Commercial Service Upgrades and Three-Phase Power
Service sizing, PSEG Long Island coordination, panel and sub-panel work, dedicated circuits, permits and inspection, and downtime planning for commercial buildings adding equipment, tenants or EV charging.
Buildings outgrow their electrical service when they add air conditioning, kitchen equipment, machinery, a new tenant or a bank of EV chargers. No Shorts Electric sizes, permits and installs commercial service upgrades and three-phase distribution across Nassau and western Suffolk, and plans the shutdown so the building loses power for hours, not days.
What a service upgrade involves
- Load study of what the building draws now and what the new equipment adds, so the new service is sized once.
- PSEG Long Island application, meter and service coordination, and scheduling of the utility work.
- New service entrance, main disconnect, panels and sub-panels, with labeling and an as-built panel schedule.
- Dedicated circuits for the equipment driving the upgrade: kitchen, HVAC, machinery, EV charging.
- Permit filed with the town or village, inspection scheduled, certificate delivered.
Planning the downtime
We stage everything we can before the cutover, schedule the utility for the quietest window the building has, and give you a written sequence of what goes off, when, and for how long. Temporary power is arranged for anything that cannot be down.
Reference: PSEG Long Island service requirements
Questions managers ask
How long is the power off?
Usually a matter of hours on cutover day, planned in advance. The rest of the work happens with the building live.
Do you deal with PSEG?
Yes. We file the application, coordinate the meter and service work, and schedule the utility.
Can you add three-phase to a single-phase building?
It depends on what the utility has available on the street. We check with PSEG Long Island as the first step and tell you before any design work.