How do you ground a 200 amp service?
What size wire do you run to a ground rod?
The NEC code specifies that a solid copper wire used to connect to a ground rod must be at least either #6 or #8 gauge (depending on the size of your electrical service cable). #6 cable cable will always satisfy the sizing requirement, though in some cases larger is desirable.
What size should my ground wire be?
For ground connection, it's better to use an adequate size wire. In the case of normal wiring, you can use 100 amp service at 150 feet distance. For ground wire, the adequate size is 8 gauze for 100 amps.
using larger wire will not hurt anything or cause any overload. The larger wire will cost more, the pathway or where it has to fit, and the physical size of the connecting means (ie.
The 225-ampere rating is greater than the 200-ampere row but less than the 300-ampere row. Follow that line across to find the minimum size copper wire EGC to be 4 AWG, and for aluminum or copper-clad aluminum, a 2 AWG minimum size EGC would be required.
With too-small a ground wire, the breaker cannot magnetic-trip because it cannot flow enough current to hit 10x, because of the too-high resistance of the wire.
Proper Grounding Rod
In most cases, pipe or rebar can be used. The grounding rod needs to be made of galvanized steel and also needs to be at least four feet in length for best results.
The only legal ground rod must be installed a minimum of 8-foot in the ground.
Conductors that are directly buried must be identified for that use as stated in 310.10(F). In general wire type equipment grounding conductors can be bare, covered or insulated as stated in 250.118(1). Bare copper conductors are also used as grounding electrodes in 250.52(A)(3) and 250.52(A)(4).
If the facility being grounded has a life expectancy of less than 15 years, a galvanized ground rod is appropriate and will provide the most cost-effective solution. For installations with a longer service life, copper-bonded ground rods are the best fit.
A fundamental component of safety and protection for your business and/or home's electrical system is proper grounding. For this reason, one or more ground rods are required on your property by the National Electrical Code (NEC) and local building codes.