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// CODE SNIPPET

Section E3611 Grounding Electrode Conductor Connection to the Grounding Electrodes

2015 Michigan Residential Code > 36 Services > E3611 Grounding Electrode Conductor Connection to the Grounding Electrodes
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E3611.1 Methods of Grounding Conductor Connection to Electrodes

The grounding or bonding conductor shall be connected to the grounding electrode by exothermic welding, listed lugs, listed pressure connectors, listed clamps or other listed means. Connections depending on solder shall not be used. Ground clamps shall be listed for the materials of the grounding electrode and the grounding electrode conductor and, where used on pipe, rod or other buried electrodes, shall also be listed for direct soil burial or concrete encasement. Not more than one conductor shall be connected to the grounding electrode by a single clamp or fitting unless the clamp or fitting is listed for multiple conductors. One of the methods indicated in the following items shall be used:

  1. A pipe fitting, pipe plug or other approved device screwed into a pipe or pipe fitting.
  2. A listed bolted clamp of cast bronze or brass, or plain or malleable iron.
  3. For indoor communications purposes only, a listed sheet metal strap-type ground clamp having a rigid metal base that seats on the electrode and having a strap of such material and dimensions that it is not likely to stretch during or after installation.
  4. Other equally substantial approved means. (250.70)

E3611.2 Accessibility

All mechanical elements used to terminate a grounding electrode conductor or bonding jumper to the grounding electrodes that are not buried or concrete encased shall be accessible. [250.68(A) and 250.68(A) Exception]

E3611.3 Effective Grounding Path

The connection of the grounding electrode conductor or bonding jumper shall be made in a manner that will ensure a permanent and effective grounding path. Where necessary to ensure effective grounding for a metal piping system used as a grounding electrode, effective bonding shall be provided around insulated joints and sections and around any equipment that is likely to be disconnected for repairs or replacement. Bonding jumpers shall be of sufficient length to permit removal of such equipment while retaining the integrity of the grounding path. [250.68(B)]

E3611.4 Interior Metal Water Piping

Where grounding electrode conductors and bonding jumpers are connected to interior metal water piping as a means to extend the grounding electrode conductor connection to an electrode(s), such piping shall be located not more than 5 feet (1524 mm) from the point of entry into the building.

     Where interior metal water piping is used as a conductor to interconnect electrodes that are part of the grounding electrode system, such piping shall be located not more than 5 feet (1524 mm) from the point of entry into the building. [250.68(C)(1)]

E3611.5 Protection of Ground Clamps and Fittings

Ground clamps or other fittings shall be approved for applications without protection or shall be protected from physical damage by installing them where they are not likely to be damaged or by enclosing them in metal, wood or equivalent protective coverings. (250.10)

E3611.6 Clean Surfaces

Nonconductive coatings (such as paint, enamel and lacquer) on equipment to be grounded shall be removed from threads and other contact surfaces to ensure good electrical continuity or shall be connected by fittings that make such removal unnecessary. (250.12)

Related Code Sections


Section E3611 Services, Grounding Electrode Conductor Connection to the Grounding Electrodes
The grounding or bonding conductor shall be connected to the grounding electrode by exothermic welding, listed lugs, listed pressure connectors ...
2015 Michigan Residential Code > 36 Services > E3611 Grounding Electrode Conductor Connection to the Grounding Electrodes
E3611.6 Services, Clean Surfaces
Nonconductive coatings (such as paint, enamel and lacquer) on equipment to be grounded shall be removed from threads and other contact surfaces ...
2015 Michigan Residential Code > 36 Services > E3611 Grounding Electrode Conductor Connection to the Grounding Electrodes > E3611.6 Clean Surfaces
E3607.1 Services, System Service Ground
The premises wiring system shall be grounded at the service with a grounding electrode conductor connected to a grounding electrode system ...
2015 Michigan Residential Code > 36 Services > E3607 System Grounding > E3607.1 System Service Ground
Section E3607 Services, System Grounding
The premises wiring system shall be grounded at the service with a grounding electrode conductor connected to a grounding electrode system ...
2015 Michigan Residential Code > 36 Services > E3607 System Grounding
E3610.1 Services, Continuous
conductor required among all of the electrodes connected to it. [250.64(C)] Exception : Splicing of the grounding electrode conductor ...
2015 Michigan Residential Code > 36 Services > E3610 Grounding Electrode Conductors > E3610.1 Continuous
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