---
kind: "section"
citation: "16 C.F.R. § 1615.3"
title: "16"
number: "1615.3"
heading: "General requirements."
url: "https://uscodex.org/cfr/16/1615.3"
---

# §1615.3. General requirements.

- (a) **Summary of test method.** Five conditioned specimens, 8.9 × 25.4 cm. (3.5 × 10 in.), are suspended one at a time vertically in holders in a prescribed cabinet and subjected to a standard flame along their bottom edge for a specified time under controlled conditions. The char length is measured.
- (b) **Test criteria.** The test criteria when the testing is done in accordance with [§ 1615.4](/cfr/16/1615.4.md) Test procedure are:
  - (1) **Average char length.** The average char length of five specimens shall not exceed 17.8 cm. (7.0 in.).
  - (2) **Full specimen burn.** No individual specimen shall have a char length of 25.4 cm. (10 in.).

## Notes

### Amendments

[40 FR 59903, Dec. 30, 1975, as amended at 43 FR 4853, Feb. 6, 1978]

### Authority

Authority: Sec. 429, Pub. L. 105-276; Sec. 4, 67 Stat. 112, as amended, 81 Stat. 569-570; 15 U.S.C. 1193.

### Source

Source: 40 FR 59903, Dec. 30, 1975, unless otherwise noted.

### Amendments

[40 FR 59903, Dec. 30, 1975, as amended at 43 FR 4853, Feb. 6, 1978]