I've read (at the Martin Technical website, http://www.martinarcflash.com/labeling.htm) that they do not consider Arc Flash Analysis of motors 75hp or less contribution. I cannot find any information other than their website to substantiate why or what standard they are following that would...
I am searching for the words, in the AEH, NEC, IEEE, etc., that give guidance that it is acceptable to replace a blown fuse once before commencing troubleshooting on the condition that the replaced fuse does not immediately blow following replacment.
I am being asked to show proof of this...
Where can I get some information on good plc I/O connection practice?
My question is basically whether I should be connecting my I/O's to an isolated common or should the modules be independently common of each other?
The reason I am asking is because I found that the (-) output 0-10Vdc...
I am getting conflicting discussion regarding grounding unused/spare conductors in a cable. My VFD manual Power Wiring section says unused wires in a conduit must be grounded at "both" ends to avoid possible shock hazard caused by induced voltages.
Now granted I am universally trying to apply...
I am designing a control circuit that will provide control contact for a 120VAC and the other contact will control a 24VDC circuit. Has anyone done this and, if so, should I be concerned?
To throw another variable into the design, the control circuit will be adjacent to a VFD which I am more...
I need to connect a 10HP, 3ph motor to contoller box. Do I have to use conduit or can I use cable? The run is less than 10ft. Am I bound by NEC 400.7 Uses Permitted? because it is not specifically Not Permitted per 400.8. I just find it hard to believe that this would not be allowed.
