THE NATIONAL ELECTRICAL CODE, ARTICLE 250, GROUNDING, PARAGRAPH: 250-122(f),(1): STATES " EACH PARALLEL EQUIPMENT CONDUCTOR SHALL BE SIZED ON THE BASIS OF THE AMPERE RATING OF THE OVERCURRENT DEVICE PROTECTING THE CIRCUIT CONDUCTORS IN THE RACEWAY OR CABLE IN ACCORDANCE WITH TABLE 250-122...
Ian,
I APPRECIATE YOUR RESPONSE TO MY CONCERN. BUT I AM INTERESTED IN KNOWING IF THE IMBALANCED LOAD WOULD CAUSE THE EQUIPMENT GROUND CONDUCTOR FROM ONE TRANSFORMER TO SEE A VERY HIGH CURRENT FLOW WHICH WILL CIRCULATE BACK TO THE OTHER TRANSFORMER VIA ITS GROUND CONNECTION?
ARTSAND88
ARE THERE ANY POTENTIAL PROBLEMS OR HAZARDS IN WIRING THE SECONDARIES OF TWO TRANSFORMERS IN PARALLEL.BOTH TRANSFORMERS HAVE THE SAME CHARACTERISTICS AND SECONDARY FEEDERS ARE INSTALLED OF EQUAL LENGTHS AND PROPERELY PHASED (A, B, & C) OUT TO LOAD. BOTH TANSFORMERS SHARE THE LOAD EQUALLY AND...
SEVERAL VFD MANUFACTURERS HAVE MENTIONED IN THEIR SPECS THAT THE MOTOR LOAD SHOULD NOT BE LOCATED BEYOND A SPECIFIC DISTANCE FROM THE VFD.
WHAT IS THE TECHNICAL REASON FOR THE DISTANCE LIMITATION BETWEEN THE VFD AND ITS MOTOR LOAD?
IF IT IS A VOLTAGE DROP CONCERN , THE CONDUCTORS TO THE MOTOR...
