Did you say it's all in conduit? If so, and the conduit is continuous to all of the boxes, and the boxes themselves are proof against water entry, it should be OK. Cable inside conduit is unorthodox, but I don't know of any rule against it, as long as the conduit isn't over-filled.
As long if this conduit is used outdoor then it have to be UF cable not the NM due the wet location and the condastion will build up inside the conduit that something you will have to think about it.
The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France )
Yes, it is all in conduit and all the joints have been cemented and also have weatherproof caulk around every joint. THe PVC conduit says 3/4" SCH 40 and so looks as though it has loads of room as only one 14/2 wire in it. Will condensation build up that much inside the conduit to cause a problem? Could I maybe drill a small hole at the lowest points of the conduit so if condensation does form it will be able to seep through small hole?