Discuss Swa in warehouse chased into concrete floor in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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robo83

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Hi,

Had a look at a job today and there is an swa swinging from one side of the warehouse to the other providing power to machinery.

They have had another electrician quote to chase the swa into the concrete base. I can't see how he can chase any deeper than enough to cover the swa.

Where do we stand regulation wise, as my approaches was to fix a cross beam across to support or run around the warehouse to the machinery.
 
Or use a wire to hang the cable from?
 
If I run around the building it's a lot of work and all high level.

I could get a crossbar braced to the wall and a support leg bolted down to the floor. That was my other approach.

Could I clamp support wire high level lowered down and the cable zip tired to that, of course the wire would be clamped and tight both ends.
 
You could girder clip it across the factory, get a mobile lifter in. Tel's approach with the tray would also work well. Grinding the floor is a bit overkill, what size is the armoured?
 
Thanks for reply.

Chase along the floor maybe 8meters. Running around warehouse around 50.

The swa is 10mm
 
Once you have chased out the floor,how would you fit the SWA? ...just out of interest:)
 
bury it in the concrete in some 25mm galv. conduit. (earthed conduit of course ).
 
Are there any regs
Only in respect to having regard to environmental influences such as fork lift, or under a roof which admits light from the sun causing uv or heat problems. I would say the height would meet regs if any such factors had been taken into consideration. There are no specific heights mentioned (to answer your question) in BS7671 regards cables indoors, however as I say a judgement would have to be made to ensure the height chosen avoids external influences to it which may cause danger or damage.
 

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