Omhs triangle. (College question)

[Floody]

Ok so in college last night I was given some papers that I missed on having just before Xmas due to being away. It's to do with the ohms triangle. I've nailed the maths side of it and I understand it perfectly well.

Theres questions in here, work out the voltage, work out the resistance, work out the current. Can do those without fail

until I came to this question which thrown me a bit... Now, I think it's just the way the question is worded that throws you, but ill show.

the question: The insulation resistance measured between line conductors on a 400v supply was found to be 2Mohms (2 mega ohms, 2million). Calculate the leakage current.

So my answer is: 0.2 x 10^-4amps. Or 0.0002amps

How I worked it out: the ohms law triangle says to find I, we need to divide V by R, so 400v / 2,000,000 ohms = 0.0002amps


is that right or wrong?

the only reason why I ask is because it says 'leakage current' and not 'current'

Thanks guys

 

[Marvo]

Your method is correct.

Their terminology is correct. They call it leakage current because is current that's flowing due to the insulation value between 2 phases (line conductors) rather than a load current that is doing useful work. If it was a current that was flowing to earth it would be designated as earth leakage current but it isn't so it's just called leakage.

 

[Floody]

Ahh excellent, cheers Marvo.

Like I said, just the way the question was worded threw me off a bit