Cable armour earthing
Cable armour earthing
(OP)
We have LV (415V) 3 core Steel Wire Armoured cable on site where the Steel Wire Armour has been earthed every 30 metres along its length. Has anybody any experience of this practice? The site contains explosive materials.






RE: Cable armour earthing
We ground multi-conductor cable at each end, ensuring armor is electrically continuous throughout the length. For single conductor armored cables we ground at the midpoint.
This is the same method we use even if in hazardous locations, and at all voltage levels.
The only exception I have to this are cables that are armored, do not have an outter sheath, and are part of our propulsion system (VFD). I don't have that scenario, but if I did, the OEM requires the armor to be earthed "at frequent intervals".
RE: Cable armour earthing
RE: Cable armour earthing