On Sun, 19 Oct 2014 18:57:44 -0500, Ignoramus9750
wrote:

On 2014-10-19, Lucky Dave wrote:
Have three phase 240 volt in my shop. Need to change plug to 240v single
phase


Hire an industrial electrician. The way you worded your question makes
me think that it would be the safest course of action.

i
+1 on that