A three-phase commercial checklist is a chain of written confirmations in three gates: before you quote, before you arrive, and at commissioning. Each gate closes one class of question — supply, hardware, access — on paper, in that order. The wiring itself is the licensed installer’s craft under local rules; the checklist makes sure nothing reaches site unconfirmed, because at three-phase scale every late discovery is an expensive one.
Key Takeaways
- Three gates, in order: supply confirmed before the quote, documents and access closed before arrival, records completed at commissioning.
- The phases and capacity are written confirmations from site records or the utility — never estimates from the building’s size.
- Procedures and pass values stay with the manual and local wiring rules; the checklist carries confirmations, not instructions.
- If the confirmed supply changes, the job stops at the gate and is re-quoted.
Gate One: Before You Quote
- Three-phase supply, confirmed in writing. Phases present, plus a capacity figure evidenced by the site’s records or the utility — never by the building’s size or the client’s memory. Charge-rate context sits in our single-phase vs three-phase explainer.
- The total fits the confirmation. Add the units at their set currents and compare with the confirmation. Charging is a continuous load — under the NEC it is sized at 125%, so a 32 A charger is designed as a 40 A load; the same arithmetic decides how many three-phase units a supply carries.
- Unit class matched to the confirmed supply. A 22 kW three-phase wallbox class, a dual-connector AC station class up to 43 kW shared, or three-phase portables against existing industrial sockets — chosen against the confirmation, not the catalogue.
- Bays, user group and access model named by the client. Open access, RFID, app or a platform back office — access decided after arrival is a return visit.
Gate Two: Before You Arrive
| Confirmation | Closed by | Evidence it produces |
|---|---|---|
| Exact model and variant documents — datasheet and manual for the unit as ordered | Supplier | Documents on file before dispatch; settings read from paper, not discovered on site |
| Permit and inspection position for this site | The jurisdiction — the installer confirms the position, never assumes it | A filed permit or the position in writing — nobody’s day depends on a guess |
| Platform and access setup: connection details, card sets, client accounts | Client and operator, with the installer | Test credentials ready before commissioning day — access is commissioned, not posted afterwards |
| Cable routes, mounting positions and working access, as surveyed | Installer, signed off by the client | The survey record both parties hold; later route changes are variations, priced as such |
| Existing socket class, where three-phase portables are planned | The survey | A socket record with photos — the CEE classes are compared in our CEE plugs guide |
Gate Three: At Commissioning
The checklist hands over to the records: the settings as left on each unit, a completed session recorded on every connector or outlet, access tested with the client’s own credentials, not a test card alone, and the whole pack filed with the site’s electrical documents. From that record the maintenance rhythm runs — our commercial maintenance checklist assumes exactly this baseline exists. What this checklist deliberately does not contain: procedures, instrument steps and pass values. Those belong to each unit’s manual and the wiring rules of the market of installation, applied by the licensed installer — a general checklist printing them would be wrong somewhere.
The Classes the Gates Sort
For workplace bays, the EV-ACT3204PE is the 22 kW three-phase wallbox pattern — tethered Type 2 cable, RFID and app, IP66, CE. Where two bays share one supply point, the EV-AC03201T runs two Type 2 connectors at up to 43 kW shared (22 kW per connector), with OCPP 1.6J and RFID. Where industrial sockets already exist, portables skip the fixed install: the EV-ACS3205PE at 22 kW on a CEE 32A plug, and the ACS1605PE at 11 kW on a CEE 16A plug, both Type 2 and IP66. The full set is on the commercial EV charging page; project files and scheduling run through contact us.
Frequently Asked Questions
Who confirms the phases — me or the utility?
You record the confirmation; the evidence comes from the site’s documentation or the utility. If neither can confirm, that is a gate-one stop, not a detail to discover later.
Is the checklist different for one dual-connector station than for six wallboxes?
The gates are identical; the records multiply. A dual-connector station is commissioned connector by connector — a recorded session on each.
What if only single-phase supply is confirmed when we arrive?
Stop at the gate. The hardware schedule was written against a three-phase confirmation, so re-quote against the supply that actually exists, not adapt silently.
Related Reading
- Single-Phase vs Three-Phase EV Charging: 7kW, 11kW and 22kW Explained
- Portable EV Charger Types Explained: 10A, 16A, 32A and Three-Phase Models
- CEE Plugs Explained: Choosing 16A or 32A for a Three-Phase Portable EV Charger
- Commercial EV Charger Maintenance Checklist
