I'm a newbie who has been studying for months before completing this "investment". But I am hoping someone with more electrical knowledge than me can tell me if it is o.k. to run my siamese coaxial cables (2-4 each pipe) alongside romex sheathed 110v cable which will be feeding outdoor floodlighting. (Incandescent or halogen now, but maybe CFL's down the road.) The coaxial was standard grade, not shielded. The conduit is the gray pvc. (watertight!) Thanks in advance, Ken