VM installation in my street today using microduct for FTTP.
I wasn't at home when the trench was open but it looks more like 300mm deep, rather than 500mm.
When the cabinet plinths were installed, the elbows for the approx 76mm duct into the cabinet were set at around 300mm deep.
Unconnected work last year to repair the 3 phase power cable, exposed the 1970s unducted, wire armoured OR telephone cables - and they were only around 150mm deep, literally just beneath the sub-base of the pavement.
If you look carefully at the left of the trench in the centre, there is a dark patch in the chalk, within that is the elbow from the stop tap of a blue polythene water pipe.
I think someone has posted on here before, the OR guide which shows utilities placement in pavements, both laterally from the kerb and depth. Telecoms are always near the top, gas, water and particularly HV electricity (> 450v ac) are much deeper.
Edited by sidef (Mon 20-May-19 18:49:22)