Multibus II system using iRMX III and Dos 6.2
There are many generic ANSI C statements (eg) printf("Process Init \n);
The printf is not directed to stdout under iRMX
The printf statements do not show up on any screen, does not show up redirected to a com port , lpt port , etc.
What steps...
Gianoli,
I assure you it is challenging but very possible.
I have a new question:
We have a resistance grounded neutral that limits ground fault to 1200 amps. So Im thinking we should use that for sizing the ground cable rather than the 4000 amps of the breaker rating? The grounding grid of...
Wait a second... this is exactly why I asked my initial question. I was made fun of because professionals who study this should not be asking this but now we are saying that NEC does not require a ground in each conduit ("The fact that this has been accepted is supported by some of the duct...
I have been vague to get general information b/c of the disagreemet on how to ground this system among qualified engineers doing studies - part of the issue was not so much a code issue due to the fact that in practice for this size cable you hardly ever see a 500 kcmil gnd ran in each conduit...
We are using pvc so conduit as a ground is not an option. We will be using 500 kcmil/ conduit. It is underground and thermal derating played a large role in the layout of the duct bank.
One issue is how do you tie together 12 500 kcmil grounds and what does it do for if the equipment ground...
According to 250.122(F)(2) does the cable have to be a multi conductor cable? Or would the case I have mentioned, 3 500 kcmil/conduit, be able to be sized in accordance with Table 250.122 based on the trip rating of the GF protection of the equipment (of course meeting the 3 conditions...
Thanks,
I have concluded that I would be in violation if I did not have a minimum of one 500 kcmil ground conductor/conduit in this application.
However, I dont think this is the common practice. I have come across engineering firms that often do not even run ground wire in conduit. They put...
No offense taken. I have looked at 250.122 prior to this post, and I am familiar with it. You are driving home a point which leads to my next question. I am having trouble with the interpretation of T250.122. Hypothetically, lets say we have a single cable/per phase (thus 1 conduit) to pull...
The overcurrent device would be a micro-51. Are you saying it depends on the settings of the ground fault relay to determine the size of the grounding cable?
It is actually twelve 500kcmil/phase. Need current carrying capacity for over 3000amps.
Be Safe.
Say you have 4000amp feeder breaker feeding 4 conduit sets of three 500mcm cables at 34.5KV on a 800 ft run (lets assume pvc buried 6 ft in the ground). So, we have 4 conduit runs with three 500mcm cables per conduit.
My question is what size grounding cable does the NEC require to run in each...
I understand that the primary (conductor) passing through the window CT creates a magnetic field that induces voltage/current in the secondary of the CT. This makes me think a window CT will work on a shielded cable because the shield is designed to create a unified electric field. My question...
