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Thursday, December 27, 2018
Question:
Re: CQD answer published November 29 and December 18, 2018 -
1) Hi Charlie, Thanks for your work, I have not submitted in quite a while. By wrapping the grounding conductor around the raceway you will create a choke effect much like the old BX cable that used the spiral metal jacket as a grounding means. A thin uninsulated metal ribbon is installed inside the raceway to shunt the spiral coils and defeat the choke coil effect. Rick Munch CMP 1 2005
2) I just want to say that I was very impressed with Jennifer's question regarding running the bonding conductor straight vs a spiral type of installation. Rich Van Wert
A
Answer:
Hey Rick and Rich thanks for your comments and kind words. Once the 2020 NEC is published it will be open for Public Inputs. If you have thoughts about the need to install external bonding jumpers in a straight line along the raceway instead of being spiraled around it please submit a Public Input. You will likely need substantiation such as testing data or evidence of problems to support the change.