Primary audience: Contractors
Read the driver input as a specific operating range
Input voltage tells you which supply the fixture’s driver is designed to accept. A printed range such as AC 120–277 V includes its stated operating inputs; it is not a general statement that the fixture works on any commercial circuit. Check the complete label and documentation for the ordered version.
The numbers 347 V and 480 V refer to different nominal supply voltages. Neither is another name for 277 V. A product offered with several driver options may require a different order configuration for the higher-voltage circuit. The fact that the housing looks identical does not establish electrical interchangeability.
Have a licensed electrician identify the actual supply and connection arrangement at the proposed fixture location. A building’s service description is not enough to select every branch-circuit load. This guide explains purchasing information; it does not provide wiring instructions. If the site information and proposed product documentation disagree, resolve the discrepancy before ordering or connecting the fixture.
Compare the voltage labels without merging options
Commercial fixture tables can show ranges, separate alternatives or model-dependent options. Preserve the punctuation and conditions in the source. A slash between options does not always mean one driver accepts every voltage named across the whole row. Confirm which driver the complete order code selects.
| Printed entry | Purchasing interpretation | Do not assume |
|---|---|---|
| AC 120–277 V | Select for a compatible supply within the documented range | 347 V or 480 V compatibility |
| AC 120–347 V | Check the order version supporting that range | 480 V compatibility |
| AC 277–480 V | Check the higher-voltage driver configuration | 120 V compatibility |
| AC 120–277 V or 347–480 V | Resolve which alternative is being ordered | A single universal driver |
These examples explain notation; they are not permission to connect a particular fixture. The exact model label, current documentation and installation instructions govern the selection. Where the documents contradict one another, ask for a written clarification rather than choosing the broader range.
Use the Allmax directory at model level
Our 480 V and 347 V fixture directory reads voltage entries from the product-page model tables. It separates models with a published 480 V option, models with 347 V but no published 480 V option, and pages that print lower inputs only. This is a documented starting point for the fixture schedule.
For example, the WK06 wall pack and AR07 area light publish several input options. The MLH06 linear high-bay pages publish a higher-voltage alternative. Read the row for the required model and carry its input option into the inquiry.
Do not extend those entries to every wall pack, area fixture or high bay. A page without a published high-voltage option should be treated as undocumented for that requirement. Ask for a supported selection before specification. The directory is not a stock-availability statement, and it does not establish which driver version is available for immediate delivery.
Check controls and emergency equipment independently
The driver is only one part of the electrical configuration. A photocell, sensor, emergency battery assembly or other accessory may have its own supply and interface requirements. Confirm that each item is documented for use with the selected fixture version. Compatibility should appear in the submittal, not only in a verbal description.
A 0–10 V dimming description concerns the control interface; it does not describe the fixture’s main input voltage. Likewise, the low-voltage supply of a sensor does not make the complete fixture a low-voltage mains load. Keep the power-input and control-interface fields separate when comparing proposals.
Record how the controls should operate under normal occupancy, vacancy and emergency conditions. Ask the designer and electrician to coordinate the required circuits and accessory instructions. Do not assume an emergency pack listed for one driver version is suitable for every voltage variant. If the project changes voltage after the initial quote, recheck the entire accessory combination along with the main driver.
Prepare a voltage-aware retrofit schedule
Survey each circuit group rather than assigning one voltage to the entire building. List the existing fixture position, proposed model, supply information, mounting type and control requirements. Include photographs of labels where available, while leaving electrical testing and connection decisions to the licensed electrician.
A metal-halide lamp’s wattage does not identify the incoming voltage or the LED replacement configuration. The old ballast arrangement also does not authorize reuse with a complete LED fixture. Define whether the project replaces the entire assembly or uses a specifically documented conversion method. Our replacement guide addresses output comparison without assigning unsupported equivalences.
Before accepting delivery, compare the ordered version and received label with the approved schedule. Hold unresolved mismatches for clarification instead of treating a familiar housing as proof of the correct driver. Send the voltage requirement, fixture quantities and accessory list through RFQ. If voltage is still unverified, state that clearly so a provisional selection does not become an installation instruction.
Document checklist for the handoff:
- Qualified verification of actual supply voltage at each fixture group.
- Driver input designation and full ordering code for every proposed model.
- Control, sensor and emergency accessory input and compatibility documents.
- Installation instructions and a schedule that keeps different supply groups distinct.
Related guides
- Occupancy Sensors, Photocells and LED Dimming
- Emergency Battery Drivers: Compatibility and Output
- Lighting Spec Sheets and IES Files: Submittal Guide
Prepare the contractor fixture schedule.
Browse all buyer guides or send your fixture schedule for a quote.
Follow NEC/local code and use a licensed electrician.