The incident took place around 3.30 PM when Bhura and Intihar, both labourers who migrated from Uttar Pradesh, were fitting tiles at the first floor of the under-construction building over which the high tension wire passed by, a senior police official said.
They were cautious throughout but while operating on a tiles-cutter machine, they accidentally came within the range of the 220 kV cable and were pulled by its force.
A case of criminal negligence has been registered in connection with the matter at Jamia Nagar Police Station and investigators are trying to trace the builder and owner of the under-construction property, the official added.
"The power lines were installed in accordance with law but with time, people started encroaching upon lands below them. The fact that a 220 kV power line was situated above the balcony of a building reflects utter violation of regulations," said Rishi Raj Bhati, spokesperson of Delhi Transco Limited.
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Delhi Transco Limited has also issued multiple notices to many such violators, Bhati said, adding a distance of at least 17.50 metres must mandatory be left on both sides of such high power wires.
Any object up to a vertical distance of 6 metres and horizontal distance of 7.5 m comes within the field of a 220 kV power line and will be pulled towards it.
In many cases -- for instance, in southeast Delhi's Jamia Nagar and Khajoori Khas areas in the trans-Yamuna region -- Transco increased the height of high tension wires but encroachers allegedly ended up increasing floors to their buildings taking advantage of the safety arrangement, an official said.