2?" or 3"?

[ptonsparky]

3". 225' is not to long of a run for pvc 90s although if you ever burn through one you will wish you had paid for the rigid or resin 90. Plan your pull and put just one steel 90 in.

 

[ramsy]

..resin 90

2006 UL White book: REINFORCED THERMOSETTING RESIN CONDUIT (DZKT)
Reinforced thermosetting resin conduit has been investigated for use with conductors rated 90?C or less.

Since 250Cal x 4 CCC's in conduit @ 200A exceeds 75?C, PVC use is not permitted by NFPA 70 352.12(E)

2006 UL White book: RIGID NONMETALLIC SCHEDULE 40 AND SCHEDULE 80 PVC CONDUIT (DZYR)
Unless marked for higher temperature, rigid nonmetallic conduit is intended for use with wire rated 75?C or less including where it is encased in concrete within buildings and where ambient temperature is 50?C or less. Where encased in concrete in trenches outside of buildings it is suitable for use with wires rated 90?C or less

 

[JohnConnolly]

The local power company pulls with a steel cable from a truck mounted winch, I don't care how much lube you put on it, you can rip the side out of a plastic 90

Ahhhh...yes. Lube isn't going to help much with the steel cables.

I am pretty sure that the OP wasn't talking about that.

 

[ptonsparky]

For some reason the steel cable does not cut like the pull string or a nylon rope.

 

[don_resqcapt19]

For some reason the steel cable does not cut like the pull string or a nylon rope.

Part of the reason for the cutting action is the heat produced by the friction. A lot of the heat is carried away from the conduit by the steel cable because of its higher thermal mass. Also I would expect that the coefficient of friction between the steel cable and the conduit is less than between rope or string and the steel cable.
Don