use of extension cords in coal tunnel

[wiremonkey78]

The Maintenance mechanics want us to make up extension cords. With gang boxies with GFCI receptacles on them. So that they can plug more than one tool at a time. So they don't have to keep walking the 20 to 30 feet to plug in a different tool. I told them that I was real sure that the code stated that the cord from a tool had to be continous. By rules of the NEC. I have check with Cooper Crouse-Hinds. About just the type of multipal outlet set up. Their rep. told me just what I had thought to be true. He couldn't get a UL listing on a device like that.
Because it was against Art.501.14 and 502.10.
Because this was a Div. I area we were talking about.
I just wanted to make sure that I was correct. Looking for imput.

[petersonra]

I am not all that sure what you are telling them is so.

The NEC basically stops at the outlet.

There may be other rules that apply that are outside NEC scope.

Is this "coal tunnel" in a coal mine? If so, NEC is not the final answer. MSHA has their own set of rules.

[wiremonkey78]

I'm sorry for the vagness. I work at a power plant. I'm talking about the coal reclaim areas. Also the coal handling areas.