[RIVETER]

I am on my way back to the hospital to spend the night with my father-in-law but thought that I'd stop and ask a question. Today, I was looking out of the fourth floor window and noticed that there were lightning rods...points about 10 feet apart all around the perimeter of the second floor; Also tied into the loop were all of the roof mount hood fan covers with a very large gage wire. It all was tied EVEN to the metal dome roof drains. Down the hall I looked out the window there and no grounding/bonding at all. I've never done a hospital. Why the difference? I have to leave now so I'll look in later.

 

[McClary’s Electrical]

That's lightning protection, not grounding

 

[Magnettica]

Is any part of the lightning protection system required to be attached to GEC?

 

[walkerj]

Is any part of the lightning protection system required to be attached to GEC?

Yes.
They usually check and document we have everything bonded also. Water, steel, sprinkler, etc.

 

[SteveBayshore]

Don't you need another certification besides an EC to install lightning protection systems?

 

[Cl906um]

There is a radius from higher levels that doesnt néed protection. Only if it is in 6' of the ground drop...

 

[Bbsound]

The area protected may be an addition that had protection.
The area without the protection may have recently had a new roof installed.

Many different reasons either way, but I don't know of it being required.

 

[JohnR]

I have seen it on older sections of hospitals, but not usually on the newer sections. Don't know why, it seems to be a lost art.

 

[RIVETER]

That's lightning protection, not grounding

Grounding Is all about lightning.

 

[RIVETER]

Is any part of the lightning protection system required to be attached to GEC?

I would say all of it.

 

[robnj772]

I am on my way back to the hospital to spend the night with my father-in-law but thought that I'd stop and ask a question. Today, I was looking out of the fourth floor window and noticed that there were lightning rods...points about 10 feet apart all around the perimeter of the second floor; Also tied into the loop were all of the roof mount hood fan covers with a very large gage wire. It all was tied EVEN to the metal dome roof drains. Down the hall I looked out the window there and no grounding/bonding at all. I've never done a hospital. Why the difference? I have to leave now so I'll look in later.

How many power savers did you try to talk them Into?

 

[Meadow]

I have seen it on older sections of hospitals, but not usually on the newer sections. Don't know why, it seems to be a lost art.

Don't lighting rods increase the risk of a lightning strike to start with?

 

[azgard]

Don't lighting rods increase the risk of a lightning strike to start with?

The point of a lightning rod is to divert the strike not eliminate them.

 

[Meadow]

The point of a lightning rod is to divert the strike not eliminate them.

I know, but hasn't it been proven lightning is more likely to hit a building with rods then without them?

 

[Cl906um]

I know, but hasn't it been proven lightning is more likely to hit a building with rods then without them?

The leaders are given a way to neutralize themselves instead of having a strike directly on the building. There are plenty of videos on this out there. I do agree that some is just theory though. Look up Thompson lightning. They claim to be the best"