Stamped Load Study, measured
Whether to add the load on the existing service, with a calculation an engineer stands behind.
The NEC 220.87 load calculation from your recorded peak, reviewed and signed by a licensed Professional Engineer.
- Price
- $1,800
- Delivered
- 3 days
- Signature
- Signed by a licensed Professional Engineer
Download a finished study
A worked measured load study, every sheet, with the engineer's certification. The facility is one we made up. Everything else is how a report is actually built.
One email, the PDF attached.
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.
| Main breaker 800AT / 800AF, 65 kAIC | Field photo |
| Feeder conductor sizes, MDP to Panel A | Drawing E-101, 2016 |
| RTU-1 / RTU-2 nameplate ratings | Field photo |
| Conveyor control panel load | Stated by owner |
| T-1 transformer impedance | Typical, unverified |
| No PV or storage on site | Stated, confirmed by photo |
Anything unverified is marked here, and the determination does not lean on it.
Where Every Figure Came From
What was read from a photo, what from a drawing and what was stated to us. Anything unverified is marked on the page, and the answer does not lean on 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
- 01Same daySend your records12 months of utility demand data, panel photos and any drawings you have.
- 02Day 1The panel on paperThe single-line rebuilt and every breaker scheduled, so the calculation stands on a verified record.
- 03Day 2 to 3Calculated and signedRecorded peak times 125%, the new load added, and the result reviewed and signed by a licensed Professional Engineer.