Armoured cable depth in a trench

Hi everyone its dragon again


How deep do i have to dig to lay some amoured cable , say in a car park for instance

500mm overlaid with warning tape as far as i know.

Different regs for farm land

feel free to correct

I thought that if you used armoured cable but left it exposed then you were fine. for example along a fencline.

This might be an option instead of digging for you if it is correct

no fence robbie

spade it is then..... lol

not bloody likely its a mini digger for me

don't forget your warning tape!!!

i had a NICEIC bloke pull me up on it once

magic!

how did he know it was not there if the cable was buried vic

500mm.
But then I remembered seeing something over on SF.

"Cables and ducts shall be installed so as to provide the minimum depth of cover detailed
below.

Surface Type Voltage
33kV, 11kV, Low Voltage

Unmade ground, footways & footpaths
775 600 450mm respectively

Roads & Crossings
775 700 600mm

Cultivated ground inc gardens etc
775 700 600mm

Agricultural land
910 910 910mm

On railway property, other than across or near railway track, normal depth of cover shall be
used subject to a minimum depth to comply with the standard railway wayleave agreement.
18.7 Position of Marker Tapes and Protection Tiles
Approved marker tapes shall be installed 200mm above all low voltage cables and 250mm
above all 11kV cables. Where an 11kV cable is installed directly below another cable, it’s
protection tape shall be installed immediately below the higher cable.
Approved protection tiles shall be installed 75mm above all 33kV cables and 33kVjoints.

18.8 Multiple cable spacing
Minimum allowable spacing between adjacent cables is as shown below:-

33kV 450mm
11kV 300mm
LV main 250mm
LV service 100mm


This is the latest spec SP is using now and as can be seen 600mm is the depth for garden electrix "

Very informative comms that is very good information to take in.Thankyou