Cross-Sectional Area

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C

CAElectrician

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Is the cross-sectional area of a gutter or wireway the entire area inside? For example a 4"x4"x6' gutter the area would be 1152". Or is it the little area where the wires have the ability to cross? For instance if you took a 4"x4"x6' gutter the cross-sectionally area would be 4"x4"x1" so the cross-sectional area would be 16" and I would find the 20% of that????:confused:
 
That is how I was always taught, but I have never had the definition of cross-sectional area before. I posted this on another web page and they came up with the opposite answer.
Thanks
 
CAElectrician said:
That is how I was always taught, but I have never had the definition of cross-sectional area before. I posted this on another web page and they came up with the opposite answer.
Thanks
Click to expand...

Cross section: a surface or shape exposed by making a straight cut through something at right angles to the axis.

In this case the axis is length.
 
CAElectrician said:
For example a 4"x4"x6' gutter the area would be 1152".
Click to expand...
No, that would define the volume of the gutter in cubic inches, not the area.
For instance if you took a 4"x4"x6' gutter the cross-sectionally area would be 4"x4"x1" so the cross-sectional area would be 16" and I would find the 20% of that????:confused:
Click to expand...
That's correct, the cross-section area in square inches; you don't even need the 1" unit.

Area is two-dimensional; volume is three-dimensional.
 
chris kennedy said:
Take it easy on those boys Celtic. On second thought, I think this is going to be good. Mind if I tag along?:grin:
Click to expand...
LOL

Now hold on thar par'ner ....this ain't no posse ...it's a fact finding mission ;)

[on]tinfoil helmet
 
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