Cable Installation Question

[nightfox1925]

The Code permits isolated phase installation with certain requirements.

In both low voltage and medium voltage installations, some installations I have seen used isolated phase grouping of cables and they all go straight to the terminations without any problems. The conduit bushings at the terminal points are bonded using a bonding jumper to cancel out heating due to induction.

Did I miss anything here. Is this type of cable installation has any effect to induced current heating along the cable run?

GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata

 

[davidbeach]

It works only where there is no magnetic path that completely surrounds anything less than a balanced three phase circuit. Conduit bushings would be aluminum or brass, steel bushings would become extremely hot and a bonding jumper wouldn't do anything to mitigate that heating.