Is there a symbol library for LibreOffice Draw that includes architectural symbols (specifically electrical plan symbols)?

I’m attempting to use LibreOffice Draw to make changes to small architectural plans for electrical layouts and all I need to be able to do this is a symbol library that has symbols like outlets, switches, lights, etc. Is there an “expansion” file of some sort for Draw, or can external symbol libraries be imported?

I am also looking for such symbol library, with outlines like these:

Yes, there is one: GitHub - sschmidhuber/LibreSymbols: A set of gallery symbols for LibreOffice and Apache OpenOffice..

Example:

Don’t forget to set the grid to 0.25 x 0.25 cm!