Grounding 4160 Switch Gear
Grounding 4160 Switch Gear
(OP)
We have multiple 46/4160 transformers in our substation that feed switchgear inside our facility. The power cables are teck, and run in multiple cable trays. In a recent inspection we noticed that there was no bare ground to each switchgear (they are old installations). Should we have seperate bare ground conductors to each switchgear from each power transformer? When we have multiple power cables in a tray would be need to bond both bare cables? If one power transformer feeds multiple switchgears, does the bare ground need to come directly from the transformer ground to each one, or can you run one and tap off to each switchgear?
Thanks.
Thanks.






RE: Grounding 4160 Switch Gear
If in fact there is no equipment ground, you should probably install one. The ground can be tapped if it is sized adequately for the largest upstream overcurrent protection. In the case of multiple cables, if they are from different sources, it must connect to all sources. That can create protection problems. I would recommend careful analysis of the installation by a qualified engineer before proceeding.
RE: Grounding 4160 Switch Gear
RE: Grounding 4160 Switch Gear