The use of "whips" beneath the raised flooring is a common solution since my memory can remember, and they have been a "Good practice", however today the churn in the cabinets position and IT loads have taken these "boas" into a not so good solution; other issue is those data center that has been DESign without raised floor; so the "whips/boas" has been located on tray overhead the cabinets, hanging the electrical connectors from them.
This practice -boas under raised floor- has arose other issue AIRflOW blocking and this has been because the "whips/boas" have been laid on the floor and obstruct the pass of the airflow . 5-7 years before that was not a serious issue in a 30cm or 45cm heigth raised floor; because the thermal load in each cabinets rarely goes up than 4kW per location; but today with thermal loads going up to 8,10, and more the airflow is not enough to cool the IT equipment.
Of course the other cabling that also obstruct the airflow is the telecomm one, but in a next post I will comment on
Then what can do an OPErator for getting the beneath void with out these layed electrical cables? Well taking them overhead in trays of course and let that electrical connectors be dropped or set in a square duct
Today exist several several vendors that give to you these solution in a very flexible and cost effective way IF your data centre is:
CLOUD / COLO / HOST where the M.A.C.s are so often that a investment on busways is worth to evaluate.
Enterprise where do you want to have metering and several electrical connectors types (NEMA, IEC, special, etc...) could be more difficult to embrace this solution. But reliabilty can decide for this option
Of course every OPErator must understand the pros´ and cons´that any electrical distribution carry on.
or what do you think?
Roberto Sánchez, RCDD