Thread: Wire size
View Single Post
  #15   Report Post  
Posted to rec.woodworking
Chris Friesen Chris Friesen is offline
external usenet poster
 
Posts: 1,185
Default Wire size

On 05/05/2010 09:29 AM, wrote:
On May 5, 9:26 am, "Mike Marlow" wrote:
Keith Nuttle wrote:

Original Poster: The motor is a Sears 1 hp motor that came with the
10" table saw when it was purchased in 1969. It is a capacitor start
motor which for the first couple of microseconds draws a quite high
current.


Ok... and this means what? At least, to the discussion as it has progressed
at this point?


It means that the saw, when bogged down, may (or not) draw 6A. 14GA
is fine. Though I'd still go 12GA. ;-)


You forgot about power factor and efficiency.

A good rule of thumb for most "normal" induction motors is 10A per HP at
120V.

Higher quality motors can do better, of course, but a "premium
efficiency" 1HP Baldor motor that costs $500 is still rated at 8.6A.

Chris