If you are tying multiple knots in det cord should it have a plastic sheath?

• A. Yes
• B. No
• C. It depends
• D. Not allowed

Answer: (B)

The important idea is that detonating cord should stay straight and unknotted. A knot creates a constriction and irregularity in the explosive core, which can crush the core or disrupt the detonation wave, creating weak points or unpredictable initiation. The plastic sheath doesn’t fix this; it’s there for protection, not to make knots safe. So the correct stance is that you should not knot detonating cord at all, and whether a sheath is present doesn’t change that safety rule. (Choices that imply knots are acceptable, optional, or forbidden aren’t aligned with this principle.)