Free electrical panel schedule calculator (NEC 220)
Electrical Panel Schedule (NEC 220)
Edit circuit descriptions, loads, codes, and poles directly in the CAD table
RESIDENTIAL Demand Calculations
| CODE | DESCRIPTION | LOAD | FACTOR | DEMAND |
|---|---|---|---|---|
| 1 | SMALL APPLIANCE (MIN. 2 CKT @ 1500VA) | 0 | 100% fixed | 0 |
| 2 | Lighting/Outlets | 0 | 100% 1st 3k, 35% Rem | 0 |
| 3 | APPLIANCE W/MOTOR | 0 | 125% largest, 75% rest | 0 |
| 4 | APPLIANCE W/O MOTOR | 0 | 100% | 0 |
| 5 | KITCHEN EQUIPMENT | 0 | 80% | 0 |
| 6 | AC/HEAT | 0 | 100% | 0 |
| 7 | ELECTRIC DRYER | 0 | 100% | 0 |
NEC Article 220 Calculation Method, Code Notes & FAQsClick to expand ↓
How NEC Article 220 Demand Sizing Works
Each circuit’s current is its load over 120 V for one pole or 240 V for two. The breaker is the next standard size that keeps that within 80% of its rating, and the copper size follows the breaker.
The demand load groups circuits by type and applies the NEC Article 220 factor for each: for a dwelling, lighting and receptacles at 100% of the first 3,000 VA and 35% of the rest, motors at 125% of the largest and 75% of the others; for commercial panels, receptacles at 100% of the first 10 kVA and 50% beyond it, continuous lighting at 125%, and kitchen equipment by count under NEC 220.56. The total over 240 V gives the demand current and the standard main breaker above it.
Who uses this engineering tool
- Electricians laying out a service upgrade or a new subpanel
- Contractors checking an EV charger, heat pump or ADU against an existing panel
- Designers and MEP drafters starting a schedule before it goes into CAD
- Engineers who want a quick check of a demand calculation
Frequently Asked Questions
How does it work out the demand load?
The calculator groups circuits by their load code and applies the demand factor NEC Article 220 gives for each. For a dwelling, lighting and general receptacles follow NEC 220.42 (100% of the first 3,000 VA, 35% of the rest); small appliance and laundry circuits are added under 220.52; fixed appliances get 75% for four or more under 220.53; the electric dryer takes 5,000 VA minimum under 220.54; cooking equipment follows Table 220.55; and HVAC follows 220.60 (heating vs cooling, taking the larger coincident load).
How does it balance the phases?
Circuits are assigned to Phase A and Phase B by slot. Slots 1 & 2 are Phase A, 3 & 4 Phase B, 5 & 6 Phase A, alternating down the panel. A 2-pole 240 V circuit spans adjacent slots across both phases equally. The balance indicator computes Phase A vs. Phase B load and flags high imbalance so single-pole circuits can be rebalanced.
How are breakers and conductors sized?
Single-pole 120 V circuits size the breaker so the continuous/non-continuous load does not exceed 80% of rating (NEC 210.20). Conductor wire gauges follow NEC Table 310.16 (75°C terminal rating): 15A → #14 AWG Cu, 20A → #12 AWG Cu, 30A → #10 AWG Cu, 40A → #8 AWG Cu, 50A → #6 AWG Cu.
Can I export this directly into CAD or PDF?
Yes. Download the schedule as a PDF laid out like a CAD panel schedule sheet (odd circuits left, even right, demand calculation and load summary below), print it, or download a CSV. "Send to my email" emails you the PDF: type your address, no account. The PDF drops straight into your drawing set.
Want it drawn as an engineering CAD sheet?
Send the schedule and get a fixed quote for the panel schedule, one-line diagram and power plan in your title block.
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