New 200 amp service

Hi 200 amp service for a metal framed pole barn
i'm a newbe so be gentle. Question : when installing a service mast
what is the best material to use aluminum or rigid metal conduit. when running branch circuits being that this is a metal building can i get away with using romex or should i use emt conduit. Any help would be very helpful. I guess you should know i'm not a licensed electrician , but i have some electrical experience doing trouble shooting on ac and dc breaker control units for railroad substations .
thanks greg @ dingmans ferry PA
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I would go with a rigid metal conduit mast and EMT or PVC rigid nonmetalic conduit for the wiring. The PVC is easier to work with unless you have some EMT experience and it will hold up better if you have moisture in the barn.
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Not sure where you live, but, it you can, run your service underground. It can save you a lot of problems further on up the road.
So far as your branch circuits, you have have a few options. You can use EMT, MC, PVC, and Smurf [the blue (sometimes grey or tan) flexible corrugated pipe] It really depends on your applications.
If you are using EMT and encounter a situation where it will require a lot of bends, DO NOT use Romex; use MC instead. If there are any burs or sharp edges anywhere, they could cut the Romex's sheathing and insulation. If you have to use EMT, have fun bending--it does the brain good. Just keep in mind that each run is good for 360 degrees.
Greg wrote:

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