B bigmac#1 New member Oct 1, 2008 #1 are you allowed to put 4 #500 THHN AN 1#1 THHN IN A 3INCH RIGID OR DOES NOTE 7 CHAP 9 SURPASS THE ALLOWABLE FILL ?
are you allowed to put 4 #500 THHN AN 1#1 THHN IN A 3INCH RIGID OR DOES NOTE 7 CHAP 9 SURPASS THE ALLOWABLE FILL ?
T Tuffy99 Member Oct 2, 2008 #2 Note 7 Chapter 9 refers to conductors ALL of the same size. If you calculate the square inches, however, you still are under 3.000 square inches. 4-500 & 1-#1 (all THHN) total 2.9854
Note 7 Chapter 9 refers to conductors ALL of the same size. If you calculate the square inches, however, you still are under 3.000 square inches. 4-500 & 1-#1 (all THHN) total 2.9854
B bkludecke Senior Member Location Big Bear Lake, CA Occupation Retired Electrical Contractor Oct 2, 2008 #4 This site is handy. http://www.electrician2.com/calculators/wireocpd_ver_1.html Go to the "24 free calculators" part and click on the conduit fill one. It walks you through the whole process and does the math.
This site is handy. http://www.electrician2.com/calculators/wireocpd_ver_1.html Go to the "24 free calculators" part and click on the conduit fill one. It walks you through the whole process and does the math.
