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How often do I need to support/wedge the 4- #2 THHN cables inside a 1 1/4" EMT riser I am running from the basement to the 10th floor. The total straight section of vertical run is ~120 feet.
 

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Perfect. Thanks. That is the one I was looking for.

Anybody know... If the chart says it must be supported at 100 feet, will I need one cable support at the pull box at the top floor and another support 100 feet below it? Or would one support at <= 100 feet from the basement be sufficient?
 

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Perfect. Thanks. That is the one I was looking for.

Anybody know... If the chart says it must be supported at 100 feet, will I need one cable support at the pull box at the top floor and another support 100 feet below it? Or would one support at <= 100 feet from the basement be sufficient?
Looks like you just need one,Look at the right hand side of the table for 1/0 copper.
 
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