Wire size normally is determined by current in Amps, and tolerable voltage drop. Really does not matter the voltage. When discussing Power, than voltage comes into play.
Odd voltages, 117V was the rating of old Japanese electronics, back in the days when made in Japan meant the same thing as made in China does today.
If it is a true 5HP motor (which it sounds like it is since the FLA is around 20a), it needs #10 THWN in conduit or #8/2 NM-b per code. It will need to be hardwired if you cant find a plug and receptacle rated for 5HP (not many exist). if hardwired, breaker can be max 70a. a local disconnect is required if the breaker panel is not within sight of and more than 50' away from the compressor
and wire size for motor circuits is actually sized by the HP NOT the nameplate amps
NEC requires 35a rated wire for a 5hp motor so you need #10 THWN in conduit or #8/2 NM-b
You can't only mention 3 phase at this point.
Don't install the disconnect between the VFD and the compressor. Install it before the VFD
I am not so sure Tung-Sol, RCA, Sylvania, etc. would like their vacuum tubes of the era considered "Japanese Electronics". Some electronic designs of the era used line voltage filament tubes. All this family of tubes had a prefix of 117 such as 1117L7. Common radios of the day used the "all American Five tube line up, which had filaments of 12, 35, 50 VAC, etc. The idea was to string filaments in series to equal 117VAC, thus negating the need for a step down filament transformer. This of course was an era where US line voltage was 110VAC. The 117 gave a little margin to prevent blowing out tube filaments in high line voltage areas. Repair drawings typically showed 117VAC as the input voltage and designated trouble shooting voltages were based on 117VAC input.
ummm the 3phase totally changes things here. why wasnt this mentioned in the beginning? the wire size is gonna be different than normal
Yep, I did the math several years ago when I installed my 5hp, 240v, 3ph compressor. Running for years on 12ga THHN. About 50 feet of wire run.
True, because typically a dual voltage motor, 120/240 will draw half the current at 240, as opposed to 120. Voltage drop is a function of IxR, current times resistance, of the wire in this case. Electrical power will be the same in both cases, eg, a motor drawing 20 running Amps at 120 might also be wired to operate at 240 volts and draw 10 running Amps. Power is 2400 watts either way. Wiring needs to be based on current draw and of course as mentioned, motors are special case due to start up current.
It's not just motors, but anything electrical.
My question, would you buy a Yugo automobile? Huanyang VFD's have a horrible reputation, so bad that the Practical Machinist forum bans them from any discussion on that forum.I didn't realize it made all that much of a difference. The motor is rated to pull 14.2 amps at 230v 3PH, I was mistaken.
Plan to use this VFD: https://www.amazon.com/dp/B077KSN4C5/?tag=atomicindus08-20
I do not see the amp draw of the VFD by itself. Not sure what the typical amp draw is when converting from single phase to 3 phase. For clarification - this is in my residential detached garage with single phase service.
in post #23 above he said he has single phase power
Might shop around, buying the cheapest garbage may end up costing a whole lot more, when wanting VFD's for phase conversion, only ended up paying more then I wanted to because needed one with a NEMA type 4X enclosure & they are more expensive then a NEMA type 1, the others I stumbled on deals, they were discontinued GE/Fuji drives.