Hi Greg
Hi,
You said: "4 wire service entrance cable"..
Is this a residence or what? If it is a residential application...you do not need a 4 wire cable...you need an SE cable which has two insulated conductors in it and a bare neutral..
a ser cable has four..two hots, neut, and grnd..this is for feeding sub panels..
If he is going inside 50' the panel he is heading to must be a 'sub panel'. There would have to be a service disconnect previous to that 50' run.
Can you think of a code complaint way to feed a panel 50' inside a residence with 2 wire SE?
Bob