Number sequence with prefix

Good Afternoon,
Just introducing myself to dynamo after years of struggling trying to make revit do what I want. Is there a way to apply this to a certain family or family type only? For example, I would like to apply a number and prefix to every electrical receptacle I have in a project. No repeating numbers all with a BX prefix. Any thoughts on this?
Much Appreciated!

The same principles as above is needed just change the input to your numbers that you have and change what the prefix to what you want then just re add the correct part to the elements.

Note: if you have a different question that is outside of the scope of the topic it would be best you start a new topic with your question but read the following post prior to posting.

Thanks @Brendan_Cassidy. I will start a new thread.