I thought that Type SE or SER was only for above ground use...even if in a conduit...right?
Sorry that is wrong. Type USE is limited to underground and outdoor use because it is not fire retardant treated. Type SE and Se-R is permissible in any application were Type USE is allowed as well as for inside of buildings because it is fire retardent treated. Type SE-R has the bare conductor as an individual conductor rather than as an overwrap of the other conductors. The R=round were a "C" would mean Concentric. Type SE-R is permitted in underground conduit. The conduit fill calculation is done by taking the cross sectional area of the cable and assuring that it is less than fifty three percent of the cross sectional area of the conduit. In other words for conduit fill purposes the entire cable is treated as a single conductor.
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Tom H
[This message has been edited by tdhorne (edited 11-26-2004).]
