Les Fischer
Member
I have a 12470v system feeding from switchgear to a capicator bank . Do I ground the shields on the cable at the switchgear and capicator bank ???
12470
- Thread starter Les Fischer
- Start date
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- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Les Fischer said:
Technically shields only need to be bonded on one end. Connecting both ends can create circulating currents.
Practically, circulating currents are usually only problems in cable lengths measured in the 1000s' rather than in the 10's.
jtester
Senior Member
- Location
- Las Cruces N.M.
I always understood that if you didn't ground both ends of a sheath, the end farthest from the ground connection could develop a significant potential to ground, even though it "grounded".
I am aware that one end grounding used to be common, but I thought a NEC change now forbids it. I'm still looking for the change.
Jim T
I am aware that one end grounding used to be common, but I thought a NEC change now forbids it. I'm still looking for the change.
Jim T
http://www.okonite.com/engineering/shielding.html
This is an article from Okonite Cable on the subject. Look toward the middle of the page for information on your question.
This is an article from Okonite Cable on the subject. Look toward the middle of the page for information on your question.
jtester
Senior Member
- Location
- Las Cruces N.M.
Great info, thanks Bob
Jim T
Jim T
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
bob said:
Looks like I it backwards.
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