OMG! This guy is a MORON!
Seriously, I would look for another place to work. I would NOT work under someone with such lacking morals and judgment.

He is a complete fool. Especially for coming right out and telling you he knows it is a violation yet is fine doing it this way. And then to say the inspector will never see it....
What an ass.

Well what will it do? The circuit is still wired with the correct size wire and breaker. Is this something I should be beating to death or is it going to be a dangerous situation. Our area for a while was allowing people to take an exam and pass to get a master license with no experience besides passing the exam. He has never done a commercial job until this one. They now have gone back to 2 year aprentice. What is actually needed for this connection? Do the receptacles and plugs really cost hundreds of dollars? He does always want to do the job right its just he slips on codes and usually I catch them and he does it correctly. Just this one he feels that the blade of a 50 amp receptacle will not be harmed by 60 amps. But it is also an issue that it is a 120/240 receptacle not a 3 phase receptacle. What is the inspector going to say? He is a great inspector too.

not hundreds, it would likely be less than 150 for one plug AND receptacle
Outlet
Plug

If the fryer pulls above 50 amps the receptacle could overheat and fail. Maybe not immediately, but it will have a shortened life.
This is the kind of twit the insurance adjusters are looking for after a fire.
Hope his insurance is good.

This is one of the rare instances when an insurance company might not pay.
This is a flagrant violation of the code. It borders on intentional damage.
He knows it is wrong. He knows it could fail dangerously. Yet he still chooses to willingly violate code.

I'm sorry you got put in this situation. You have to make sure the inspector finds the problem.

Hopefully I'll talk him into doing it right before the inspector even comes. He just wants to know why it is a problem which I didn't know how to explain besides the receptacle is designed for 120/240 and not 3 phase, plus it exceeds the amperage rating. He then said, "I bet these pins could carry 200 amps if they had to" Kind of has that bad attitude of "Well it's not code but it is still safe right?" He thought bootleging a ground on a receptacle was a safe solution which I explained the dangers and now he realizes the dangers of his actions and says he won't do it again. Maybe this is why our 2 states got rid of the experior exam and brought back the apprenticeship. Some people don't get that the code is there as a bare minimum for safety and not just a suggestion of what works best. I really think he has no intentions to do things dangerously, wants to be a great company. However skipping codes is infact dangerous. But think the electrical education is not completely there and it is silly that I the 19 year old college student am the one telling them what to do often. They should be the ones kicking my butt telling me what to do :) They call me "book wiz" cause of all the code citations I enforce on the job lol. This is also the 1st commercial job he has had besides service calls. We got 4 men putting in a 800 amp service, outdoor light poles, and an entire fast food restaurant's worth of wiring. I've been working 8 am to 9 pm very often :)

The 3 phase issue is not nearly as important as the amperage.
As long as the number of contacts and voltage rating are within the circuit limits, there is not really an issue unless other equipment in the same occupancy could be connected and cause a prolem.
The rule is that plugs and receptacles in a single occupancy must not allow a connection that could cause damage.
In a number of cases I have used twist lock plugs for 400 Hz power. All other receptacles are conventional type, and the 400 Hz receptalces are clearly labeled and not compatable.
Exceeding the curent rating of any device is an invitation to problems.
Stay away from this guy. He is a danger.

personally i would call the inspector anonymously and suggest he pull the fryers out and check the outlets.

The size of the prongs on the plugs is not the issue. The receptacle has tension on the "wipers" which contact the plug prongs. Greater amperage creates more heat which ruins the tension on the "wipers" and causes a poor connection which causes more heat-etc.- a malignant progression. Life on overloaded plugs and receptacles will be short and fires from the resulting heat are possible.

Bus, that's what I was beginning to think today. Today he argues that the fryers only pull 60 at peak and said 20 the majority of the time which I doubt, probably more like 60 peak and 45 rms. The original prints specified 70 amp three phase fryers, so he should of planned on spending some bucks on the receptacles just like the shunt trip GE breakers we're using for the Ansul system. The actual fryers have a 60 amp internal fuse. He speaks really open of his opinionsabout this, today laughing with the general contractor who is in charge of everything about how he doesn't want to buy the 3 phase receptacles. It sounds for sure this is a dangerous situation.