Concrete Encased Electrode
- Thread starter stevee
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Concrete Encased Electrode
The clamp has to be listed for rebar and concrete encasement. A Burndy GAR 114C is one that I've used. Another option is to stub up an elbow of 1/2" bar above the footing and use an clamp on it, it will be less money as it does not have to listed for concrete encasement.
Or you can cad-weld your connection.
The clamp has to be listed for rebar and concrete encasement. A Burndy GAR 114C is one that I've used. Another option is to stub up an elbow of 1/2" bar above the footing and use an clamp on it, it will be less money as it does not have to listed for concrete encasement.
Or you can cad-weld your connection.
rasmithircgov.com
Member
- Location
- Florida
Re: Concrete Encased Electrode
One listed for direct burial is what we allow. As far as stubbing up rebar we allow them to do it here but it has to be inside the biulding because the rebar will rust and you will loose your electrode. Also in the wall must be made accessible.In this perticular ART. look at the (OR)in this case..or consisting of at least 6.0 m (20 ft) of bare copper conductor not smaller than 4 AWG.
I believe this means that you could have 20'bare conductor within 2" of the bottom of foundation or footer and tie it to rebar with tie wire. The or's would dictate a non inclusive as and would indicate inclusive would it not? I was taught that, and is inclusive and or is a seperate option.
One listed for direct burial is what we allow. As far as stubbing up rebar we allow them to do it here but it has to be inside the biulding because the rebar will rust and you will loose your electrode. Also in the wall must be made accessible.In this perticular ART. look at the (OR)in this case..or consisting of at least 6.0 m (20 ft) of bare copper conductor not smaller than 4 AWG.
I believe this means that you could have 20'bare conductor within 2" of the bottom of foundation or footer and tie it to rebar with tie wire. The or's would dictate a non inclusive as and would indicate inclusive would it not? I was taught that, and is inclusive and or is a seperate option.
Re: Concrete Encased Electrode
I use two methods. One is exothermic weld, and the other is Burndy Hyground YGHP series 6 taps. As Tom suggested, I prefer to stub up the rebar through the concrete right into the switchgear or nearby. I take it one step further than the NEC requires by specifying all the rebar be either double tied, Burndy HyGround Cross Connectors, or welded.
I use two methods. One is exothermic weld, and the other is Burndy Hyground YGHP series 6 taps. As Tom suggested, I prefer to stub up the rebar through the concrete right into the switchgear or nearby. I take it one step further than the NEC requires by specifying all the rebar be either double tied, Burndy HyGround Cross Connectors, or welded.
Re: Concrete Encased Electrode
A case in point: Ilsco GRC and CGRC clamps are examples of clamps being used in my area. They are marked for direct burial but I can't find any clear indication on them of a re-bar size. looking at the Ilsco UL file, KDER.E34440, I find them listed, but no indication there that these specific clamps are suitable for direct burial or use with re-bar.
The Ilsco catalog says they are suitable for direct burial and lists the re-bar sizes they can be used with. I talked to a UL representative about this. After confering with one of their engineers, he called me back with the response that the Ilsco web site says they are suitable for the application, so they are ok. I would have thought the UL file information for the clamps should have made that clear without needing to rely on information from the manufacturer's web site. I would have thought that the re-bar sizes should be clearly indicated on the clamps as stated in the guide information. This make it very difficult for inspectors and contractors to follow.
I am finding the "real world" situation on this to be rather confused and frustrating from a code enforcement point of view. UL guide information in the KDER category indicates that these clamps should be marked "Direct Burial" or "DB". It also says that clamps intended for use with re-bar are to be marked with the size of re-bar for which they are intended.
A case in point: Ilsco GRC and CGRC clamps are examples of clamps being used in my area. They are marked for direct burial but I can't find any clear indication on them of a re-bar size. looking at the Ilsco UL file, KDER.E34440, I find them listed, but no indication there that these specific clamps are suitable for direct burial or use with re-bar.
The Ilsco catalog says they are suitable for direct burial and lists the re-bar sizes they can be used with. I talked to a UL representative about this. After confering with one of their engineers, he called me back with the response that the Ilsco web site says they are suitable for the application, so they are ok. I would have thought the UL file information for the clamps should have made that clear without needing to rely on information from the manufacturer's web site. I would have thought that the re-bar sizes should be clearly indicated on the clamps as stated in the guide information. This make it very difficult for inspectors and contractors to follow.
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