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Equipment Grounding Conductor on the outside of a …
https://forums.mikeholt.com/threads/equipment-grounding-conductor-on-the-outside-of-a-raceway.89620/
The NEC limits the bonding jumper to 6ft (with and exception for a pole top bond). 300.3 (B) requires all conductors to be grouped together - the further apart the circuit conductors are, the greater the impedance as the magnetic fields don't cancel. The NEC doesn't tell you the why, only the how. For the why, read the IEEE green book.
Running equipment grounding conductor outside raceways.
https://www.eng-tips.com/viewthread.cfm?qid=405459
You should only consider running a separate grounding conductor outside of non-magnetic armoured cables. In the case of steel raceways the ground conductor must always be within the same magnetic enclosure as the power conductors. For parallel runs in more than one steel raceway best practice is to include a grounding conductor in each raceway.
Behind the Equipment Grounding Conductor - EC&M
https://www.ecmweb.com/national-electrical-code/code-basics/article/20886140/behind-the-equipment-grounding-conductor
For example, if you route three No. 10, two No. 12 and three No. 14 conductors in the same raceway, you can pull a No. 10 EGC through the raceway to serve as a grounding means for all circuit conductors. When you install a No. 6 or smaller EGC, the insulation along its entire length must be colored green or green with one or more yellow stripes.
Grounding Requirements for Conductor Enclosures
https://www.ecmweb.com/code-quiz-of-day/article/20899678/grounding-requirements-for-conductor-enclosures-raceways
Part IV of Art. 250 covers the bonding and grounding requirements for enclosures, raceways, and service cable connections. As noted in Sec. 250.86, "Except as permitted by 250.112 (I), metal enclosures and raceways for other than service conductors shall be connected to the equipment grounding conductor." Sign up for EC&M eNewsletters
Equipment Grounding Conductors.
https://www.electricallicenserenewal.com/Electrical-Continuing-Education-Courses/NEC-Content.php?sectionID=981.0
NEC Section 250.118 provides a list of items that can be used as an equipment grounding conductor including: (1) A copper, aluminum, or copper-clad aluminum conductor. This conductor shall be solid or stranded; insulated, covered, or bare; and in the form of a wire or a busbar of any shape. (2) Rigid metal conduit. (3) Intermediate metal conduit.
Grounding and Bonding — Part 1 of 3 - EC&M
https://www.ecmweb.com/national-electrical-code/code-basics/article/20897016/grounding-and-bonding-part-1-of-3
If circuit conductors are spliced or terminated on equipment within a metal box, then the equipment grounding conductor associated with those circuits must be connected to the box per 250.148. If outside of a raceway, these conductors can’t be longer than 6 ft and must be routed with the raceway. Piping systems and exposed structural metal
Understanding Raceways - EC&M
https://www.ecmweb.com/national-electrical-code/code-basics/article/20903368/understanding-raceways
• Metallic raceway can serve as an equipment grounding conductor (EGC), provided it meets the requirements of Sec. 250.118, but nonmetallic raceway must include a separate EGC (wire type) [Sec. 362.60] when an EGC is required.
Outside Raceway or Enclosure | UpCodes
https://up.codes/s/outside-raceway-or-enclosure
equipment bonding jumpers and supply-side bonding jumpers installed for bonding grounding electrodes and installed at outdoor pole locations for the purpose of bonding or grounding isolated sections of metal raceways or elbows installed in exposed risers of metal conduit or other metal raceway, shall not be limited in length and shall not be …
440.9 Grounding and Bonding. - ElectricalLicenseRenewal.com
https://www.electricallicenserenewal.com/Electrical-Continuing-Education-Courses/NEC-Content.php?sectionID=929.0
Where multimotor and combination-load equipment is installed outdoors on a roof, an equipment grounding conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use non-threaded fittings. 2020 Code Language: 440.9 Grounding and Bonding.
Choosing the Right Raceway - EC&M
https://www.ecmweb.com/national-electrical-code/code-basics/article/20896212/choosing-the-right-raceway
Section 342.46 in the 2011 NEC clarifies how this protection should be provided: To protect conductors from abrasion, a metal or plastic bushing must be installed on conduit termination threads, regardless of conductor size, unless the box, fitting, or enclosure is designed to provide this protection [342.46] (click here to see Fig. 1).
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