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https://www.electricalforum.co.nz/index.php?action=more_details&id=1526592349
Oct 07, 2019 · As far as I can tell the bonding of the service support conductor should have no effect on the polarity test unless the house is steel framed. If the house was steel framed and the polarity at the supply end of the service main was incorrect testing using the NZ trailing earth method should pick it up.
https://www.standards.org.au/StandardAU/Media/SA-Archive/Documents/Wiring_Rules_FAQs_March_2010.pdf
(i). the switchboard/meter enclosure, riser bracket etc is earthed by a bonding conductor connected to the main neutral conductor in accordance with Clause 5.5.3.5(a); or (ii). double insulation is maintained to the service protective device on the switchboard/meter enclosure.
https://iaeimagazine.org/magazine/1998/98november/service-main-bonding-jumpers/
The main bonding jumper is one of the most critical elements in the safety grounding system. This conductor is the link between the grounded service conductor, the equipment grounding conductor and in some cases, the grounding electrode conductor. The primary purpose of the main bonding jumper is to carry the ground-fault current from the service enclosure as well as from the equipment ...
http://www.prospex.us/DOCS/ELECTRICAL/ELECTRICAL%20SYSTEM%20BONDING%20AND%20GROUNDING%20.pdf
Since the grounded/neutral service conductor serves as the effective path for ground-fault current, it has to be sized large enough to safely carry the maximum fault current that is likely to be imposed on it. The grounded/neutral service conductor cannot be sized smaller than the required grounding electrode conductor.
https://www.electricalforum.co.nz/index.php?action=more_details&id=1370053366
Jun 04, 2013 · CraigG Jun 01 2013 16:53. The reason why it is done this way is that the N and E bus bars in the event of a transposition of the Active and Neutral connections would be a 230 Volts with respect to the mass of earth, and if you removed the incoming neutral and / or main earth connections this is a major safety hazard.
https://www2.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=28503
Oct 08, 2007 · But you are presuming parallel paths exist - not always the case. In some instances, dependant on the geography of the incoming services, the bonding conductor may only be a matter of a few feet long. Additionally, the bonding conductor may not actually be a cable - it could be a big lump of steel structure with fly leads at either end.
https://www.ecmweb.com/national-electrical-code/code-basics/article/20897016/grounding-and-bonding-part-1-of-3
Service equipment. Bond all metal raceways and enclosures that contain (or support) service conductors [250.92]. Interestingly, the NEC requires raceways and enclosures that contain feeder or branch conductors to connect to the circuit “equipment grounding conductor” [250.86], which is actually a bonding conductor [Art. 100].
https://www.electricalforum.co.nz/index.php?action=more_details&id=1526592349
Oct 07, 2019 · As far as I can tell the bonding of the service support conductor should have no effect on the polarity test unless the house is steel framed. If the house was steel framed and the polarity at the supply end of the service main was incorrect testing using the NZ trailing earth method should pick it up.
https://www.standards.org.au/StandardAU/Media/SA-Archive/Documents/Wiring_Rules_FAQs_March_2010.pdf
(i). the switchboard/meter enclosure, riser bracket etc is earthed by a bonding conductor connected to the main neutral conductor in accordance with Clause 5.5.3.5(a); or (ii). double insulation is maintained to the service protective device on the switchboard/meter enclosure.
https://iaeimagazine.org/magazine/1998/98november/service-main-bonding-jumpers/
The main bonding jumper is one of the most critical elements in the safety grounding system. This conductor is the link between the grounded service conductor, the equipment grounding conductor and in some cases, the grounding electrode conductor. The primary purpose of the main bonding jumper is to carry the ground-fault current from the service enclosure as well as from the equipment ...
http://www.prospex.us/DOCS/ELECTRICAL/ELECTRICAL%20SYSTEM%20BONDING%20AND%20GROUNDING%20.pdf
Since the grounded/neutral service conductor serves as the effective path for ground-fault current, it has to be sized large enough to safely carry the maximum fault current that is likely to be imposed on it. The grounded/neutral service conductor cannot be sized smaller than the required grounding electrode conductor.
https://www.electricalforum.co.nz/index.php?action=more_details&id=1370053366
Jun 04, 2013 · CraigG Jun 01 2013 16:53. The reason why it is done this way is that the N and E bus bars in the event of a transposition of the Active and Neutral connections would be a 230 Volts with respect to the mass of earth, and if you removed the incoming neutral and / or main earth connections this is a major safety hazard.
https://www.ecmweb.com/national-electrical-code/code-basics/article/20897016/grounding-and-bonding-part-1-of-3
Service equipment. Bond all metal raceways and enclosures that contain (or support) service conductors [250.92]. Interestingly, the NEC requires raceways and enclosures that contain feeder or branch conductors to connect to the circuit “equipment grounding conductor” [250.86], which is actually a bonding conductor [Art. 100].
https://www.mikeholt.com/instructor2/img/product/pdf/1292448885sample.pdf
the equipment grounding conductor [259.118], MBJ rep-resents the main bonding jumper, SNC represents the service neutral conductor (grounded service conductor), GEC represents the grounding electrode conductor. Figure
https://iaeimagazine.org/magazine/features/bonding-grounding-and-neutral-conductors-does-size-really-matter/
Now is a good time to re-visit the Code definition of bonding conductor “ Bonding conductor — a conductor that connects the non-current-carrying parts of electrical equipment, raceways, or enclosures to the service equipment or system grounding conductor,” and review the portion of this definition that describes connection of the bonding ...
https://www2.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=28503
Oct 08, 2007 · But you are presuming parallel paths exist - not always the case. In some instances, dependant on the geography of the incoming services, the bonding conductor may only be a matter of a few feet long. Additionally, the bonding conductor may not actually be a cable - it could be a big lump of steel structure with fly leads at either end.
https://www.ecmweb.com/national-electrical-code/article/20889345/grounding-bonding-definitions
Main bonding jumper [100]. A conductor, screw, or strap that bonds the equipment grounding (bonding) conductor at service equipment to the grounded neutral service conductor in accordance with 250.24(B). (For more details, see 250.24(A)(4), 250.28, and 408.3(C).) Solidly grounded [100]. The intentional electrical connection of one system ...
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