Cable laying methods

1. How To Install A Grounding Wire In The Cable Tunnel?

Answer: The entire length of the tunnel and trench should be installed with a continuous grounding wire. The grounding wire in question should be connected to all the brackets, the two ends, and the grounding electrodes. The specification of the earthing wire and cable should be as per the design requirements.

The cable lead pack and armouring should also be connected to each other and the earthing wire. In addition to the insulation requirements, the cable frame and the earthing wire should be painted with rust-proof paint or galvanized.

2. What Are The Requirements For Fire Blocking Of Cable Holes?

Answer:

For larger wire and cable penetration holes, such as cable through the floor, the use of fire plugging material should be based on the actual situation.  First, the cable surface should be coated with four to six layers of fireproof paint. Secondly, the length of the hole should be about 1.5m below and should be blocked using fire-resistant materials with a specific strength of the board to fire plugging material. The cable blocking should be dense and without gaps to plug the smoke and fire effectively.

3. What Checks Should Be Noted Before The Torch Ignition?

Answer: The following checks should be carried out;

1. You should check whether the pump is leaking or seeping oil
2. You should check whether the amount of oil in the barrel is more than 3/4 of the capacity of the barrel and whether the screw plug for refueling is tightened