Key technical points of HDPE electrical conduit protection and management of wires and cables:
‌1. Physical barrier
‌ Mechanical damage resistance : Ring stiffness ≥ 8kN/m² (SN8 grade) to resist backfill soil pressure and construction rolling
‌ Impact resistance and buffering : High toughness to absorb external force impact (such as misoperation of excavators) and protect the cable insulation layer
2‌. Corrosion isolation
‌ Tolerant to acid, alkali and salt erosion in the soil (pH 2-12 range), blocking chemical corrosive media from contacting cables
Contains carbon black ≥2.3% The surface resists ultraviolet rays and delays aging and cracking of the sheath
3.Electric field optimization
Smooth inner wall reduces cable traction friction and avoids scratches on the insulation layer (friction coefficient <0.35)
Metal bracket grounding (grounding wire ≥50% of the phase line cross-sectional area) eliminates induced potential
4.Interference shielding
The spacing between strong and weak electric conduits is ≥0.3m, and the intersection is wrapped with tin foil to reduce electromagnetic interference
5.Threading specifications
The resistance of the entire cable threading is ≤50N/m, and a pull box is added to prevent jamming for ultra-long distances (>30m) 613
Bending radius ≥30 times the pipe diameter (DN≤50mm), S-type bending is prohibited