Burying armoured cable in garden - what type of sand?

if you are using sand then something free of sharps or ballast - 'building sand' would be fine, as would 'play' sand. Some types of sharp sand are surprisingly stony Nothing that would cut you if you crushed a handful of it - perhaps try that in the builders merchants yard before you buy.  +1 for some kind of duct or pipe though if you can afford it, so much easier, even if it is not the 'proper' duct that would be used in the street. I have even used scaff pole in the past as an embedded conduit in a funny place where things were shallow and being driven over.

At work we have a lot of cables in 4 inch 'soil pipe' with manhole covers at the changes of direction and we tend to leave a draw rope in,  pulling in a new one each time with the new cable.
Mike

if you are using sand then something free of sharps or ballast - 'building sand' would be fine, as would 'play' sand. Some types of sharp sand are surprisingly stony Nothing that would cut you if you crushed a handful of it - perhaps try that in the builders merchants yard before you buy.  +1 for some kind of duct or pipe though if you can afford it, so much easier, even if it is not the 'proper' duct that would be used in the street. I have even used scaff pole in the past as an embedded conduit in a funny place where things were shallow and being driven over.

At work we have a lot of cables in 4 inch 'soil pipe' with manhole covers at the changes of direction and we tend to leave a draw rope in,  pulling in a new one each time with the new cable.
Mike