![]() Last but not least, you'll want to use an inch-pound torque wrench and/or torque screwdriver to tighten the various connections to their specified/labeled tightening torques. Note that if your shed panel doesn't come with grounding bars, you'll need to fit the appropriate grounding bars yourself in addition to using them to land your grounding wires and pulling the green bonding screw out of the panel. Scenario: 200-amp, 120/240-volt, single-phase, 3-wire electrical service with Type THWN copper service entrance conductors installed in Schedule 40 PVC conduit and a copper grounding electrode conductor and copper bonding wires. A 6AWG copper grounding electrode conductor will suffice for connecting them to the shed panel's grounding bar. Next, attach the ground wire to the grounding bar and connect the neutral wires to the neutral bar. First, locate the main utility lines, which should be connected to the main disconnect switch. The good news is that you are correct that you'll need two grounding rods at the shed. The wiring of a 200 amp service panel is relatively straightforward, but must be done carefully and with precision. 12/2 with ground Romex brand SIMpull residential indoor electricial wire. Furthermore, while you can direct bury MHF, I'd run it in a 2" PVC conduit instead this way, if you decide to go up to a full 200A, you can repull the wires instead of having to dig everything back up to replace it. Southwire Underground Distribution Cable 2/0 Ga, 3 Conductor 200 Amp 600 V 90. Given that you aren't going to be pushing a full 200A over the cable (which'd require 250kcmil Al, since the 83% reduction in 310.15(B)(7) doesn't apply to your situation), but need a 4-wire cable as your shed is getting powered by a feeder from your service disconnect at the pole, I'd use a 4/0-4/0-2/0-4 aluminum Mobile Home Feeder cable for this job. These are not legal for grounding the home electrical service, and they can cause your grounding system to fail when it is needed most.I'd use a 4/0-4/0-2/0-4 Mobile Home Feeder cable for this job Yes, you can run the ground to the cold water piping if it is definitely steel/copper pipe and extends outdoors in the ground. It is unwise and unsafe to install the shorter, 4-foot ground rods often sold for grounding things like TV antennas and other individual devices. Usually, the area close to the foundation has enough moisture due to runoff water from downspouts. 4/0 or 250 kcmil wire requires a 2 aluminum ground. We are looking at running the wire in conduit. When you bump the conductors you must bump the ground too in proportion, to 1 Al. We are looking to run underground power for 200 amp service to our new shop that is about 250 away using aluminum wire. Given that you arent going to be pushing a full 200A over the cable (whichd require 250kcmil Al, since the 83 reduction in 310. However, it can change depending on the place you live. If you want to use aluminum or copper-clad aluminum it is 2 AWG. If you are going to be pushing the limits of the 200A service, going up a size to 300 kcmil will take care of voltage drop (2.88 160A). For a 200 amp service, the ground wire is 4 AWG if the wire is copper. Whenever possible, ground rods should go into moist soil around your home. 4/0 or 250 kcmil wire requires a 2 aluminum ground. Some counties also allow or require a footing or foundation ground connection for new construction. Note: Most local jurisdictions and local power companies require the 2-ground rod method to pass inspection. If you are running an underground 200 amp service, then you may be wondering what size wire to use in your installation. ![]() Whether it be copper, copper-clad, or aluminum, let’s take a look at what size wire you need for 200 amp service. This is usually a better option, but the rods must be at least six feet apart, according to the NEC. The wire that you use for 200 amp service depends on the material, and you’ll need 4/0 wire if it is aluminum. In very dry ground, which provides more resistance than moist soil (meaning it does not accept electricity as readily), ground rods are sometimes stacked and joined with a special clamp so they can extend deeper into the earth.Īnother option is to add a second ground rod. As a rule, ground rods must be a minimum of eight feet long and should not be cut down. Ground rods come in both 8-foot and 10-foot lengths, with 8-foot being the most common size used in residential installations. The grounding rod that connects the home grounding system into the earth is a long metal rod, usually copper bonded to steel, galvanized iron, or stainless steel. The Spruce Home Improvement Review Board.
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