![]() Ground Wire Size Table Note: View wire size charts from the list below. This isn't a standard conductor size though, so we should use a 6AWG copper conductor (which has 13.30mm2 of area) or a 4AWG aluminum conductor for this ground wire. This table lists the minimum sizes of grounding conductors for grounding raceways and equipment. Multiplying that by the 8.367mm2 area of an 8AWG copper conductor gives us about 10.55mm2 for the resulting wire. However, many times we will ask about the amps exactly. If, however, you actually need 200A (e.g., you are running a lot of big tools at the same time or have an EV charging next to the shop or have a big electric on-demand water heater (not a good idea.)) then you may actually need 200A feed and associated big wire. Both of these copper and aluminum tables include AWG or kcmil (MCM) wires and AWG ground wire pair. that should be fixed immediately smaller and 4 copper for 200 amp services. For 200 amp service, you would need anything from 4 AWG copper ground wire to 0 AWG aluminum ground wires, as we will see further on. ![]() the 1AWG that is required to meet Code ampacity rules gives us a size ratio of 53.49mm2/42.41mm2 based on the NEC Chapter 9, Table 8 conductor sizes (we can do this math in mm2 since the conversion factors cancel out here) or about 1.26. In the image, since the feeder conductors to the gutter box are protected by a 200 amp circuit breaker, at least a 6 AWG copper equipment grounding. In most homes the grounding jumper wire side of the water meter using pipe. C3PO Senior Member Location Tennessee 2 Look at Section 250. There is a argument that you must use a 4 bare copper minimum to both ground rods for a 200 amp service. Size proportionately, according to the circular mil area of theįor instance, using 1/0 aluminum wire for the hots and neutral in your example vs. 1 Can someone show where it says in the NEC that you can use a 6 bare copper ground wire to both ground rods. Grounding conductors, where installed, shall be increased in Increased in size from the minimum size that has sufficientĪmpacity for the intended installation, wire-type equipment When you start upsizing wires for voltage drop control, the size of the ground wire is governed by NEC 250.122(B): The cable is made of 6 gauge wire and is 8 feet. If you are using a four-wire direct burial cable, then just use the ground wire in the cable as it will be quite amply sized for the job it is doing if you are using PVC conduit, then bare 8AWG copper would be my choice to keep conduit fill down.and then upsize from there based on how much upsizing of the other wires you do Replacement 200 amp ground cable with bolt on style with ground clamp for Eastwood MIG 135 and 175 Welders. 4/0 is only good for 200 amps in a residential usage. Is AL 4/0-4/0-4/0-4/0 with 2/0 bare ground SER wire from breaker to new panel OK. You are correct that for a 100A feeder, the associated ground wire needs to be an 8AWG copper or 6AWG aluminum wire. Electrical - AC & DC - What size wire and conduit do I need to feed a 200A, 3 phase 208Y/120V panel. ![]()
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