string height at 1st fret

[shoulderpet]

Hi

I have a bass that I suspect has the nut cut a little high, I searched but could not find anything, basically I am wondering what the action at the 1st fret should be, hoping someone can help, thanks

[danweb22]

Great video here that I used 

 

 

[LITTLEWING]

I always do this 3rd fret and tap thing. Dead easy, quick and absolutely bang on accurate.

[Paddy515]

20 thou under the 1st fret