The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm≤ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 7
Trumpy 6
Who's Online
0 registered (), 132 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#25183 - 04/30/03 10:34 AM Air terminals
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
What are air terminals as they relate to lightning protection? I've never worked with air terminals or even seen them before.

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#25184 - 04/30/03 11:41 AM Re: Air terminals
Ron Offline
Member

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
An air terminal is the rod that stands on top of the roof/parapet/equipment/etc.
You might know it as a lightning rod.

See NFPA 780
In a NFPA compliant system you will find many of these at the roof/etc.

[This message has been edited by Ron (edited 04-30-2003).]
_________________________
Ron

Top
#25185 - 04/30/03 01:27 PM Re: Air terminals
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Air terminals are the little pokey things that point upwards.

   

http://www.harger.com/catalog2002/2_2_1.pdf



[This message has been edited by Bjarney (edited 04-30-2003).]

Top
#25186 - 04/30/03 01:30 PM Re: Air terminals
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
Thank you Ron.

Top
#25187 - 04/30/03 11:41 PM Re: Air terminals
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Bjarney,
Thats a pretty "graphic" warning sign you've got there, I can just feel the pain, looking at the sign!.

[This message has been edited by Trumpy (edited 05-01-2003).]
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

Top
#25188 - 05/01/03 08:21 AM Re: Air terminals
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
Bjarney-

Thank you for graphic and text.

Top
#25189 - 05/01/03 10:24 AM Re: Air terminals
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
There new air terminals available that have a "mushroom" type head to eliminate the impalement hazard. I didn't see them in the catalog that BJ linked to, but I know that that company has them because the first time I saw them was at their booth at a trade show.
Don
_________________________
Don(resqcapt19)

Top
#25190 - 05/01/03 12:34 PM Re: Air terminals
Ron Offline
Member

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
Don,
How about this one? http://www.harger.com/catalog2002/2_2_5.pdf
This is the one I currently spec.
_________________________
Ron

Top
#25191 - 05/01/03 12:54 PM Re: Air terminals
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
Ron,
The one I was thinking about was a mushroom shape, but that one will also prevent the problem.
Don
_________________________
Don(resqcapt19)

Top
#25192 - 05/01/03 02:55 PM Re: Air terminals
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: New York City
I thought the reason a lighting rod comes to a point is becaue it seems to "attract" the lightning bolt better?

If this is true (I don't know), wouldn't this make a blunted rod less effective?

If it doesn't matter....why make the tips so sharp?

Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals