Make room for an electric boiler.
The Boiler Ramps Up Before Production
The plant peaks mid-morning, when the lines, the compressors and the process chillers are all running.
A boiler works hardest on the morning ramp, bringing process water up to temperature, then holds a steady draw through production.
Try it at the size you are planning, and at the hour you would run it.
Run this on your own panel →After recovery, 370 A. It fits.
How We Make Room
- 01Add the new load to the peakThe code takes the highest demand the service has recorded, adds a 25% margin, then adds the new load. If the total is above the service rating, the load does not fit.
- 02Find what sets the peakWe measure every circuit at 15-minute intervals and find the loads that land together at each peak. The worst day sets the recorded peak, and the next is often close behind.
- 03Reshape the peakEach change moves or reduces a load at the peak, by staggering starts, changing schedules or controlling speed. The changes act every day, so every peak comes down together, and every load still does its job.
- 04Measure the peak againThe same circuits are measured after the changes. The new load is added to the lower peak and compared with the rating again.
- 05Run the new loadThe four steps above are the calculation, which counts the load on the peak whatever hour it runs. This is the week the facility gets: the load working in its own hours, on a service with room for it.
Counted as the 2023 NEC counts it: the recorded peak at 125%, plus the new load. The calculation follows whichever edition your authority has adopted.
Heat Ahead of the Peak, Into Storage
An electric boiler is usually the load that does not fit on its own. It is counted at its full rating, and because it runs for hours at a time the code adds 25% to it.
A storage tank changes the boiler the plant needs. The boiler heats water overnight and ahead of the morning peak, the tank carries production through the day, and the smaller boiler is the one counted.
Where the plant still does not fit, the upgrade is sized once, against the measured peak, for every load in the plan.