Proper way to flash/weatherproof wall penetrations? (ie electrical, plumbing)

[tinybackyardhouse]

Hi all
I'm wondering about the proper way to ensure water does not get in where wall penetrations are made for things like electrical and plumbing
Should I box out the opening like it was a window and add a drip edge behind the WRB?

[Alan Gage]

http://www.extension.umn.edu/distribution/housingandclothing/M1301.html

http://www.polyguardproducts.com/products/architectural/datasheets/Wall%20Penetration%20Flashing%20Kits.pdf

http://www.edswaterproofing.com/modules/news/articles-through__wall_flashing~3A_an_important_defense_against_moisture_penetration.html

[rocking23nf]

silicone is all we ever used when i was an electrician.

[tinybackyardhouse]

Thanks for the links Alan. I figured there must be commercial products out there to do this. I did some more searching and found this one too http://www.quickflashproducts.com/index.html