Dspark,
Your 237 loops will be effected by ground fault current flowing through the conduit. Not that it will cancel out the total XL of the loops, but it will have some ability to reduce a field. This would be in the realm of how a Shaded Pole motor works. That consept is the reason that split phase motors can start on 1 phase AC - the "Auxillary Winding" reduces the stationary magnetic field produced by 1 phase AC on the "Run Winding", which allows the Rotor to have current Induced into it [and begin to rotate].
Back to the Q;
There's also factors on which direction the magnetic fields cross at - simply meaning is the coiled wire wound "In Step" [in 0/180 polarity], or "Out Of Step" [at 90° angles].
In step would exibit an influence on the inductor, whereas out of step will have very little effect between the two flows.
This is a topic of Breadboarding, when 2 or more Inductors are mounted on the same PCB and in close proximity. Placing them at right angles is done to reduce the amount of inductive coupling [that's why Toroids are SOOOOOO much nicer to use than normal stacked coils - the Toroids contain their fields almost entirely within themselves].
A few last things would be the diameter of the coil, permeability of the core [it's magnetic reluctance], layer depth [distance between each layer and row of coiled wire], trueness, or consistity, of the windings [AKA Perfect Layer] and finally the integrety of the coil [limited "Bouncing" between layers when currents peak or cross zero].
These factors will be used to determine the Inductance of the coil [rated in mH - milli Henrys]. Apply mH values here to obtain the XL of this coil, then apply XL to E in a simple Ohms Law Calc to find I.
If the XL looks like it would limit the I to a certain level [figure the coil's XL as a stand alone element - without the motor being in the circuit], then it would allow a level of ground fault to flow which might not be viewed as overcurrent to the OCPD.
With the motor involved in the circuit, it will create a non-stable X [XL and XC], plus R in series with the coil during normal operation - unless it is idling, or at a constant load.
Also, the motor will be contributing I during a fault [level depending on the motor's load at the time of fault]. This will change everything on the Inductor [coil], which may go as far as removing the XL created in it from the original current flow [before fault].
Scott SET
BTW: Anyone come up with anything regarding the coiled wire around the Rigid Nipple, with the DC current flowing in another coil thingee??
