Con Edison Test B – Gas Safety, Electrical Theory, and Job Procedures Practice Test

Arc proofing is about keeping the energy of an electrical fault from spreading. When a fault occurs in a cable splice or junction, an arc can create intense heat and plasma that could damage insulation and jump to nearby cables. By applying arc-proofing material around the joint or enclosure, the arc’s energy is confined to the affected area, preventing it from propagating to adjacent cables and reducing the risk of fire or widespread damage. This improves safety and allows the fault to be isolated more easily. The other options describe moisture sealing, adding mechanical strength, or increasing conductivity, none of which address containing an arc fault.