Electrical reviewers bounce a solar conductor conduit schedule that is really a wish: “10 AWG in EMT” with no material, no insulation, no fill, and no temperature story. The inspector is going to ask what is in the pipe. The plan checker is asking the same question earlier. If the SLD cannot answer it, the permit waits and the truck waits with it.
Athol Energy puts conductor and conduit notes on the electrical single-line as part of permit design, with a keyed schedule when the AHJ or the commercial three-line needs more rows than a residential homerun. QA looks for missing callouts before release. The notes below are the rejects we still see in Massachusetts, Rhode Island, Connecticut, New York, and Pennsylvania, without pretending those states share one fill table.
What a solar conductor conduit schedule has to list
For each circuit: from/to, conductor size, material (copper or aluminum), insulation type, temperature rating, quantity of current-carrying conductors, EGC size, raceway type and size, and any ambient or rooftop condition you used. If that feels long, it is still shorter than a comment letter. A residential SLD can carry this at the homerun. A commercial three-line often needs a table. Either way, the inspector has to find it without a phone call.
The code family is NFPA 70 [VERIFY URL]. Name the edition the AHJ enforces. [CONFIRM AS OF 2026-09-19] Conditions of use (rooftop, attic, exterior, underground) change ampacity. If you ignored rooftop adders the town is using, the schedule is fiction. Do not copy a Florida attic note onto a Vermont garage. Do not copy a garage note onto a black EPDM roof in July.
Fill has to be possible. 12 conductors in a 1/2 inch EMT that cannot hold them is a math fail, not a philosophy fail. If you used PVC, EMT, IMC, or cable tray, name it. “Conduit” is not a type. Liquidtight on a rooftop needs a sunlight note if you used a product that requires it. If the product is not sunlight rated, do not draw it on an exposed roof run.
Circuits people forget to schedule
Module-level trunk cables are still conductors. Put the manufacturer cable SKU on the SLD or the schedule. String DC homeruns need polarity and whether they pass through a combiner. Inverter AC output to the point of connection is the circuit AHJs read first. Supply-side taps need conductor size to the tap and to the inverter, not one number pretending to cover both. Battery circuits, if in the permit, get their own rows. EVSE, if in the permit, gets its own rows. “See other drawing” with no drawing is a bounce.
Grounding electrode conductors and bonding jumpers to metal raceway or array rails show up in inspection even when plan check slept. Put them on the schedule or a grounding note that is specific. “Bond per NEC” is in the same family as “conductors per NEC.”
Communication and CTS wiring usually do not belong on the power schedule. If the AHJ wants them, a separate note is cleaner than mixing Cat5 with 10 AWG. Do not hide a 120 V receptacle for an inverter in an unsized “misc” row.
How the schedule must match the rest of the set
Identity again. The roof plan penetration count, the SLD homerun, and the schedule raceway have to be the same path. If the schedule says 1 inch EMT and the roof detail shows two 3/4 inch boots, someone is wrong. Cut sheets for cable and fittings belong when you specified a special product. How solar permit design works is drawings first, then interconnection. The utility file should not invent a different AC conductor size for the same inverter output. Keep interconnection sketches consistent even if they are simpler.
PE seals on electrical sheets include this schedule if it is on those sheets. Changing conductor size after a sealed SLD is a reseal or at least a PE conversation. Changing it after inspection is an as-built. Use as-built drawings rather than a handwritten note on the inside of the panel door.
OSHA electrical pages such as OSHA electrical [VERIFY URL] are worker-safety context. They do not replace the AHJ schedule. Do not staple OSHA PDFs into the permit set to look thorough.
Field substitutions that should have been as-builts
Upsizing pipe to make a pull is common and usually acceptable if you as-built it. Downsizing because the elbow did not fit is not. Swapping aluminum for copper without a drawing change changes terminations and lugs. Swapping THHN for a cable assembly changes the raceway story. If purchasing bought a different inverter with a different output current, the AC conductors may no longer be right. That is not a schedule footnote. That is a new SLD.
