conductor calculations

[gunter78911]

what's the square mil area of a conductor that is 0.250" on all side's ?
is that multipyed by 4 ? 1000 x 0.7854 =
78.54% is the rato between square, and circular mils.

 

[Dennis Alwon]

Is this a square conductor? Area of a square is side squared. The perimeter is 4 times the side. I am confused.

 

[gunter78911]

I dont understand the question my self!

 

[gunter78911]

the question for my home work is.

The square mil area of a conductor that is 0.250" on all side's is_________ square mils.

A. 55,000
B. 62,500
C. 75,600
D. 80,200

 

[Smart $]

the question for my home work is.

The square mil area of a conductor that is 0.250" on all side's is_________ square mils.

A. 55,000
B. 62,500
C. 75,600
D. 80,200

As a homework question I can only guide you to the correct answer...

Hint: The square mil area is the cross-sectiona area in square inches times 1,000,000. (1in? = 1,000,000 mil?)

 

[gunter78911]

yes sir ,and thanks... the only thing i can thing of is a busbar for the dementions. 0.250 is 1/4'' i didn't know what the formula is. to add up.
1/4 x 1/4 =
250 x250 = 62500.

wait i think i just figured it out! ( i fell stupid)
thank you everyone

 

[gunter78911]

So....... square inches times 1,000,000. (1in? = 1,000,000 mil?) 500,000.00 being 500 kcmil, what about small conductors?
Is 60 mils is writen like 0.06"

 

[Smart $]

So....... square inches times 1,000,000. (1in? = 1,000,000 mil?) 500,000.00 being 500 kcmil, what about small conductors?
Is 60 mils is writen like 0.06"

Yes, the "k" in kcmil is short for "kilo-", meaning 1000x.

60 mil = 0.06"

AWG sizing is used for small conductors. You can find their cmil sizing values in Chapter 9, Table 8 of the NEC.

PS: Do not mistake cmil area for mil? area. 1 cmil is approximately 0.7854 mil?.