Stamped Load Study, metered
Whether one panel or feeder can carry the new load, decided from its own measured demand.
The same signed calculation where the utility cannot see the panel, from 30 days of our own metering ($1,500 of the price).
- Price
- $3,300
- Delivered
- about 5 weeks
- Signature
- Signed by a licensed Professional Engineer
What You Can Decide With It
The service supports the addition.
The Answer First
Existing demand, the load you want to add, the headroom that remains and the verdict, on one page. A licensed Professional Engineer signs it, and the method is named beside the result.
| 1 | Maximum demand, 12-month utility record | 289.4 kVA |
| 2 | Per NEC 220.87(1), line 1 × 125% | 361.8 kVA |
| 3 | Proposed new load: 6 × EV chargers, 11.5 kW ea. | + 96.0 kVA |
| 4 | Total computed load, line 2 + line 3 | 457.8 kVA |
| 5 | Service capacity, 800 A @ 480 V 3Ø | 665.1 kVA |
| 6 | Spare capacity after addition, line 5 − line 4 | 207.3 kVA |
Demand record: utility interval data, Jun 2025 to May 2026, 15-minute intervals, peak coincident with summer cooling season. Full record appended as Exhibit B.
The Calculation, Line by Line
Recorded peak, the 125% the code requires, the new load and the service rating, each on its own line. Anyone checking the work can follow it without asking us a question.
The Single-Line, Rebuilt
The service entrance, the main breaker, every feeder and transformer, drawn from your photos and drawings and checked against what is in the panel.
| Ckt | Load served | Bkr | VA | VA | Bkr | Load served | Ckt |
|---|---|---|---|---|---|---|---|
| 1 | Lighting, whse high bay | 20/1 | 1,840 | 2,210 | 20/1 | Lighting, office | 2 |
| 3 | Lighting, whse high bay | 20/1 | 1,840 | 1,660 | 20/1 | Lighting, exterior | 4 |
| 5 | Recept, dock office | 20/1 | 1,440 | 1,440 | 20/1 | Recept, break room | 6 |
| 7 | Conveyor ctrl pnl | 30/3 | 4,150 | 6,230 | 40/3 | Dock leveler 1 | 8 |
| 13 | Battery charger, forklift | 60/3 | 9,980 | 9,980 | 60/3 | Battery charger, forklift | 14 |
| 19 | Air compressor C-1 | 50/3 | 8,300 | 2,760 | 20/1 | Recept, maint shop | 20 |
| 21 | — | — | — | 1,440 | 20/1 | Recept, maint shop | 22 |
| 23 | — | — | — | 4,980 | 30/2 | Unit heater UH-1 | 24 |
| 25 | EV charger, proposed | 40/2 | 7,680 | — | — | Space | 26 |
| 29 | Spare | 20/1 | — | — | — | Space | 30 |
Every Circuit, As Found
Each breaker with the load it serves and its rating, and the proposed addition drawn in place. The totals agree with the calculation.
Jun 2025 to May 2026, 15-minute intervals, continuity 99.2%, summer peak season covered, no PV netting applied, no exclusions.
The Measurement Record
30 days of demand from the loggers on your panel, with the period, continuity and anything excluded stated. Every figure in the calculation can be traced back to it.
I hereby certify that this load study, the attached single-line diagram, panel schedules, and calculations were prepared under my direct supervision, and that to the best of my knowledge they comply with NEC 220 and the applicable codes of the authority having jurisdiction.
The Engineer's Signature
A licensed Professional Engineer reviews the whole document and signs it under their own licence. This is the page that gives the calculation its standing.
How It Is Produced
- 01Day 1 to 2The plan and the installThe panel digitized, and a licensed electrician fits the loggers in under an hour with the panel live.
- 02Day 3 to 3330 days recordedDemand recorded on the exact panel through its busiest period, then the loggers are collected.
- 03Day 34 to 36Calculated and signedThe measured peak times 125%, the new load added, signed by a licensed Professional Engineer with the measurement record attached.