6/2 NM and 5kw heat

[electriclese]

So we don't know the load to determine wire size? Does the mfg spec MOP to match wire size or no because they can add more 5k heating elements? Even so, that still changes EG size if you up sized from 10 to 6

We use load to size OCPD and wire size is done according to OCPD and distance due to voltage drop. No requirement to oversize for future although not a bad idea.

MOP is to account for inrush startup current. Compared to FLA rating.

 

[electriclese]

Use table 250.122 for sizing equipment grounding conductors, what you might be getting mixed up with is 250.122(B) requires us that any time we increase wire size in ungrounded conductors for voltage drop we have to increase the EGC in size proportionately according to the circular mil area of the ungrounded conductors, this many times will leave us with the same size EGC as the ungrounded.

 

[gfretwell]

This is certainly the unintended consequence of poorly worded code language.