Precautions of Lead Sheathed Wiring

Precautions of Lead Sheathed Wiring Points : precautions of lead sheathed wiring

1. The cables must be supported by proper metal clips, saddles etc. Which must not be more than 35 cm apart on vertical run and 22 cm on horizontal run for cables upto 7/0.736 mm.
2. Sharp bends should be avoided and at corners a round bend of radius not less 10cm should be used.
3. When the cables are being clipped these should be dressed with a piece of hard wood to make it perfectly straight.
4. Power wiring should be carried separately from the wiring for fans and lights etc.
5. Contact with gas or water pipes, except at one definite bond to the water mains at the point of entry, should be avoided.
6. While crossing a wall the cables must be run in the conduits. While passing through floors the conduit should he continued to a height not less than 1.5 meters above the floors.
7. The lead sheath must be continuous electrically and earthed at some suitable point, preferably at the point of entry.
8. The supports employed must not be of such a material that may react chemically with the sheath.
9. According to lEE regulations the lead sheath should be continuous throughout the installation either by soldering or by bonding with clamps.
10. The cables should be properly protected where liable to mechanical damage.
11. The ends of conduits employed must be filled to remove burrs and bushes may also be used a both ends.
12. The cables should not be run over damp places.