Enter the project name, address, job number, applicable code edition, and system voltage. This information appears on every panel schedule header and on all exports. No submit action is required — fill in each field and proceed to the next tab.

Click the ▾ down arrow button next to + Custom Room to open the standard rooms dropdown list. Select any room name to add it instantly. Click + Custom Room to type in any space not on the standard list. Enter square footage to enable load density checks.

Inside each room, click + Add Fixture to add equipment from the library (60+ items: HVAC, lighting, receptacles, life safety, and specialty loads).

Each fixture row shows two action buttons:
  • ✏ Pencil button — opens the fixture editor to change type, quantity, or wattage without losing assignment history
  • 🗑 Trash button — permanently removes that fixture from the room inventory

Add the Main Distribution Panel (MDP) first — the form opens pre-filled for MDP configuration. Set mains ampacity, AIC rating, and installation location. Then add subpanels (Panel A, Panel B, etc.).


The MDP does not hold individual circuit assignments. It aggregates load totals from all connected subpanels via subfeed links. Assign all individual loads to subpanels.

Method A — ⚡ Assign All Unassigned (recommended): In the Rooms tab, click ⚡ Assign All Unassigned inside any room. The application automatically distributes every fixture type across all subpanels using NEC best-practice rules:

  • HVAC / motors — distributed across panels so no single panel carries the majority of motor load
  • Life safety (emergency, exit, fire alarm) — routed to the panel with the most available capacity
  • General loads — balanced across panels by total load, then by least-loaded phase within each panel
  • 80% capacity rule — panels at or above 80% of mains per NEC 220.87 are skipped

Method B — Assign → (single fixture): Click Assign → next to any fixture. The system selects the best panel and phase automatically for review and confirmation in the modal.

Method C — Manual (Circuits tab): Select a subpanel and click any circuit row to assign manually.

⚠ Always assign loads to subpanels, not the MDP. MDP totals are calculated automatically from connected subpanel data.

Select the MDP panel in the Circuits tab. Click + Add Subfeed to link each subpanel. The MDP schedule displays each subpanel as a 3-pole feed row with the correct ampacity, wire size, and live phase load values drawn from each subpanel's assigned circuits.

The Schedule tab displays the complete panel schedule: two-column odd/even circuit layout, Phase A/B/C dot column center, left/right subtotals, total demand, and calculated amperage per NEC Article 220. Use Export XLSX for a spreadsheet (one sheet per panel) or Print for a print-ready copy. The Summary tab displays load capacity bar charts for all panels at a glance.