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@ Scotty.... Why 20mm / 25mm dia. conduits aren't used for the FO circuits as what you have mentioned ? I believe these should be OK for smaller cables like F.O 4 core etc.

What is the allowable % load & % voltage imbalance in Distribution Panels as per NEC and IEC regulations ?

Thanks ScottyUK..

@ ScottyUK ... As per KSA regulations where NEC and IEC standards are being followed

Is it allowed to run 220V power cable and Fiber Optic Comminication Cable together in a single conduit ?

My reply is more of a practical experience. I work in Saudi Arabia. Generally the window ACs are installed in residential buildings and the operations are manned controlled - that is the ACs are manually switched OFF when dwellers move out of house and then switched ON when required. Hence the...

[b]I have a house with lot of roof catchment area which is ideal to collect rain water for charging a ground well about 60 feet deep. Where can I get the technical details to construct a good mechanism, especially the filtration system for the rain water before it is charged into the well.

Answer to the original question. The pump is pumping IN water into the sphere container on a higher pressure during the energy storage cycle. Upon taking back the stored energy, the pressurized water inside the chamber is made to flow into the ocean through the turbine ( pump does not run during...

@ waross - has the transformer vector group selection to do anything with the type of load installed - inductive , capacitive ?

Thanks to all for valuable inputs

Post your question on www.ases.org ( American Solar Energy Society )

Thanks to both for your feedback. Actually my question is specific - the impact of sudden load changes to Inverter based AC Power and Rotating Machine based. For example, if the sudden load change is from group of induction motors, which system from the two would perform best ?

@ dpc - the inverter is getting power from Solar Panels.

what are the limitations of inverter based AC Power towards load change as compared to AC Power from rotating machine (turbines )?

In the actual scenario, an L-G fault to any phase at the load side would result in over voltage of other two healthy phases by a factor of 1.732 if neutral is un-grounded. Therefore, as advised in above threads, the grounding resistance and continuity of neutral conductor from the transformer...

@jraef - A good catch indeed !

@jraef - A good catch indeed ! http://www.eng-tips.com/viewthread.cfm?qid=357789

@ mikekilroy - what impact would be from the higher voltage ( 460 V is 21 % higher than the rated nominal of 380 V )