# a DC system that was placed in service prior to January 1, 2025, and that is marked Class 5 · acceptance and maintenance tolerances · 3.40. Electric Vehicle Fueling Systems — How far off a US fuel pump, LPG meter or EV charger is allowed to be (NIST Handbook 44)

For a DC system that was placed in service prior to January 1, 2025, and that is marked Class 5 · acceptance and maintenance tolerances · 3.40. Electric Vehicle Fueling Systems, device or commodity is a DC system that was placed in service prior to January 1, 2025, and that is marked Class 5; acceptance tolerance (new or newly repaired device) is 5.0 %; maintenance tolerance (device already in service) is 5.0 %; condition is acceptance and maintenance tolerances; handbook 44 section is 3.40. Electric Vehicle Fueling Systems, verified against its source on 2026-08-20.

- **Device or commodity:** a DC system that was placed in service prior to January 1, 2025, and that is marked Class 5 _(verified: appears in the quote below)_
- **Acceptance tolerance (new or newly repaired device):** 5.0 % _(verified: appears in the quote below)_
- **Maintenance tolerance (device already in service):** 5.0 % _(verified: appears in the quote below)_
- **Condition:** acceptance and maintenance tolerances _(verified: appears in the quote below)_
- **Handbook 44 section:** 3.40. Electric Vehicle Fueling Systems _(verified: appears in the quote below)_
- **Edition:** 2026 _(verified: appears in the quote below)_

## What the source says

> shall be as follows: (a) For a DC system that was placed in service prior to January 1, 2025, and that is marked Class 5, acceptance and maintenance tolerances are: 5.0 %. This paragraph T.2.2.(a) shall expire on January 1, 2034; after that date, all DC EVSEs shall be subject to the tolerances of paragraph T.2.2.(b).

## Source

- https://www.nist.gov/document/2026-nist-handbook-44-section-340

Last verified: 2026-08-20. Review by: 2027-08-20.
Part of [How far off a US fuel pump, LPG meter or EV charger is allowed to be (NIST Handbook 44)](https://referencesource.org/motor-fuel-dispenser-measurement-tolerances-nist/).