Water Meter Ground Wire Size

Buried metal water pipe makes a good ground for the electrical system and is commonly used for grounding the homes electrical system.

Water meter ground wire size.

I m trying to interpret and apply the 2017 nec bonding requirements from 250 104 b to my existing home gas line. A copper ground rod is driven at least 8 feet into the ground. The service panel ground wire must be firmly attached to the ground rod either with a special toothed clamp or by welding. This is from a different table of sizes for grounding electrode conductors as opposed to ground wires from main panel to subpanel grounding conductors.

Its top may be visible or it may be sunk a few inches beneath the ground. The ground wire is connected to the ground terminal in the center of the meter which is bonded to the neutral bus bar. 6 wire under the ground lug and tighten it securely. I ve read this related question to determine i should use 6 awg wire but i m unsure of how to exactly connect the wire to my gas pipe where it enters my home.

2003 irc e3508 1 1 4 grounding clamps. Along with the hot and neutral wires the system includes a separate grounding wire that leads from the meter box to a grounding rod buried in the earth. Continuity of the grounding path to interior piping shall not rely on water meters filters or similar equipment. National electrical code nec 2014 edition table 250 122.

The required ground wire size is probably 6 awg see here even though power is supplied by 4 0. The purpose of the ground is not to reroute full power delivery to ground but to eliminate the potential between ground and incorrectly energized appliance casings etc. This is based on nec nfpa 70. For 200 amp service use a 4 gauge copper wire from the panel to the water pipe within 5 feet of where it enters the house and also between where it enters and the meter.

2017 nec bonding requirement 250 104 b. 2003 irc e3508 1 1 3 interior metal water piping shall be bonded to the service equipment enclosure or the grounded conductor at the service or the grounding electrode when of sufficient size. Place one end of the no. Strip a half inch of insulation off the no.

Connect the ground wire. Recent building codes often call for two or more ground rods for added security. 6 wire through the proper hole in the bottom of the meter base.