Almost nobody upgrades a commercial electrical service because they planned to. It happens because a new piece of equipment cannot be connected, or because something keeps tripping and the answer turns out to be that there is nothing left to give.
The symptoms are boring long before they are expensive, which is exactly why they get ignored.
The signs that capacity has run out
- No spare breaker spaces. The obvious one. Tandem breakers filling the panel is the version of this that looks solved and is not.
- Lights dipping when a compressor or motor starts. A brief dip is normal. A visible dip across the premises every time is a service working near its limit.
- Breakers that trip during normal trading rather than during anything unusual — particularly in the afternoon, when cooling load peaks.
- A panel that runs warm. Worth taking seriously on its own.
- Extension leads and power strips as permanent infrastructure. This is a capacity problem wearing a disguise.
- Equipment that has to be sequenced — staff who know not to run two things at once. That workaround is load management by folklore, and it fails the day somebody new is on shift.
What a load calculation answers
Guessing from the panel label does not work, because the rating on the equipment is what it could carry, not what it is carrying. A proper assessment separates two different numbers.
The first is connected load: everything installed, added up from nameplates. It is always alarming and always overstates reality, because a building never runs everything at once.
The second is demand: what the premises actually draws, measured over a period that includes its real peaks. For most South Florida commercial spaces the peak is a summer afternoon with full cooling and full occupancy, and a study taken in February tells you very little.
The gap between those two is where the answer lives. Plenty of businesses that assumed they needed a bigger service turned out to need the existing one redistributed — a dedicated circuit for the equipment that keeps tripping, a subpanel closer to the load, or a genuinely balanced panel. That is a much smaller piece of work, and it is often the whole fix.
What a service increase actually involves
When the capacity genuinely is not there, the work is larger than replacing a panel and it helps to know the shape of it up front:
- A load calculation and a design, submitted rather than assumed.
- Coordination with the utility, who decide what they can supply and from where.
- New service equipment — for larger commercial services this may be switchgear rather than a panelboard, in a location that has to satisfy both clearance requirements and the utility.
- Possibly a new or upsized transformer, which is the item most likely to set the schedule.
- A permit and an inspection. Treat that as a given on service work and build it into the timeline rather than hoping.
- A changeover window, which is the part most businesses are worried about and the part that is most controllable.
The utility sets the timeline, not the electrician
This is the expectation worth resetting early. The electrical work on a service increase is measurable in days. The utility side — engineering, approval, equipment availability, scheduling a crew — is measurable in weeks or months, and transformer lead times have not been reliable for several years now.
Which means the honest advice is unglamorous: start the conversation before the equipment is ordered, not after it has been delivered and is standing in the stockroom. A business that begins this when it first notices the panel is full is choosing its own dates. A business that begins when a new oven cannot be connected is not.
The time this is cheapest to do
A service increase costs least when it happens alongside work that is already opening things up — a build-out, a refit, a change of use, a kitchen replacement. The walls are open, the space is not trading, and the disruption is already accounted for.
That makes this a question for the design stage of any commercial project, and one worth asking even when the current service seems adequate. Adding capacity while everything is apart is a fraction of the disturbance of adding it later. It is the same reasoning that applies to new construction, where the load schedule is set long before anything is installed.
For a home rather than a business, the equivalent conversation happens at the panel and is a considerably smaller undertaking.
If the panel is already full
Send us your equipment list and a photograph of the panel and its label, and we will tell you whether this is a redistribution or a service increase. Those are very different jobs, and it is worth knowing which one you have before planning around it.
Tell us what the system is doing and we will tell you what it needs — send us the details, or call (305) 359-7312. We work across Miami-Dade, Broward and Palm Beach.
