Final answer:
The recommended length of overlap when taping 2 lengths of detonating cord together with electricians tape is typically around 10 times the diameter of the cord.
Step-by-step explanation:
The recommended length of overlap when taping 2 lengths of detonating cord together with electricians tape is typically around 10 times the diameter of the cord. This ensures a secure connection and minimizes the risk of the cord separating during detonation. For example, if the cord has a diameter of 5 mm, the recommended overlap would be around 50 mm.