Recently had the electric panel upgraded and also relocated. The electrician confirmed me the key wires comes from the street (in come the meter) and also indicated they were 1/0 aluminum. The breaker panel had a 125 A key breaker, and he put in a 150 A main breaker on the new panel (the brand-new panel is a 200 A panel). He changed the wires indigenous the meter to the panel with brand-new copper (forget the gauge). Native what I"ve seen approximately here on mmsanotherstage2019.com.SE, though, 1/0 Al is adequate for just 125 A, no 150. Need to I be worried?

I"m in the Houston, Texas subway area.

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We never ever tripped the 125 A breaker, yet did include a 50 A 240 V receptacle because that EV charging. No EV yet, and also its breaker is off, for this reason we"re not illustration any an ext current 보다 we offered to. I"m not really worried around an immediate problem, only as soon as we gain the EV.


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Main wires coming from the street room engineered to administer adequate power by the utility company. They carry out not need to follow the very same wire sizing gauge as specified in the NEC since the NEC does not govern energy companies.

The recommendations noted on this site are generally taken native NEC tables i m sorry does apply to work-related performed on most residential and commercial spaces in the unified States.

Assuming that your locality approved your panel upgrade per all required permits and also contacts and the utility company was notified and involved to eliminate power, that should it is in fine. However, if you have actually concerns around the energy company"s involvement/approval in the update process, friend should contact the utility company.


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It counts on as soon as the work was done, and which variation of the code was being followed. In the 2011 code and before, there to be Table 310.15(B)(7). This table listed the service and also feeder conductor dimension for 120/240 volts, 3-Wire, Single-Phase dwelling Services. The table noted 1/0 AL come be provided for 125 ampere services.

The 2014 variation of the code omitted this table, since folks were simply using the values, and also not applying correction and/or adjustment components properly. The 2014 version enabled you to dimension the conductors come 83% of the business rating, which usually settled to around the exact same as the old table.

Looking at her 150 ampere business as an example (Excluding any kind of temperature or various other adjustments).

150 ampere x 0.83 = 124.5

Table 310.15(B)(16) states that 1 AWG copper is great for 130 amperes at 75C. So if no adjustments were needed, 1 AWG would certainly be allowed as organization conductors for a 120/240 volts, 3-Wire, single-phase apartment service.


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Depends ~ above the setup. If the power agency furnished the company to the meter pan, it does not autumn under the NEC. The meter pan should have a minimum #1 copper wire to the key breaker. If so, climate you"re all good.


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