True or False: The risk of an arc is low when load is broken with a hot-line clamp.

True or False: The risk of an arc is low when load is broken with a hot-line clamp.

• A. True
• B. False
• C. Not sure
• D. Depends

Answer: (B)

Breaking load current on a live line always carries arc risk. Even with a hot-line clamp, the current can’t be interrupted instantaneously, and the energy stored in the line’s inductance keeps pushing current as the contacts separate. That continuing current forms a plasma path between the contacts, producing an arc, which can cause intense heat, light, and shock hazards to the worker and damage equipment. The clamp may be used for certain live-line tasks, but it does not eliminate the arc risk; proper de-energizing and the use of appropriate PPE and procedures are essential whenever possible.

Breaking load current on a live line always carries arc risk. Even with a hot-line clamp, the current can’t be interrupted instantaneously, and the energy stored in the line’s inductance keeps pushing current as the contacts separate. That continuing current forms a plasma path between the contacts, producing an arc, which can cause intense heat, light, and shock hazards to the worker and damage equipment. The clamp may be used for certain live-line tasks, but it does not eliminate the arc risk; proper de-energizing and the use of appropriate PPE and procedures are essential whenever possible.