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Section E3611 Grounding Electrode Conductor Connection to the Grounding Electrodes
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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:
- A pipe fitting, pipe plug or other approved device screwed into a pipe or pipe fitting.
- A listed bolted clamp of cast bronze or brass, or plain or malleable iron.
- 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.
- Other equally substantial approved means. (250.70)
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]
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)]
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)]
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)]
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)
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 ...
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