Recent content by luckyboy886

Passed - Elec Power - Delaware. Thanks to this board for the great references and discussion on various topics!

I think you are correct to assume that there are two loads for Phases A and C. The problem statement seems to be unclear. If there is only one phase between Phases A and C, there will be no flow in the neutral.

Spin-up, A question on Week 2 problem: The 3-phase motor is fed from the 3-phase 4600V (phase-to-phase) generator via a 10:1 delta-wye transformer. On primary side, the phase-to-phase voltage is 4600V --> on secondary side, the phase-to-neutral voltage is 460V. Should the motor voltage...

Sorry. the face emtions were converted automatically. They should be read ( b ).

Per NEC Section 220.61, the feeder or service neutral load shall be the maximum unbalance of the load between the neutral conductor and any one ungrounded conductor. When I reviewed examples D1(a)/(B), D2(a)/(B) in Annex D, I was confused which appliance loads should be included on the neutral...

SC57, You made a point here. It seems that after sizing the wire (to satisfy the VD requirement) according to the formula CM = 1.732 x K x I x D / VD, we still need to check the allowable current for the selected wire. In this example, we could use #8 wire (according to the given formula)...

SC57, I agree with you #2 wire should be used based on 125% x load current. I also noticed that the #2 wire will give me less than 3% voltage drop. However, this is not the purpose of my post. I couldn't understand why the formula CM = 1.732 x K x I x D / VD doesn't lead me to the right size...

Hi guys, I came across the followng problem associated with the voltage drop and the circular mils calculation. Can anyone give me some help? Thank you. Question: What is the Circular Mils (CM) rating for the branch-circuit in illustration below? (picture link...

I would like the Kaiser sample exam and solutions also...... [email protected] Thanks.