Rewiring old house (1927). Just installed a Siemens 200amp all in one(overhead feed) on the side of the house. The wall cavity behind the all in one is only 2X4,the bend in the SER would probably exceed code. So plan to run 2" schedule 80 down and under house(short run) for protection,then run exposed 30' to the load center.Question is,does the SER need to be in conduit from the floor into the load center? Thanks in advance, Tom

Not really following the path you describe, but SER cable can be installed exposed under the floor. I can tell you, if there are any bends in the conduit you want to install, you will have a difficult job pulling the #4/0 SER cable through it.

So your question, does the SER need to be in conduit from the floor into the load center, does not describe where the SER would be exposed.

If the SER will only be exposed 30 feet, with the remaining being in conduit, you may want to consider pulling individual conductors.

Get back with more detail if you need more help.

TKRUSSELL,thanks again for your reply. There will only be one bend in the conduit run.There will be a sweep at the bottom of the 2" schedule 80 coming out of the all in one,then an exposed turn to the right.The SER will run from there exposed 30' to just under the load center. Should the SER be in conduit from the point which in comes out of the floor to where it enters the bottom of the load ceter? Sorry for not being to clear in my original post. Tom

You will have a rough time trying to push the SER cable through the sweep, keep in mind you have one large cable with 3 -#4/0 al and 1- #4 wires in the cable, acting as a soild mass of aluminum.

The SER will not need to be in conduit where exposed in the basement.

What you can do is strip the sheathing from the cable where it enters the conduit, and spread apart the wires and push those through the conduit, now you have separate wires that will go through much easier in the conduit.

Where the cable enters the conduit you will need to use a threaded coupling and a cable connector so the cable is physically connected to the conduit, and not just slide through and be flopping around at the end of the conduit.

Thanks for the for the help.