dougjl
Electrical
- Sep 14, 2001
- 44
Hi,
I have an installation where two sets of parallel 400 MCM conductors were installed in a cable tray. They were installed as individual conductors in a single layer. The voltage of the system is 480 three phase and the circuit is feeding from a switchgear to an MCC MLO main.
An engineer at the site claims that this installation is not normally used in industrial environments as this arrangement will cause noise and over heating of the cables. He then said that if the parallel runs were multi-conductor cables that there would be no issues. I am having a hard time understanding how that would make a difference. The individual cable were arranged phase a, phase b, phase c, phase a, phase b, phase c. Each of the conductors were zip tied to the tray and next to one another (no spacing). Code clearly allows this type of installation. Can anyone explain how a the multi-conductor arrangement is better? I really don't understand why there is a problem.
Thanks,
Doug
I have an installation where two sets of parallel 400 MCM conductors were installed in a cable tray. They were installed as individual conductors in a single layer. The voltage of the system is 480 three phase and the circuit is feeding from a switchgear to an MCC MLO main.
An engineer at the site claims that this installation is not normally used in industrial environments as this arrangement will cause noise and over heating of the cables. He then said that if the parallel runs were multi-conductor cables that there would be no issues. I am having a hard time understanding how that would make a difference. The individual cable were arranged phase a, phase b, phase c, phase a, phase b, phase c. Each of the conductors were zip tied to the tray and next to one another (no spacing). Code clearly allows this type of installation. Can anyone explain how a the multi-conductor arrangement is better? I really don't understand why there is a problem.
Thanks,
Doug