- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
500 MCM has 1/2 the cir. mil of 1000 MCM. So if I parallel 2- 500 MCM cables I should have the same area as one 1000MCM cable.
Chapter 9 Table 8 verifies this fact -- 500 MCM has an area of .519 sq. in multiply by 2 and you get 1.038 sq. inches. Now 1000 MCM has an area of 1.042 sq. inches. Pretty close anyway-- not sure why they are different,
but that's not my question.
500 MCM is rated for 380 amps at 75 C. I always assumed if I parallel the 500 MCM cables then it would be good for 760 amps---(Forget the derating issues.) or is it only good for 545 amps (same as 10000 MCM at 75 C)?
If it is good for 760-- why the difference?
Chapter 9 Table 8 verifies this fact -- 500 MCM has an area of .519 sq. in multiply by 2 and you get 1.038 sq. inches. Now 1000 MCM has an area of 1.042 sq. inches. Pretty close anyway-- not sure why they are different,
but that's not my question.
500 MCM is rated for 380 amps at 75 C. I always assumed if I parallel the 500 MCM cables then it would be good for 760 amps---(Forget the derating issues.) or is it only good for 545 amps (same as 10000 MCM at 75 C)?
If it is good for 760-- why the difference?