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Completely closing the cable also makes it impossible to perform normal inspections of the cable and cannot detect cable faults in time. In addition, there must be a sound environment to prevent broken cables from causing accidents.
Avoid the aging and damage of cables to have a good operating environment
To avoid cable aging and damage to have a good operating environment Cable trenches, cable tunnels should have good drainage facilities, such as set up shallow drains, water collection wells, and can effectively drowning, if necessary, set automatic start and stop pumping device to prevent Collect water and keep the interior dry. The longitudinal drainage slope of cable trenches and tunnels should not be less than 1% to 2%, and should be at least greater than 0.5% to prevent the entry of water, corrosive gases or liquids and flammable liquids or gases. Cable trenches, cable tunnels. The cable tunnel should be naturally ventilated, but when the normal cable load makes the air temperature in the tunnel higher than 40 °C ~ 50 °C, natural ventilation and mechanical exhaust ventilation can be used for ventilation. The fan of the ventilation system shall be linked with the fire detector to ensure that the ventilation is automatically stopped when a fire occurs in the tunnel. The cable tunnel shall not be used as the air inlet of the ventilation system.