NH-YJV22 fire-resistant power cable is a fire-resistant, armored, cross-linked polyethylene insulated power cable widely used in high-rise buildings, subways, tunnels, power stations and other places with high fire protection requirements.

Common faults and their solutions

Possible causes and solutions for the fault phenomenon

Low insulation resistance cables are affected by moisture, damaged sheaths, and local drying or replacement of damaged sections

Re establish equipotential connection due to charged induced voltage or poor grounding of the armor layer

TDR detects mechanical damage at the breakpoint, looseness of the joint, and re connects or replaces it after positioning

Voltage withstand test, insulation breakdown, aging, manufacturing defects, replacement of the entire cable section

Selection and laying suggestions

Key selection points:

High rise building fire protection circuit: NH-YJV22 (fire-resistant+flame-retardant) must be selected.

Direct burial laying: PVC pipe protection is required to prevent armor corrosion.

Installation precautions:

Bending radius ≥ 15 times the outer diameter of the cable (to prevent damage to the insulation layer).

Avoid laying parallel to thermal pipelines (high temperature affects fire resistance).