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The cables are being used for excitation of a 200 MW Generator. There are 6-1550s. Each has an individual press on two hole lug. Then 3 cables will be bolted to a terminal buss and three to the other terminal buss. There are a total of 2 terminal busses in the enclosure. The enclosure presently...

Each cable will have a 2 hole press on lug. Then 3 cables will be bolted to each buss.

I have 3-1550 MCM cables per lug terminating in an enclosure. The '99 NEC Table 373-6b list cables in this situation up to 900 only. Cables 1000 and larger have no figures in the colum. How do I determine space required?

The code states that 4" is the max. size allowed for liquidtight flex. If this is correct, why is larger sizes even made? I have 6" all over my jobsite.

Art.351-5 NEC states that the maximun size allowed is 4 inch. If this is so, why is larger sizes,(6 inch),even made? There is a lot of 6 inch liquid tight flex used on my jobsite. Is this permissible? NEC Art.?

I need any info relating to conduit installation, sealoff, dos and don't, diagrams, etc. in a class 1 div 2.area.