I am in the process of adding a new service box to a new pole barn. The source will come from the house 200 amp service box. The main service box has room for the 100 amp breaker I will add. the new service box is a 100 amp unit with 20 breaker slots. I have W 2 AWG four strand underground cable for this 100 foot run. The run will start at the main service box in the basement and then into a crawl space. The ceiling is open in the basement ... thats to say the floor joists are easly accessable ( also in the crawl space ). It will then run outside into a trench that is now 42 in. deep ( other utilities will be going in there too ). My questions are: * am I doing this right so far ? * whats the best / easiest way to run this stranded cable ? Do I need to drill holes in each floor joists like the rest of my household runs ? Or could it be hung from the floor joist (tight to the bottom of them ) say with a hanger like you would use with black pipe. Or is there another way I'm not thinking of ? I plan to use a pro to do the service panel hookups, but I'm justing trying to learn something here and do the meanal prep work.

Is it possible to wire a GFCI receptacle so one can divide the duplex outlet so that one is controlled by a switch and the other is independent and remains hot at all times ? This would not be in a daisy - chain configuration.