A co-worker of mine encountered a KD problem a few years ago - misoperation in service but no problem when bench tested. Turned out to be an internal fault to the relay frame, high enough in impedance not to effect supply voltage but enough to skew operation. Westinghouse instruction manual...
From a compliance standpoint, it sounds like your equipment would fall under UL508A. 508A does not accept miscellaneous class fuses for motor protection.
If I read your fuse spec correctly, it has an interrupting rating of 200 Amps. Although the fuse is listed by UL, it is not listed for...
UL 508A and NFPA 79 have the information you are looking for in terms of what is acceptable for this unit.
But the everyone else is correct in terms of acceptance by an inspector or AHJ. No listing or label on your controller / disconnect and you stand a good chance of being shot down. If you...
The latest NFPA 79 (if we might be discussing Industrial Machinery) leaves some room for interpretation. It says both Emergency Stop and Emergency Switching Off - note two separate definitions, require a single human action to initiate. But under Emergency Switching Off they specifically...
Looking at Tyco's website they appear to have test data available for their termination kits showing they meet the applicable IEEE standard for each type. If this is a paperwork drill for your QC folks the test documentation may meet their requirement. Try this link ...
You've indicated your local inspector has already offered direction on his requirements, is he likely to accept the violation you want to install? Establishing parallel paths for ground faults can have unexpected effects on low-voltage ground fault systems. Remember, one of the primary...
What standard is applicable to a television transmitter installation? I tried searching the UL website and the majority of the references were for televisions, video or IT equipment.
