Question about Electrical Supplies
Manufacturer emailed me after phone call to tech support; they sent me the full schematics, service manual, and owners manual of a generator I'm looking at buying(used). They did this even after I told them that I wanted to make the 50A plug a true 50A plug instead of the labeled 40A they sold it as. It is a 2003 model genset if you look at northerntools site you can see a "modern version" BUT, it has a 50A breaker now... Item is a "Northstar" 8.5KW cont. 10KW surge 18HP B&S gas unit with a 50AMP 4 prog plus that only has a factory 40Amp breaker that *appears to be* inline for it as the "OEM sticker" on the plug that say's 120V/40A on the panel. HOWEVER, the first schematic shows that it doesn't appear to have a "40Amp" but has two 35Amp on each side of the plug's 4 prongs off the genset and then they are "Stepped down" for each successively smaller plug ins: 30A 220V; 30A/120V; 2 of the 20(or25)A 120 double plugins. The second schematic hints at(my assumption) the 4 prong plug is not actually breakered... I can offer up the pdf's *if necessary*. I just wish if there was a way to know if the size of wire from generator head to the breakers and then to the 4 prong "50A" plug is the right size to handle 50+amps without melting or IF it truly ius only able to handle"40A". AND if that's the case how can I findout the correct wire size? Then just get the genset and buy the wire and 50A breaker and upgrade the wires on the genset. After all it is truly OEM there is no **** electronics at all on this barely used unit. Too much info? sorry if so. Thanks in advance.
Isn't too much info, and I appreciate your taking the time to list it.
It is with all due respect, that I feel no direct solution can be offered to your query.
The liability issue of someone posting how to change a manufacturers rated capacity, of an electrical generator's safety device/s, cannot/should not, be addressed by experts in this forum.
You are asking how to exceed stated safety ratings, for breakers on a generator. The engineers that designed the generator, also took into account the rated safety load of the breakers.
It is my belief, that should you change any part of this system, you are liable for any occurrence thereafter.
Good or bad.
Exceeding a 40 Amp load on a 220 volt line, and the safety device is too large, could be Very bad!
I hope I haven't offended you in any way, nor do I wish to incur your wrath. I truly wish I could help you in this endeavor, but I feel my hands are tied.
Posted on Oct 04, 2009
Testimonial: "honesty IS the best policy. Bummer I can't "Wax philosophical" with you outside this realm like a Mentor I have in the Subaru-forums (shruggs) :>)"
The stated rating is covered by the manufactures 10% built in safety factor so even a 50 amp plug will work as the safety device will kick out if it goes over it's rated amperage by 10 %. Due to out put and the built in circuitry if you overload the 35 to 50 amp or the 40 amp to 50 amp it will not cause damage as the circuit breaker will kick off at it's rated amperage draw when at 100 percent plus 10 % of rated capacity it will not damage anything. so I don't see where your problem is but let me know if you need additional information on ohms and powers law to understand the problem.
Posted on Oct 06, 2009
Testimonial: "I still have the trusty physic's books from college... will try to refresh brain this weekend."
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Posted on Jan 02, 2017
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