AC and DC disconnects and overcurrent protection to be arranged?

• a.They are scattered around the building for safety
• b.They are hidden behind the modules
• c.They are listed, grouped and identified✓
• d.They are unlisted but labeled

Listed AC and DC disconnects and overcurrent protection are grouped and identified. Scattering them makes shutdown harder. Unlisted equipment does not satisfy the list. Hiding them defeats the purpose of identification.Solar Permitting Guidebook (OPR) inspection checklist

What rating must exposed PV wiring outdoors carry under San Diego County's checklist?

• a.Wet-location listed, sun resistant✓
• b.Rated for a dry location, not wet ones
• c.Insulation rated for 60 degrees C
• d.Rated for use inside a dry building

All exposed wiring must be listed for wet location and sunlight resistant. Outdoor wiring sees rain, so dry-only is not enough. Indoor-rated wiring is not built for sun and weather. A temperature rating alone does not address moisture and sunlight.County of San Diego PDS 081S (2025 codes)