We have laid the single core Armoured cable 7 nos ( 2 each
phase & 1 neutral ) to cater our electrical load .
the issue is though we have Glanded the cable both the end
also givan the earthing to the panel both the end we are
facing a heavy sparking at the gland side. what could be
the reason.
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Answer Posted / shantanu mishra
This is definitely a case of improper earthing. The
substation earthing is poor. The panel and armoring of cable
need to be more strongly earthed. During normal conditions
there would not be any sparking butwhen there is any fault
on 11kv line nearby, the ground potential suddenly rises and
so the panel comes at a high potential and sparking take
place between panels and armoring of cables which are not
getting proper earth.
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