Experimental Study on Fire Resistance Testing Method for Cable Tray Box in Oil Tank Farm
To enhance the accuracy and efficiency of fire resistance testing for cable tray box in oil tank farms,a rapid testing method using insulation resistance as the determining criterion is proposed. Validation experiments were conducted to investi-gate the efficacy of this testing method and assess the fire resistance of cable tray box. The findings indicate that testing cable trough fire resistance by measuring cable insulation resistance effectively captures the failure process under fire conditions. A-dopting 107Ω as the threshold for insulation resistance failure accurately represents the fire endurance limit of cable tray box.