Rigid aluminum risers were used here until the late 1980's but since then, it's been 2" PVC, furnished and installed by the power company. They also require that the connection be threaded (via hub), not lock nuts, but they do that part anyway. They supply and bury their own 1/0 aluminum triplex buried service lateral for anything up to 300 amps for residential.
For risers on poles, same applies, except they use 4" PVC cable guard ("U" guard) up the pole.
[This message has been edited by EV607797 (edited 12-23-2006).]
