On 26/10/18 16:47, Bob Minchin wrote:
Tricky Dicky wrote:
I am looking to use some 50mm X 50mm trunking around the garage to
take mains wiring. I would also like to run some Cat5e cables in the
trunking but I cannot find any that will take a separator and was
wondering if it was acceptable to install smaller trunking within the
larger one and enclose the low voltage cables within?

Richard

I could be wrong but had always assumed the requirement was based on the
need for separation between power and data to reduce
interference/inductive/capacitive coupling.

Putting trunking within trunking might increase the electrical
insulation but the mains cable itself should have more than adequate
insulation anyway.

The IET regs IIRC say that you can put ELV (what normal people call low
voltage, the IET calls extra low voltage) cables in the same containment
as LV (mains) if all the cables' insulation is rated for the highest
voltage present.