Floor boxes on raised access floor

[sparks1234]

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What options are there for wiring 3-compartment floor boxes in a raised access floor? obviously the best job is usually going to be in an electrak type system....problem....expense, the busbar is not exactly cheap and the tap offs are over twenty quid each.
Another option is trunking and flexible conduit, but what regulations apply to using twin and earth fixed to the pedestals? or laid on cable tray....over to you

 

[Spudnik]

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[AMST09]

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[sparks1234]

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[Spudnik]

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