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Recommended number of LV cables in cable truncking

Recommended number of LV cables in cable truncking

Recommended number of LV cables in cable truncking

Hi there,

I came across with a small fire incident within an old building (said to be 40-50 years old) at the incoming LV power supply cabinet. I noticed that there were signs of arcing on the cable trunking (at the bend section) housing the power cables into the cabinet. The cable trunking were 'packed' with quite a number of cables.

Are there any references (Installation Guide, Standards or Code of Practice) that I can refer to, pertaining to the recommended number of cable that could be fitted in a cable trunking system for certain dimensions? I have check the Wiring Regulations 17th Edition, and there was little mention about cable trunking/ducting system(when compared to cable trench method).

Thank you.

RE: Recommended number of LV cables in cable truncking

I've had a copy of something similar to this sheet for a long time, mine is rather shabby and I can't remember where I acquired it. Might be worth a look. http://www.eyreandelliston.co.uk/pdfs/tech_4.pdf

RE: Recommended number of LV cables in cable truncking

Thank you Sir, that is a good start for me. I will try look further into this, ie. cable trunking factor.

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