![]() Web 200 amp wire = 200a × 100% / 80% = 250a ampacity that means that you can to use a wire that has an ampacity of 250a or higher in order to set up a 200 amp circuit. Service entrance reinforced (ser) style is one type. Web service amp 200 disconnect wiring wire diagram residential electric copper underground outside meter panel electrical base line inside ac phase 200 amp electrical.īy wiring digital. as that is how most are that I run into.What Wire For 200 Amp Service. The service itself is as you say probably 320 Cont. copper piping ) then it is required to be bonded…but only from one of the enclosures… between the both with only (1) going back to the meter is because the code demands the “Neutral” or “Grounded” conductor be together in that location based on the setup you are describing.Ĥ.) Now…bonding is a different issue than grounding, if there are metal water piping in the dwelling ( ie. Remember in the case of the GEC to a ground rod, lightning could careless if it is a 200A service or a 1000A service…makes no difference on that part.Ģ.) The 2/0CU to each panel is fine…would not fret on that.ģ.) Now…the reason you are getting cont. OK…Let me see if I can break this down for you since my PT this morning was cancelled.ġ.) If the 6 AWG is going to a ground rod then it is perfectly fine, if no other GE’s exist in this dwelling then the GEC to the man made electrode ( ground rod ) in 6 AWG would be fine. I would greatly appreciate the opinion of highly experienced electrical inspectors/ electricians… There is missing GFCI protection at several required places. There is no AFCI protection in this home. There was significant heat rise on this wire, See IR photos of panels. H: Thee left phase connection to right panel was never tightened. There was a 240 volt pool pump in panel (2 each 110 VAC breakers) with no common trip. But I feel both panels must meet the bonding and grounding requirement like they are individual panels… is that correct thinking.)Īdditional observations about the panel and electrical system at first inspection: My understanding is that essentially the panels are totally parallel it’s two separate 200 amp service entrance panels, not 400 amp, with probably a 320 amp total capacity between the two panels. (If there are any, they are concealed and are less then 10 AWG) I feel that both panels should be bonded to two separate points, Earth and UFER or a cold water pipe, and that the bonding wires must be 4AWG copper or larger. I did not observe any other connection to common points of ground for either panel (earth, UFER, or cold water pipes. I assume there is continuity between the panels because of the neutrals are connected together in the meter panel)į. (However, there is confirmed electrical continuity between left and right panel. The right panel does not have this connection back to the meter base. ![]() The left panel has a GEC wire of #4 AWG connected from that panel’s neutral/ground buss, which went back to the meter base panel (A). ![]() (Is this correct to use on a circuit feeding a 200 Amp main breaker?)Į. The feeder wires from the meter to both panels are THHN 2/0 Copper. Two (2) SEC panels are side by side, both with 200 amp main breakers.ĭ. The meter has a solid core ground wire to earth, 6AWG (I can’t determine the AWG of the electrical drop wires, as it’s locked in the sealed meter panel, but would a 6 AWG ground at a 320+amp meter panel be correct?)Ĭ. The meter is a 320 Amp rating (I think) See photoī. I am not very experienced with a two (parallel) main panel set up in regard to grounding and bonding.Ī. I just wanted to get some second opinions on this, as it is new construction and may turn into a litigation inspection… So I gotta be really careful to be factually correct.
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