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522.6.1 Impact (AG).

Have you every said: " I haven't got a grommet or bush so I'll just run the cable through the sharp edged metal hole anyway. It'll be O.K?"

Well, 522.6.1 says: "Wiring systems shall be selected and erected so as to minimise the damage arising from mechanical stress, e.g. by ABRASION, PENETRATION, TENSION, or COMPRESSION, during installation, use or maintenance."

The old familiar expression comes to mind: for the want of a nail the horseshoe was lost, and its following disastrous consequences. For the want of a grommet, materials and correct installation lives were lost.

https://www.youtube.com/watch?v=Ql16ggFvc_g

Z.

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0 lyledunn over 5 years ago

Rose park Care Home January 2004. Fourteen dead. Ignition source; arcing where cable passed through knockout in distribution board. No grommet fitted.

Of course as the introduction to the video indicates, it normally takes a series of things to go wrong. Nonetheless, rare as it might be, really important to properly secure cables and protect them as they pass through knockouts to guard against potential arcing.
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0 lyledunn over 5 years ago

Rose park Care Home January 2004. Fourteen dead. Ignition source; arcing where cable passed through knockout in distribution board. No grommet fitted.

Of course as the introduction to the video indicates, it normally takes a series of things to go wrong. Nonetheless, rare as it might be, really important to properly secure cables and protect them as they pass through knockouts to guard against potential arcing.
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522.6.1 Impact (AG).

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