Panel Schedule Builder
Fill in the panel and the circuits. We’ll check every row against NEC 240.4(D) wire-gauge limits and the 125% continuous- load multiplier on EV charger circuits. Export a permit-ready PDF when you’re done.
Panel information
Frequently asked questions
What is a panel schedule and when do I need one?
A panel schedule is a labeled inventory of every circuit in an electrical panel — position, breaker amperage, pole count, conductor size, circuit description, and connected load. NJ AHJs require a panel schedule on most permit applications for new panels, panel upgrades, and any work that adds or modifies a meaningful number of circuits. It also belongs on the inside of every finished panel cover.
What does NEC 240.4(D) say about wire gauge and breaker size?
NEC 240.4(D), the small-conductor rule, sets maximum breaker amperage for 14 AWG (15 A copper), 12 AWG (20 A copper, 15 A aluminum), and 10 AWG (30 A copper, 25 A aluminum). Larger conductors are sized using NEC 310.16 ampacity tables. This calculator flags any row where the breaker exceeds the maximum allowable for the listed conductor and material.
Why does the EV charger row show a warning?
EV chargers are continuous loads per NEC 625.42 — the circuit and breaker must be sized at 125% of the charger's nameplate. A 48 A charger needs a 60 A breaker (48 × 1.25 = 60). The builder applies this multiplier automatically and warns if the breaker is undersized for the entered VA load.
Can I export this for a permit submission?
Yes. The Export PDF button produces a branded, permit-ready panel schedule with the panel metadata, circuit list, and totals laid out in the format NJ AHJs expect. Malfettone Electric uses this same engine internally on Hudson and Essex County permit packets.