17th edition in brief,
1)everything domestic will end up on an rcd unless in steel metal conduit or burried greater than 50 mm.
All bathroom circuits have to be rcd protected, now no zone three- so you can now fit a rcd protected double socket in a bathroom if not in zone
2)items of fixed equipment labeled as such can be non rcd-but in practice most domestic situations will require it to be due to 1
Now all socket outlets are to be rcd protected - previously just for portable equipment liable to be used outdoors. (exception to this is commercial with skilled supervision and control of equipment being used):- example factory,call centre
disconnection times have decreased TT
Earth loop values have decreased, but rule of thumb now 0.8
A forum community dedicated to professional electricians, contractors, and apprentices for residential and commercial work. Come join the discussion about trade knowledge, tools, certifications, wiring, builds, scales, reviews, accessories, classifieds, and more!