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30 CFR § 57.6502
Safety fuse.
TABLE E-1--SAFETY FUSE--MINIMUM BURNING TIME -------------------------------+------------------------ Number of holes in a round | Minimum burning time -------------------------------+------------------------ 1............................| 1 2 minutes. 2-5..........................| 2 minutes 40 seconds. 6-10.........................| 3 minutes 20 seconds. 11-15........................| 5 minutes. -------------------------------+------------------------ 1 For example, at least a 36-inch length of 40-second-per-foot safety fuseor at least a 48-inch length of 30-second-per-foot safety fuse would have to be used to allow sufficient time to evacuate the area.
[58 FR 69596, Dec. 30, 1993] |
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