I would call it a terminal block with 10 screws. I expect there not to be a symbol for all numbers of terminal blocks. The attached photo shows them in a box. What is the best way to represent and label the box? Should I draw a rectangle around however the block is achieved? Ideally, the surround frame should be associated to the screw points. Is this a case where one must design a symbol for a box containing a 10 screw terminal strip?

Is there a US Letter sized title block?

I am a total beginner and it is not obvious to me from the list of included title blocks.

Thank you.