What is the neutral current here?

[Electric-Light]

There are two space heaters in use downstream of apartment 1 meter. They're both perfectly linear resistive load and L1 to N and L2 to N are both 120.00v and each load draws exactly 10.00A.

Space heater one is connected beween L1 to N. Space heater two is connected between L2 to N. There is nothing else in use at the moment.

Each space heater draws equally and they're rated 10A 120v.

What is the neutral current from meter 1 to apartment 1?

Thanks to MikeHolt publication I just learned this today. :lol:

 

[iwire]

What is the supply system voltage?

 

[infinity]

What is the supply system voltage?

Guess that I should have asked that before voting.

 

[Electric-Light]

What is the supply system voltage?

It hasn't be checked

 

[roger]

There will also be more than one answer since the illustration is questioning the current in all three feeders.

Roger

 

[roger]

It hasn't be checked

Then with out knowing that the question as you asked it has a 50/50 chance of being correct with either 0 or 10 amps

Roger

 

[Electric-Light]

There will also be more than one answer since the illustration is questioning the current in all three feeders.

Roger

Illustration shows three feeders, but the question isn't about neutral current in main feeder feeding the meter panel. It's simply between meter 1 and apartment 1.

 

[iwire]

It hasn't be checked

Well then no one can answer the question.:happyno:

 

[yankj]

RTFQ

 

[roger]

Illustration shows three feeders, but the question isn't about neutral current in main feeder feeding the meter panel. It's simply between meter 1 and apartment 1.

But, you still need to tell us if you have a single winding source or a three phase wye.

Roger

 

[infinity]

Then with out knowing that the question as you asked it has a 50/50 chance of being correct with either 0 or 10 amps

Roger

That's just it. I glanced as the illustration and assumed 1?, 120/240. One shouldn't assume. :happyno:

 

[roger]

RTFQ

And what would your answer be if the supply is a wye?

Roger

 

[Electric-Light]

But, you still need to tell us if you have a single winding source or a three phase wye.

Roger

It's not needed to answer the poll question correctly though :happyno:

 

[don_resqcapt19]

It's not needed to answer the poll question correctly though :happyno:

Given the wording of the pole, that is a correct statement.

 

[infinity]

It's not needed to answer the poll question correctly though :happyno:

Really? Most of us disagree so what's the answer?

 

[roger]

Given the wording of the pole, that is a correct statement.

Thanks Don, that being the case the answer would be ....

Doh!

Roger

 

[infinity]

Given the wording of the pole, that is a correct statement.

Opps. You're right I didn't peruse the answers. :ashamed1:

 

[Electric-Light]

Really? Most of us disagree so what's the answer?

0A if 120/240 1ph CT

10A if 208/120 3w

So the correct answer is C. Could be either.

 

[Electric-Light]

240/120 from CT delta or single phase

IN= |A-B|
10-10 = 0A

208/120 3w
IN = sqrt(A^2+B^2 - A*B)

sqrt(100+100-100) = 10A

 

[iwire]

Was there a point to all this?