We have one piece of equipment that has a lead attached to it with 2 kind of "boxes" attached. I am told that these are to prevent a "power surge" to the kit...what does this mean?
... I'm trying to imagine what piece of equipment that is (no doubt the
Mole would know)! Diagnostic ultrasound? Theatre "video stack"?
Any more clues?

PS: I believe I know John's secret ... but I'm don't think I should tell.