16 C.F.R. § 1507.3 Fuses.
Title 16 - Commercial Practices
(a) Fireworks devices that require a fuse shall: (1) Utilize only a fuse that has been treated or coated in such manner as to reduce the possibility of side ignition. Devices such as ground spinners that require a restricted orifice for proper thrust and contain less than 6 grams of pyrotechnic composition are exempted from §1507.3(a)(1). (2) Utilize only a fuse which will burn at least 3 seconds but not more than 9 seconds before ignition of the device. (b) The fuse shall be securely attached so that it will support either the weight of the fireworks device plus 8 ounces of dead weight or double the weight of the device, whether is less, without separation from the fireworks device. [41 FR 22935, June 8, 1976, as amended at 61 FR 67200, Dec. 20, 1996; 61 FR 67200, Dec. 20, 1996]
Title 16: Commercial Practices
PART 1507—FIREWORKS DEVICES
§ 1507.3 Fuses.