A service is sized by what a facility could draw, and a year of its own record says what it does draw. We measure the room you have, free the current the peak is wasting, and hold the new load inside the limit, so the chargers, the heat pumps or the new tenant go in on the service you already have.
Fits, with 40 A to spare on a 400 A service.
When a facility wants to add load, the utility offers one route and the panel holds another.
A shape, and it describes no particular facility or utility.
A service upgrade adds supply. It is designed against what the facility could draw, it takes the utility's time, and the facility pays for every ampere of it whether or not the peak ever gets there.
The other route reads what the facility does draw. A year of 15-minute demand shows the real peak, the code allows the new load to be added to that, and where the answer is still tight, the current at the peak that does no useful work can be returned and the new load held under a limit.
Most facilities find room on the second route. The ones that do not get a signed study to size the upgrade against, which is still faster than guessing.
The existing load is the busiest 15 minutes the service carried in 12 months, read from the utility's record or, where there is none, from 30 days on the panel.
The new load is counted under the code's own rules for that equipment: at its full rating, or under the limit a listed load management system holds it to.
Loads that run together and need not, equipment drawing above its duty, phases out of balance. Each is current at the peak that can be returned before any upgrade is sized.
Whether the service can carry the load you want to add: fits, tight or short.
How much of the service is occupied by current doing no useful work, and how much of it can be returned.
The new load held inside the limit every day: chargers, heat pumps and the loads around them staggered, interlocked and capped by a controller, and the limit read on the panel each month.
We read 12 months of your utility's interval data first, with no visit, and that gives a first answer.
We write the panel down circuit by circuit. Sensors go on only where the utility data cannot settle it.
We add the new load to the measured peak with the margin your code requires, and set the total against your rating.
A licensed engineer reviews the calculation and signs it under their own licence.
After recovery, 375 A. It fits.
A 400 A service, chargers wanted in the car park, and a first quote for a service upgrade. Size the chargers and choose when they run: the verdict is the recorded peak counted at the code's margin, plus the new load, against the rating.
Each load we make room for has its own page and its own rule for how it is counted.
Your utility's record of demand every 15 minutes, read with your authorisation. It settles most capacity questions with nothing fitted to the panel.
Where the utility cannot see the panel in question, a sub-panel or a feeder, loggers go on the board for 30 days and record every 15 minutes, the interval your demand is billed on.
The breaker list typed from photographs of the board, so every reading has a circuit name and a rating beside it, and the calculation stands on a verified record.
Loggers are fitted and collected by a licensed electrician with the panel live, and they come off at the end of the window. The install is checked on the visit, because a logger only reads back at the end.
Fits, tight or short, with the measured peak and the rating behind it.
In every reportThe current at the peak that does no useful work, circuit by circuit, and the change that returns each part.
Where the answer is tight or shortThe service read again with the changes made and the new load running, signed on the measured number.
After the changesElectrification starts from 12 months of your utility's interval data, or 30 days on the panel where the utility cannot see it. Nothing is fitted for the first answer.
Wattif performs no electrical work. Any change to the facility is made by a licensed electrician, and the controller that holds the new load inside the limit is ours, run by us.
