Recent content by MarkT

On self excited DC motors/generators that lose their residual magnitism. You can use a technique called 'Flashing the field' aka, applying a DC voltage to the field and it should come up. If it builds up in the wrong direction then it can be reversed. This should be done with all other...

This is the thing with sizing motors. because reactive power the current is still higher than it would be with an Fp of 1. So the conductors must be sized bigger in order to accommodate this. If the conductors are size just for the nameplate of the motor , there will/can be an excessive...

Pack rat2 How would you be in paralle with the toaster, the circuitry of the toaster is confined to the toaster. Depending on the resistance/impedance of the water and would determine how much current would flow between the hot and neutral. Current will always try to get back to the source...

Nixie tubes were generally used for counters. One nice thing about tube circuits you always knew when there was a problem, especially on motor drives, maximum smoke and flame. The circuits were built on huge slate boards, to keep the curcuits stable. And if there was a bad circuit the whole...

[B]Warren: Ok, if you are not talking 'unplugging resistive devices' then how about this, Given: 25kw load at unity Fp. @240 volts Line-line total current is 104.2 Amps. Using the Inductance theory we will add 25Kvar of inductance to the house. this comes out to be 37.36Kva@45degrees. I...

from: Warren;This is false; you would be changing your power factor from its normal state, nearly all resistive, to being much more reactive. You would have less real (metered) current flowing. We are talking residential, the question was to save money on his electric bill. Most residences...

Just a note here on Circuit Breakers a 15A breaker will not trip at 15 amps. There is a time curve involved the better the path back to the panel the faster the breaker will trip. The bathtub example if there is no direct path, FaultPath back to the breaker it may not trip. Typically to get a...

Regardless whether the meter is inserted correctly or not by adding inductors there will be some true power this would be added to the existing load and would add up the cost of your bill. Years ago a meter could be inserted upside down and would run backwards however most power companies...

Mikenol Where is the sub-panel near the new work? First: when running a sub-panel you must run a 4-conductor cable, from the main panel to the sub, and the Neutral at the sub must be Isolated from ground, i.e., the neutral should be white and the grounding conductor can be bare but the...