How much help with coursework is acceptable? If a university student is set coursework, this is generally a very uncontrolled method of assessment. Lots of different sources can be used to draw knowledge from and often if it's a technical exercise and not a research one citations are explicitly stated as not required.

My question is thus, where would the line be drawn regarding the amount of help that a student gets with their assignment before it becomes plagiarism? 

A few examples:


Asking for help solving a question online.
Asking for help from an expert in their field.
Collaborating with other students on the course.
It depends. Some teachers want all the work to be that of the student and disallow any assistance. Some allow assistance only from teacher or TA (to control amount of help). Some have liberal allowance for collaboration.

Just ask the teacher what is allowed. 

I would just be rather strict with yourself.  Like don't call it "help" when you are just copying.