![]() main breaker replacing the 150A., hence the panel conforms to its 125A rating. If the SE is at least AWG-2 Cu (AWG-1/0 Al) then a 125A. panel may be swapped for one rated at 150A. If the SE is at least AWG-1 Cu (AWG-2/0 Al) then a 150A. breaker the conductor will heat up and potentially create a fire before the breaker will ever trip. branch circuit breaker for a range that is cabled with AWG-10 previously protected with a 2-P 30A. 150 AMP MAIN BREAKER MBK150M 200 AMP MAIN BREAKER MBK200M 150-225 AMP MAIN LUG MLK225M N Desconecte el suministro de energa a este equipo antes de trabajar. I see the issue similar to a DYIer dropping in a 2-P 40A. ![]() The rules are the rules and we are here to enforce or make the client aware when we know that there is an issue. Yes, it is only a 20% increase of the UL rated max., but would you be comfortable with a 60% by dropping in a 200A. main breaker and that it is less expensive to buy an empty main breaker panel from any big box DYI retailer to strip the main breaker out rather than to order a more expensive replacement breaker. main breaker is typically a special order product compared to a 100A., 150A., 200A. My guess is that the main breaker was replaced since the panel had been installed. ![]() The busbars are only rated for a maximum of 125A., else the mfr would have rated the panel for something other than the 125A. I look at the problem from the code enforcement inspector mindset.īoth are “visibly” labeled and the main breaker is “overrated” for the manufacturer’s panel rating. If that 150 amp breaker has to be replaced, where are you going to source an old breaker? If you can’t source the breaker, I guess you’d have to replace the whole panel? Or can you get an electrician to write a letter with his license on the line that a 150 amp breaker is okay in a 125 amp panel and that you are unlikely to pull more than 125 amps of current anyway? I guess this is something you’d have to ask an electrician. It obviously hasn’t caught fire yet…but the inherent potential to overheat/catch fire is there no? The same is with this decades old murray panel. ![]() I mean sure if you never pull more than 15 amps or do so rarely on that circuit, the wire is not going to burn up and this could go on for decades. If we are talking about a 20 amp breaker wired with 14 AWG NM cable on a normal lighting/receptacle circuit, would you say, “Ah sorry, even though this circuit has a 20 amp breaker installed for it, it is only good for 15 amps” or would you say, “the oversized breaker is a potential fire hazard.”? What happens when the main breaker is sized larger than allowed? will you have adequate protection of the components of the panel? This means that when the main breaker is sized at 125 amps, the bus bars, lugs, and other components of the panel are adequately protected. However, the labeling on the panel indicates a maximum allowable main breaker size of 125 Amps. If the installed breaker is 100 amps and the maximum panel rating is 125 amps then you might get away with writing an addendum. No, I don’t think this is as simple as writing an addendum saying the panel capacity is written wrong in the report. ![]()
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