Does the Ufer system come to the outside world with a smooth grounding rod,if so I believe that the acorn connector is OK. Whenever we start new construction ,I tie into the footing rebar ,a 5/8in grounding rod and put a right angle bend so that it comes out of the foundation wall near the meter socket at grade level. Chris
Connection to E.G.C. To a ufer system A burndy or other brands of split-bolt cablewire connectors are aproved for the connection to E.G.E. also you can cadweld. But the best way to install a ufer is to install 20ft of #4 bare cu.at the bottom of the footing use tie wire to make contact with the rebar leave enough slack to allow you to make a connection to out of the concret cement wall.
if i remember right, inspectors have told me they arent listed for using the acorns on #4 spiral ribbed rebar ufers, but are ok on ½ in. ground rods, but i'm not sure, all i know is what i read on them, that tagged clamps can be direct buried or encased in crete per labels.
chris, sounds like a good system, but i dont think a Ufer is supposed to be exposed to any weather is it? by definition the ufer is a #4 reinforcement-bar encased in concrete. if you bend rebar out of the foundation outdoors arent you worried that the weather will rust it out eventually? maybe i didnt understand.
edmat, i like the 20' copper too, but i always worry that it will get damaged between exiting the foundation and landing on the grounding bus
Burdy and others make rebar to wire clamps that are certified for concrete and/or direct burial. They come a variety of sizes, #4 wire to 1/2 rebar were not too expensive. I use these item on UFER's and pool grounding and bonding. Easier than an acorn clamp and no grief from the inspectors.
Cindy, The connection to the outside world is an 8ft ,5/8in smooth ground rod that is tied into the footing rebar(Ufer system).It is bent at 90deg and comes through the foundation wall(Wall,mono slab,or stem wall) at grade level and ties into the EGC(#4 bare Cu) with an acorn clamp near the meter socket. Chris
I also tiewire #4 to the rebar at the bottom of the footing at least 20ft in length. I leave enough slack and bring it up past grade level outside of foundation, so it does not get buried during back fill. I bring it into the main disconnect when i run my direct bury service conductors.