Recent content by tinotoro

I am just trying to know more about the product, why a panel originally labeled at 208V 3ph 4w would not work at 240V, 3ph 4w. All the breakers are 240V and main is 600V. I am struggling to get feedback from manufacturer. I understand that there might be a certification issue, but technically...

Does EV charging station 950VDC rated require grounding grid with ring and 4 rods, similar to transformer station.

I run across the exact same situation as thread 248-355633, IEEE 998 covers substation protection but doesn't mention buildings. what standard should be used for buildings or how is IEEE998 applied to buildings?

Thanks for the feedback. I am referring specifically to the IEEE 835 ampacity tables for 'triplex' cables. Are they approved to 3C AC or TECK cables?

Thanks for all the inputs. Would it be correct to assume that the ampacity tables in IEEE835 for triplex cables are applicable to 3C cables?

Hi, what exactly is the difference between triplex and 3C cables in terms of ampacity. IEEE 835 refers to triplex cables and it could be interpreted that they would be applicable to 3C cables.

Thanks for the answers, the feeder to the ATS is already installed with sufficient size to feed both. The MCC is far and want to avoid pulling a second cable. I wonder if NFPA 20 allows to use the ATS power supply for this.

Can the jockey pump be wired directly from the ATS in parallel with fire pump, or should it have a separate feed from power supply?

See attached drawing.https://files.engineering.com/getfile.aspx?folder=ff5e5c1f-6b14-40d0-b3c6-76b2121c3c4f&file=VFD-2Motors.pdf

Thanks for the responses. Actually it is a very simple system, it is a vibration screen with two 5HP motors. There are no operation complications, they start and stop simultaneously. Still, there is a provision in the Canadian code about 'motor control' for two motors, that it should be rated...

I got a comment from an inspector in Canada that a VFD should be specifically be rated to power 2 motor simultaneously if intended for that application (he is referencing the CSA 28-500 (3-d), which refers to motor controllers in general, not specifically VFD's). I can't find any reference for...

Thanks Bill. I totally understand about the inspection thing. Nevertheless, code is pretty clear to me, it refers only to TC cables. I am hoping that this was already presented for inspection and had some feedback. It seems to me that not taking advantage of TECK approved specifications would be...

thread238-123759 Previous answer to this thread says that Canadian inspector determined that a barrier is required even for TECK cable. This would defeat the purpose of TECK cable and CEC code 36.100 explicitly references only to TC (tray cable) to require a barrier. Is there any experience...

Thanks. Is it possible to ask to the thread originator what was the outcome of his inquiry?

thread238-189742 I ran across this closed thread and would like to know what was the outcome. What is the solution that was implemented? Thanks