I came across this little rhyme, reportedly dating back to the early days of electrical power in Britain:

Paul:
I love it, Thats what makes these two countries inseparable, the only difference is the common language.

-Mark-

*applause*

More! More!

I can't find any more relevant to electricity at the moment, but I did learn this little ditty as a kid (you may have heard it):

Poor old Johnny's gone below,
His face we'll see no more,
For what he thought was H2O,
Was H2SO4.

I learned that as a kid!, as "Billy will drink no more."
H2SO4=sulfuric acid.
(Also, when I was about 8 we had a trash can that was labelled "Potassium Cyanide")

electure:
A place I worked for awhile back had a can sitting right next to the Coffee pot, it was labeled in big black letters..KCN, no body new what it meant it looked just like sugar, it was the bosses way to try to cut down on coffee breaks .. didnt work of course.
-Mark-

I've not heard the "Billy" version, but these sort of things often get regional variations.

Even "For he's a jolly good fellow" has a different last line over here!