So when you do this calculation for wire size, do you size for the inrush, or normal run current. If this inrush is instantaneous can the normal run wire size handle this current for a brief moment?
Oh this is a slippery slope! I'll give my standard answer to avoid debating the NEC with the entire internet. Check with the AHJ (authority having jurisdiction). I've had my run ins with AHJs some resolved to my satisfaction after I've given my evidence ... and some not!
.577 is 1 / sqrt(3) The real question is "Where does sqrt(3) come from?" This lecture details the origin of the difference between line to line and line to neutral voltages: ruclips.net/video/RToXdTYQteo/видео.htmlsi=NVguRWC19kbDY8T3
This will be helpful for us users of 12VDC to 120VAC Inverters and power tools. I'll have to watch it more than once & take notes. Thank you.
True dat. Often times generators and inverters specify a "surge" capacity they're capable of meeting provided the demand is momentary in nature.
Thanks,very constructive.
So when you do this calculation for wire size, do you size for the inrush, or normal run current. If this inrush is instantaneous can the normal run wire size handle this current for a brief moment?
Oh this is a slippery slope! I'll give my standard answer to avoid debating the NEC with the entire internet. Check with the AHJ (authority having jurisdiction). I've had my run ins with AHJs some resolved to my satisfaction after I've given my evidence ... and some not!
Where does .577 come from?
.577 is 1 / sqrt(3) The real question is "Where does sqrt(3) come from?" This lecture details the origin of the difference between line to line and line to neutral voltages: ruclips.net/video/RToXdTYQteo/видео.htmlsi=NVguRWC19kbDY8T3
But if the moror is rated for 85 amps and at startig time it pulls 250 amps, how can my 100 amps fuses handle it without blowing?
Most likely this is a “slow blow” fuse which will temporarily allow an overload but melt if sustained.
Fly By Night?
You saw what I did there.