Does x-ray machine in hospital require a redundant ground?

[Cartoon1]

I have an X-ray machine that has 80amp fla. It also requires the the ground to be sized the same as the hot wires. Requires 3 hot wires and no netrual. 3 phase 480v.

I'm providing a 100A breaker with 3#2 and 1#2 green ground. All copper.

My question is does the X-ray require a redundant ground cable? And if so, what size?

Thank you

 

[LarryFine]

I'm not sure, but I would think the EGC in a metallic conduit would qualify.

 

[roger]

I have an X-ray machine that has 80amp fla. It also requires the the ground to be sized the same as the hot wires. Requires 3 hot wires and no netrual. 3 phase 480v.

I'm providing a 100A breaker with 3#2 and 1#2 green ground. All copper.

My question is does the X-ray require a redundant ground cable? And if so, what size?

Thank you

As Larry says, it's there by default and the #2 is it. I assume your designing per the manufacturers plans and many times the equipment and room is listed as a unit.

 

[roger]

BTW, medical equipment designers are not the sharpest marbles in the bag.

 

[Cartoon1]

As Larry says, it's there by default and the #2 is it. I assume your designing per the manufacturers plans and many times the equipment and room is listed as a unit.

Yes per manufacturer requirement.

 

[Cartoon1]

BTW, medical equipment designers are not the sharpest marbles in the bag.

Sometimes it is very hard to get information on medical equipment. For example in this case i would of sized the ground per NEC table, till i got information that the ground had to be sized the same as the hot wires.

 

[roger]

I will post about a medical equipment manufacturers stupidity later, I'm heading out the door right now but it was due to an unneeded Neutral conductor.