Underground runs on ground-mounts need burial depth notes the AHJ asked for, warning tape if they asked, and a route that matches the site plan. A schedule that says “UG to pad” with no size is the same bounce as a blank homerun. Rock in Pennsylvania and frost in New England change depth conversations. Put the depth you are using. If you do not know yet, the civil or the installer has to decide before issue, not after a failed trench inspection.
Send the comment letter. Call Athol Energy at +1 (209) 266-2669 with the SLD and a photo of the pipe if this is an inspection fail. Rush can add missing insulation types. Rush cannot legalize a fill you already built too small. Pull a larger pipe or reduce conductors, then as-built the truth.
Residential notes vs commercial tables
An 8 kW roof with one AC homerun can live on the SLD if every value is there. A 400 kW roof with six inverters, a combiner, a transformer, and a 400 A switchboard needs a table with circuit IDs that appear on the three-line. Do not give the commercial reviewer a residential one-line with “feeders per NEC.” They will send it back, and they will be right. Do not give a small-town residential reviewer a 40-row industrial schedule that lists spare circuits you are not installing. They will pick a spare and ask where it is.
Temperature columns are where C&I sets look professional and still fail. If the rooftop duct bank is in sun on EPDM, the ambient is not office temperature. If the garage run is 20 feet, do not apply the rooftop adder to the whole homerun without a split. Split the circuit in the schedule at the condition change. That is extra rows. Those rows prevent ampacity comments that eat a week.
Neutral and grounded conductor notes matter on three-phase commercial. A missing neutral size on a 480 V inverter that does not need one should be explicit (“no neutral”). A 208 Y inverter that does need one should not hide it. Reviewers hunt that. So do utility engineers on the interconnection three-line.
Color and identification notes belong when the AHJ asks, or when you are in a plant that already has a color standard. Do not invent a color standard that fights the existing building. Ask the facility electrician. Put their standard on the schedule if they have one.
Pulls, derates, and the notes crews skip
A schedule that is legal on paper still fails if the pull is impossible. Long rooftop EMT with four 90s and no pull point is a field change waiting to happen. If you know the path has to jog around RTUs, show a pull or a larger pipe. Inspectors who have pulled wire will comment even if plan check did not. We would rather add a box on the SLD than as-built a mystery LB that is now in a fire path.
Parallel conductors need to be identified as parallel, with equal length notes if the AHJ wants them. Two 250s pretending to be a single conductor in a row labeled “feeder” is how a commercial reviewer asks for a proper feeder schedule. Say parallel. Say quantity. Say raceway count.
Flexible whip at the inverter is still a conductor. Put the length limit if the manufacturer has one. Putting “whip per mfr” with a 20-foot field whip is an inspection argument. If the whip is part of the listed assembly, the cut sheet should say so. If it is field wire, schedule it.
DC string wiring inside arrays is often “per manufacturer” and that is fine if the product is listed that way. Once you leave the array boundary into a homerun you designed, it is your circuit. Combiner outputs need ampacity that matches fused inputs. A combiner schedule that lists 15 A fuses and 10 AWG output for a current that needs more is a math comment. Show the math on a calc sheet keyed to the schedule if the AHJ asked for calcs. Do not hide it in a spreadsheet the inspector will never see.
Roof expansion joints and building separations need a cable or conduit strategy. Rigid pipe across a joint fails. If the SLD pretends the homerun is one straight EMT from ridge to garage, and the building has a joint, the field will cut the pipe. Put the joint. Put the flex. That is a conductor note even though it looks architectural.
Label the circuit IDs on both ends in the field the way they appear on the schedule. PTO photos of unmarked pipes make utilities ask which homerun is which on a six-inverter roof. The schedule is not finished when the PDF is issued. It is finished when the pipe is marked.
Put size, type, fill, and conditions on a sheet the inspector can hold. That is the entire job of a solar conductor conduit schedule, whether it lives as SLD notes or as a table. When those numbers match the pipe on the wall, plan check and inspection finally stop arguing about wire.