I have a piece of electrical equipment at a voltage potential of 277VAC to ground. Due to hardware problems I have an air gap of 3/8 from ground to 277VAC when it used to be one inch. Please advise if I am safe to leave it that way or should I add insulation.
That is ok with respect to any possible arc. But there may be other reasons to add insulation. Safety for example. If it's easy to add the insulation, do it. .
