we are installing a temp disconnect from a service panel 200'. feeder will be 120/240v we want to hang triplex across field because customer doesn't want to dig and its only for about 3/6months temporary. if I run overhead to disconnect do I have to run EGC on pole also or could I just treat it as a service disconnect and install ground rod at disconnect. I know I could just run quadplex but just asking. I cant find it in code... if it even legal or exist. thanks