CA Traveler wrote:
Mike,
Yes correctly rated ATSs are available and as I recall the neutral is rated for 70A. The QD 8000 has a maximum of 66A on the neutral because it is NOT a 120/240V gen. The neutral amps for the 2 hots add for the gen.
Wiz has it right to check the current wiring for length, gauge etc. However it's unlikely that the OPs current gen has adequate wiring for the QD 8000. The larger neutral is needed from the gen to the ATS and then from the ATS to the CB panel. And the OPs hots from the gen to the ATS may also be undersized for the larger gen.
Mile High wrote:
CA Traveler wrote:
Lots of misinformation here. Split phase is used to identify 120/240V power. The QD 8000 is not 120/240V but rather 2 120V circuits. This means each hot line will carry 4000/120 = 33A and the neutral will carry the combined current of 66A. You may need to replace the wiring from the gen to the ATS and then to the CB panel. And you will need to upgrade the ATS to one that will handle the increased neutral amps.
There are no ATS upgrades for RVs. They already handle the full common neutral load from the pedestal split phase system, and the generator produces far less than that, even if it is not split phase. RV ATS are standard units designed for a 50A service or 30A service. The size of the generator has no impact on the ATS, or the size of wire to the CB, unless the generator is going to exceed the pedestal service. It doesn't help to unravel misinformation with more misinformation.
You aren't understanding -
The 50A ATS are all the same - they are not rated differently even by brand. The same 50A ATS is used for the 4,000 microlight as it is for the 12,000W diesels on an RV.
The wiring to the CB and ATS is sized for the shore line, not the generator. Everything from the shore line to the CB is sized for 50A service on both legs including neutral. The only wiring that will need upgraded is from the generator to the transfer switch to accommodate the higher output from the 8000 genset.
You are making way more out of this than it needs to be.
