Cables dragged through 20mm holes in structural steel

[skatingsparks]

Hi all

1.5mm flat twin and earth pulled through 20mm holes drilled though structural steel - got to be a no no - right? You can't just put holes through steel supports?

Client going nuts because i refused to touch another guys electrical work which, among other things that worry me, as a cable route he chose was drilling through the support structural steel numerous times.

[AndyD]

Are the edges of the holes radiused or are they sharp? If the holes aren't sharp and there's not likely to be cable damage then it could be more of a building regs issue rather than an electrical one. Usually penetrations in structural steel supports would need signing off by a structural engineer.