How do I find amperage in parallel cicuits...Any plain and simple shortcuts. I'm a ne

[mikeyowens43]

I'm new and my name is Joe Owens from Detroit MI. Area. Any comment is helpful for my understanding !!

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[Dennis Alwon]

Welcome to the forum

An example

Parallel 1/0

Ampacity for 1/0 at 75C is 150-- parallel the 1/0 and you have 300 amps

 

[Coppersmith]

The amperage in parallel conductors should be the same (if properly installed). You can measure the amperage in each conductor individually to verify and just add them together. Use a clamp on amp meter. Make sure it is designed for the proper voltage.

 

[mikeyowens43]

Got it

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[Ingenieur]

Do you mean a current divided into 2 circuits of different resistance?
like a current divider?

say 10 A in the main
R1 = 10 ohm
R2 = 20 ohm

i in R1 = R2/(R1 + R2) x 10 A = 20/30 x 10 = 6.67 A
seems backwards using R2? The lower R sees more i so you need to use the higher R value so more i is apportioned

R2 current = 10 - 6.67 = 3.33 or = R1/(R1 + R2) x 10 A = 10/30 x 10 = 3.33