A: No, this cap is not electrically rated.
A: I have been using the bump caps for the last five years. I use it personally and all of my staff use them. I am a big fan of the product and I recommend them often. They help us in two ways. The bump hats limit lacerations of our skin when working very close to sharp edges, sheet metal, and tips of screws or nails. It is evident by the small tares in the material on our caps. The second way they help is limiting blunt trauma. We work in a lot of confined or low clearance spaces in and around pipes, beams, and duct work. When we do have a collision the bump cap spreads the impact around and lessons greatly the force of the blow. I think you are correct in that this product may be a benefit to you especially if you are falling forward or backward and are at risk of striking something on the way down. It won't stop all of the force of the collision but it will reduce it. However this is only an insert and will only be effective if the hat you choose is capable of remaining on your head through the fall. It is not as effective as a helmet would be and has no chin strap to ensure that it stays in place.
A: The bump cap insert was 5.67 us
A: The dimensions are: Helmet depth (in.) 8 Helmet height (in.) 4.25
A: As per the description, it does not meet ANSI/ISEA Z89.1 requirements, meaning that it is meant for low impact areas not requiring a hard hat. In most cases, this means that it is not impact tested or rated. If you work in an area requiring some sort of head protection, I would recommend getting an actual hard hat. This is meant more for tight spaces where you might bump your head against a wall or beam, and will not protect against falling equipment, or a blow from running machinery.