On Thu, 16 Apr 2009 09:32:47 +0100, TheOldFellow wrote:
I thought that buried cable should be at least 18 inches down.

Take this with a pinch of salt, but 8 sounds pretty low to me.

For some perspective, it's 12" here (north US) for cable running within a
duct, and 24" for plain ol' cable (I'm not aware of a specific rule about
running armoured stuff underground)

cheers

J.