What is a ground rod?

A ground rod is a metal electrode placed in soil to connect a building's electrical system to earth. New York's 2025 residential code requires at least 8 feet of soil contact for rod electrodes; ask for the rod dimensions and connection details in the written scope.

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By InstaBids editorial team with AI research agents. Updated 4 November 2026

What this means for your home project

From a safe viewing position, note whether the rod's upper end and connection are exposed; request the installer's protection detail before accepting the work. Source: New York State Department of State, read 2026-11-04.
Request a written rod specification naming its metal, diameter and listing status; compare those details with the rod-material provision in New York's 2025 residential code. Source: New York State Department of State, read 2026-11-04.
Request the clamp documentation showing compatibility with the rod and wire materials and suitability for soil burial; keep it with the written scope. Source: New York State Department of State, read 2026-11-04.
If one rod is proposed under New York's rule, request the resistance-to-earth result supporting the 25-ohm exception so the basis for omitting a second electrode is recorded. Source: New York State Department of State, read 2026-11-04.

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How much of an 8-foot ground rod can be left above ground and still pass inspection?

An exposed top calls for an installation review under New York's residential rule, rather than cutting the rod to match the lawn. “The rod and pipe electrodes shall be installed such that at least 8 feet (2438 mm) of length is in contact with the soil.” Source: New York State Department of State, read 2026-11-04. “The upper end of the electrodes shall be flush with or below ground level except where the above-ground end and the grounding electrode conductor attachment are protected against physical damage.” Source: New York State Department of State, read 2026-11-04.

How do you drive a ground rod, in an area that’s extremely rocky like at a mountain cabin?

For a rocky home site, ask the installer to specify the angled or trenched layout allowed by New York's section E3608.1.4.1 before accepting the work. “They shall be driven to a depth of not less than 8 feet (2438 mm) except that, where rock bottom is encountered, electrodes shall be driven at an oblique angle not to exceed 45 degrees (0.79 rad) from the vertical or shall be buried in a trench that is at least 30 inches (762 mm) deep.” Source: New York State Department of State, read 2026-11-04.

Why do some houses have two ground rods?

A second rod can be the alternative to a resistance test under New York's section E3608.4, so request either the additional electrode or the documented exception. “A single rod, pipe or plate electrode shall be supplemented by an additional electrode of a type specified in Sections E3608.1.2 through E3608.1.6.” Source: New York State Department of State, read 2026-11-04. “Where a single rod, pipe or plate grounding electrode has a resistance to earth of 25 ohms or less, the supplemental electrode shall not be required.” Source: New York State Department of State, read 2026-11-04.

How far apart can I put my grounding rods?

Have the installer mark the proposed pair on a dimensioned drawing; New York's residential provision and California's workplace order each set a six-foot minimum. For New York residential work, “Where multiple rod, pipe or plate electrodes are installed to meet the requirements of this section, they shall be not less than 6 feet (1829 mm) apart.” Source: New York State Department of State, read 2026-11-04. California's workplace electrical safety order separately states: “Where more than one electrode is used (including those used for signaling or communication circuits, radio or television installations, or lightning rods), each electrode shall not be less than 6 feet from any other electrodes.” Source: California Department of Industrial Relations, read 2026-11-04.

Are all grounding clamps suitable for ground rods?

No: for a buried home connection, request the listing documentation for both material compatibility and soil burial under New York's section E3611.1. “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.” Source: New York State Department of State, read 2026-11-04. “Ground clamps shall be listed for the materials of the grounding electrode and the grounding electrode conductor and, if used on pipe, rod or other buried electrodes, shall also be listed for direct soil burial or concrete encasement.” Source: New York State Department of State, read 2026-11-04.

Is it OK to ground an ungrounded panel to the main water main, or do I have to install a grounding rod?

A qualifying water line still needs a supplement under New York's section E3608.1.1.2; for a new foundation, ask about the reinforcing-bar connection described by South Dakota's commission. “A metal underground water pipe that is in direct contact with the earth for 10 feet (3048 mm) or more, including any well casing effectively bonded to the pipe and that is electrically continuous, or made electrically continuous by bonding around insulating joints or insulating pipe to the points of connection of the grounding electrode conductor and the bonding conductors, shall be considered as a grounding electrode (see Section E3608.1).” Source: New York State Department of State, read 2026-11-04. “A metal underground water pipe shall be supplemented by an additional electrode of a type specified in Sections E3608.1.2 through E3608.1.6.” Source: New York State Department of State, read 2026-11-04. South Dakota's commission describes reinforcing bars, or rebar, in new construction: “The provision does not necessarily require that rebar be installed; however, it does require in new construction the stubbing out of at least 6 inches of rebar to tie on a grounding electrode at any time that the footing or the foundation has at least 20 feet of reinforcing bars of not less than 1/2 inch diameter or No. 4 rebar, encased in at least 2 inches of concrete, bonded together by steel wire ties or other effective means per the following illustrations.” Source: South Dakota Electrical Commission, read 2026-11-04.

Sources

2025 Residential Code of New York State, sections E3607–E3611 — New York State Department of State; published 2025-07; read 2026-11-04.
Title 8, section 2395.83: Made Electrodes (workplace electrical safety orders) — California Department of Industrial Relations; published 1986-08-27; read 2026-11-04.
Tool Box: Grounding Electrode Systems — South Dakota Electrical Commission; read 2026-11-04.