NABCEP PVDS study plan

Trace a complete PV circuit from array through inverter to point of interconnection, labeling every conductor, overcurrent device, and disconnect on a one-line diagram

Compute string open-circuit voltage at the coldest expected design temperature and confirm it stays below the inverter maximum input voltage

Compute string operating voltage at the hottest expected cell temperature and confirm it stays above the inverter minimum MPPT voltage

Apply NEC 690.7 temperature correction factors to module Voc and record the source of each correction value

Size string conductors and the dc equipment grounding conductor using NEC 690.8 current calculations and 310.16 ampacity tables

Select and justify overcurrent protection for source circuits, output circuits, and the inverter output using 690.8 and 690.9

Calculate maximum PV system voltage and verify 690.7 compliance for a bipolar or ungrounded array configuration

Explain how rapid shutdown requirements in 690.12 constrain conductor routing and combiner placement

Compute roof dead load and wind uplift pressure for a flush-mounted array using ASCE 7 load combinations and module datasheet values

Determine minimum setback and access pathway dimensions required by the International Fire Code and local amendments

Specify rail spans, attachment spacing, and lag screw embedment for a given rafter spacing and module dimension

Identify when structural stamped engineering is required versus prescriptive attachment per code

Perform a shade analysis and translate the result into row spacing and minimum inter-row pitch for a ground-mount array

Evaluate roof condition, age, and covering type to determine whether re-roofing must precede installation

Document structural framing observed in the attic and flag deficiencies that affect attachment strategy

Compare flush mount, tilt mount, and ballasted options for a low-slope commercial roof against waterproofing and load constraints

Measure and record service entrance parameters including main breaker rating, busbar rating, and available panel spaces for a 120 percent busbar rule check

Conduct a shade study at multiple times of day and season and convert results into an annual production estimate

Assess utility interconnection options by reading a sample interconnection application and identifying the applicable review tier

Identify obstructions, clearances, and working space constraints at the proposed point of interconnection

Assemble a permit package checklist covering structural, electrical, and zoning submittal requirements for a typical jurisdiction

Produce a bill of materials and a labeling schedule matching NEC 690 and 705 marking requirements

Write a lockout/tagout and fall protection plan for a rooftop installation day

Draft a commissioning checklist covering insulation resistance, polarity, ground continuity, and IV curve tracing

Perform a full design review of a sample plan set and log every code deficiency found with the governing article

Verify the 120 percent busbar rule and supply-side versus load-side connection math for a service panel upgrade scenario

Reconcile as-built documentation against the approved plan set and describe the change order process

Explain inspection checkpoints a plan reviewer or field inspector will verify for the electrical portion

Complete two timed full-length practice exams and score each domain separately to find weak areas

Re-derive the ten calculations you missed most often without reference material

Build a one-page formula and reference sheet from memory covering voltage correction, ampacity, and load calculations

Review missed items across all four domains and confirm you can state the reasoning, not just the answer