Proteccion Contra Rayos - Lightning Protection

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Grounded RC

This looks like a grounding cable - only some of the columns had these.

Are they really for grounding ? Why only a few ?

http://lh3.google.com/harry.r.carmichael/RzZKgbLXgkI/AAAAAAAAM8w/CS3nY1h5SS8/P1110592.JPG?imgmax=800

http://lh5.google.com/harry.r.carmichael/RzZKh7LXglI/AAAAAAAAM88/7ddr7w8BbAQ/P1110596.JPG?imgmax=800

http://lh4.google.com/harry.r.carmichael/RzZKjrLXgmI/AAAAAAAAM9I/8VFfsID3lT0/P1110598.JPG?imgmax=800

General site - 251 N State, Chicago - That is an electrical substation next door.

http://lh3.google.com/harry.r.carmichael/RzZKSbLXgjI/AAAAAAAAM8k/J8VcFhMkmIE/P1110587.JPG?imgmax=800



:)

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It's typically for lightning protection more than anything, though the electrical service must also be grounded to the building in places. This type of grounding is usually just attaching a ground wire to a column or a plumbing line.

Something like that big cable going to the rebar in the column or to the steel sheeted wall is likely part of a lightning protection system, which is a code requirement in the City for buildings of a certain size which I cannot specifically remember at this time. The connections will have to be made to a minimum number of points designed by the EE.



:)

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353 N Clark

Grounding in this building as well --- nowhere near a power station.

http://lh4.google.com/harry.r.carmichael/R098eaJbz3I/AAAAAAAAPLo/LSwikNFWtpM/P1140087.JPG?imgmax=800




:)

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501 N State, Chicago - Palomar

April 04
http://lh3.google.com/harry.r.carmichael/R_jNAJXSvBI/AAAAAAAAgtA/s5wzeihDpE0/P1290179.JPG.jpg?imgmax=800

http://lh6.google.com/harry.r.carmichael/R_jNB5XSvCI/AAAAAAAAgtM/MH1lnZzjuYQ/P1290181.JPG.jpg?imgmax=800



:)