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12-14-2008, 01:40 PM   #31
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Quote:
 Originally Posted by TazinCR If the neutral goes out doesn't he end up with nothing except 220 outlets with no neutral and no power on the 110v outlets. Where would the 220 to the outlets come from if the neutral breaks?

Use a pencil/paper and draw the circuit including a load and you will see.

If there is no 120 loads, there is no 240 path.

Last edited by 220/221; 12-14-2008 at 01:50 PM.

 12-14-2008, 02:39 PM #32 Member   Join Date: Jul 2008 Location: NW of D.C. Posts: 5,990 Rewards Points: 2,000 I can't post spreadsheets but here is one that is self explanatory that analyzes a resi. circuit. Ia, Ib are the currents circulated due to V1, V2, respectively They both go through Rn, the current through Rn being Ia - Ib. 120.0 ent V1, volts 120.0 ent V2, volts 0.1 ent Rn, ohms 40.0 ent R1, ohms 20.0 ent R2, ohms 20.1 calc'd A= Rn+R2= 40.1 calc'd B=R1+Rn= 4,824.0 calc'd Num1= V1*Rn+B*V2 806.0 calc'd Denom1= (A*B)-(Rn^2) 6.0 calc'd Ib= Num1/Denom1, amps 120.6 calc'd Num2= C*Rn + V1 40.1 calc'd Denom2= B 3.0 calc'd Ia= Num2/Denom2, amps 1,079.1 calc'd total power in, (V1*Ia) + (V2*Ib), watts 0.9 calc'd power dissipated in Rn, [(Ia-Ib)^2]*Rn, watts 361.8 calc'd power dissipated in R1, [Ia^2]*R1, watts 716.4 calc'd power dissipated in R2, [Ib^2]*R2, watts 1,079.1 calc'd total power dissipated, watts 0.3 calc'd voltage across Rn, volts 120.3 calc'd voltage across R1, volts 119.7 calc'd voltage across R2, volts 0.6 calc'd voltage difference, R1-R2, volts Last edited by Yoyizit; 12-14-2008 at 03:07 PM.
 12-14-2008, 04:49 PM #33 Whatamess   Join Date: Jun 2008 Location: Costa Rica Posts: 423 Rewards Points: 250 Thanks 220 got it. I was not thinking about a load just the outlet. __________________ I may go home hungry, but not tired and hungry.
12-14-2008, 05:53 PM   #34
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Quote:
 Originally Posted by Yoyizit I can't post spreadsheets but here is one that is self explanatory that analyzes a resi. circuit. Ia, Ib are the currents circulated due to V1, V2, respectively They both go through Rn, the current through Rn being Ia - Ib. 120.0 ent V1, volts 120.0 ent V2, volts 0.1 ent Rn, ohms 40.0 ent R1, ohms 20.0 ent R2, ohms 20.1 calc'd A= Rn+R2= 40.1 calc'd B=R1+Rn= 4,824.0 calc'd Num1= V1*Rn+B*V2 806.0 calc'd Denom1= (A*B)-(Rn^2) 6.0 calc'd Ib= Num1/Denom1, amps 120.6 calc'd Num2= C*Rn + V1 40.1 calc'd Denom2= B 3.0 calc'd Ia= Num2/Denom2, amps 1,079.1 calc'd total power in, (V1*Ia) + (V2*Ib), watts 0.9 calc'd power dissipated in Rn, [(Ia-Ib)^2]*Rn, watts 361.8 calc'd power dissipated in R1, [Ia^2]*R1, watts 716.4 calc'd power dissipated in R2, [Ib^2]*R2, watts 1,079.1 calc'd total power dissipated, watts 0.3 calc'd voltage across Rn, volts 120.3 calc'd voltage across R1, volts 119.7 calc'd voltage across R2, volts 0.6 calc'd voltage difference, R1-R2, volts
And I thought I was bored today

12-14-2008, 05:58 PM   #35
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Quote:
 Originally Posted by Silk And I thought I was bored today
Is God perfect?
Therefore, does He (or She) speak a perfect language?
Is mathematics a perfect language?
'Nuff said. . .

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