Nathan (SD)
Member
I am working on a project. I have much 3/4 PVC and fittings conduit already in possession from a salvage job. I cannot interpret the rules about current ratings. I found charts for conduit fill. It says up to 15 current carrying conductors for 12 guage wire. I want to mix some 8 and 10 and 12 guage in some places. How do I determine how many amps the conduit can handle?
In my mind 14 seperate 12g ccc would be 7 circuits, each with a 20 amp breaker gives me 240 amps of load. 8 separate 10g ccc would be 4 circuits with a 30amp breaker is 120 amps of load. Is this the correct calculation or am I out in left field. The 240 amps seems way high for a 3/4 conduit?
In my mind 14 seperate 12g ccc would be 7 circuits, each with a 20 amp breaker gives me 240 amps of load. 8 separate 10g ccc would be 4 circuits with a 30amp breaker is 120 amps of load. Is this the correct calculation or am I out in left field. The 240 amps seems way high for a 3/4 conduit?