During cable laying in channels, joint fabrication is affected by on-site conditions, materials, and craftsmanship, making it a vulnerable point in the cable line. Once a joint failure occurs, the resulting damage can not only cause power outages on the affected circuit but may also endanger nearby operating cables, electrical facilities, and personnel, potentially triggering secondary accidents. If an explosion-proof and fire-resistant protective enclosure is installed on the cable joint, any explosion at the joint will be contained within the enclosure. This prevents the shockwaves and flames from damaging other equipment or harming personnel, effectively preventing the escalation of the fault and minimizing losses.