..yes,
We did a test yesterday and if you turn two 6.6 vacs and a 800 psi pump on simultaneously you can get a spike of around 25 amps. I generally use remote plugs on each lead splitting this load over two stages, however if something else is running on the system drawing 6 -7 amps somewhere, by just turning on one vac and one motor you can get a trip out occasionally. This is where a soft start seems a great idea.