Has anyone out here have any experiences (good or bad) with the "racking" functionality of Siemens TiaStar MCC buckets (breakers or starters) particularly the larger size 4 and 5 starters?
Can someone point me to which standards make up plenum rated cable? I know that plenum rated cable has a special insulation/jacket that has low smoke and low flame characteristics, but are there cables that meet certian standards that meet the intent of plenum rated, but might not be marked as...
I agree that 50kA seems high, but that is the best info I have to go with. Right now it looks like I'll be using 3 strings of Enersys DX-27B. Each string will be 60 cells. I have not been able to find this in their literature but when I call their support number Enersys told me the DX-27B has...
I'm in the process of designing a 125VDC battery for a power plant. This battery will be the DC supply for the 120VAC inverter as well as the switchgear, 2 emergency oil pumps, and other misc. users throughout the plant. I've sized the battery per the load profile I developed and determined...
Was wondering if anybody had some thoughts on this?
What is a recommended method for evaluating insulation resistance (IR) test results of Heat Trace cables? The system in question was put into service 10 years ago, and to the best of my knowledge IR tests have not been done routinely so there...
My apologies in advance if this is not the place to ask this question.
I was wondering if anybody out there had any recommendations for a course that would topically cover the changes to the 2011 edition of the NEC? Most of our work is in heavy industrial, oil and gas processing, and coal and...
I have a generator cooling room that houses the neutral connection point as well as the line side connection to interface with our IPB. The conductors used are rigid Al. tubes. Can somebody point me to a CSA or CES code/table that would address the clearance required from phase to ground...
We are building a new combined cycle plant in Ontario and have a 12' by 18' pre-engineered vendor supplied diesel fire pump building. I am no expert on Area Classification, but assume the interior of the building shoul be Cl. I, Div. 2, Grp, ?. Neither the NEC or OESC speaks to diesel fuel...
I am trying to track down a small length (~50 feet) of 1033.5 kcmil, stranded aluminum conductor, covered line wire the code name is Grapefruit. For use in an old 4,160V aerial distribution. Any ideas where I can find this?
A couple of manufacturers have already said that they would be...
Thanks for all the help.
To answer a few questions the switch can not be located outside the hazardous area because we are reworking/refeeding a few existing 4160V-480V transformers that are smack dab in the middle of the plant.
I am still waiting on a price quote from the local G&W rep...
I am trying to spec a 600A 5kV fused disconnect switch to be installed in a Class I, Div 2 hazardous area.
The two options I am currently aware of are:
Seal up the enclosure and pressurize it per NFPA 496, since this would be a 4 section switch that is an awful big enclosure to pressurize...
We have an old (circa 1961) Powell P2000 480V MCC that I need 2 size 5 starters for.
Powell says that this is obsolete and that they can't do anything for me except add a section of CH and transistion from the existing to the new.
I was wonder if anybody out there had some recommendations...
