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PeteRig

Just adding to what you have asked, in the draft 5033:2021 if goes through unchanged the DC cabling will not be able to within 600mm of a ceiling, flat roof situation cabling has to be within 1m of external walls, the requirements come with good diagrams to show what is required. One of the reasons ...

PeteRig

In answer to your question the three TS's the other day had RCD's not RCBO's I have also asked around and the feedback I am getting is not compliant and not good practice if it was a compliant. Just found out these TS's are manufactured in Palmerston Nth, and wired by a local electrical company, so ...

PeteRig

Fair call Jamie on ESR 73A, so yes probably agree with you, good discussion though but unable to answer your question sorry.

PeteRig

Wow, there is so many of these set ups out on construction sites, so as they come up for renewal they will be failed then?
If so, this info would possibly not be known by others. Big issue I think

PeteRig

Thanks for all the valuable info Alec

PeteRig

Giving this more thought the cascading/plug and play system is a rubbish system that opens the installation up for many errors, when any site shed can be connected to the arrangement by a layman, you could possibly end up with 10 sheds cascading off one socket outlet, overloading could be an issue b...

PeteRig

An inspector cant do the connection and inspection as the connection is PEW (ESR 73A and 71) if for example it is "works" and the inspector is authorised to work on the network or installing a revenue meter he could do both, connection and inspection?

PeteRig

Cheers Alec, clears it up I think, only can fail on excessive earth resistance but then I will try to clean the contacts to get a "pass" result anyway.

PeteRig

So would that be a fail under 3001 C7.5 if you didn't clean the contacts you wouldn't achieve the required earth readings as mentioned above, so that is why covers are required to achieve compliance to C6.5.
Not sure why some brands sell inlets without covers though.

PeteRig

Thanks Alec, the inlets are Gewiss model GW 60 437, looking on the web site I believe that they dont make covers for these inlets and as mentioned there seems to be a lot of inlets in the 32A range that dont have covers. https://www.gewiss.com/ww/en/products/experience-catalogue/catalogs/series/prod...

PeteRig

AS/NZS 3012:2.9 (d) requires socket outlets installed on the outside of a transportable structure to have the outlet protected by an RCD but the exceptions for that clause say " not if supplying other transportable structures...." This scenario is often used on construction sites but what is to stop...

PeteRig

Does an appliance inlet require a cover, so that when the connector is not install the pins of the inlet are protected from the elements. The reason for asking is some of the 32A inlets dont have covers not like the 16A versions that all seem to have them. AS/NZS 3001 clause 3.2.2 (c ) ii -requires ...

PeteRig

Hi Jamie, I think the keys words are "PEW in the final step ...... " so terminating the conductors is the final connection in your scenario, operating a switch is not, its the same as installing a fuse, its not. Operating a "locked off" switch would go against ASNZS4836 and probably the H&S requirem...

PeteRig

Hi Jamie & Doug, I believe the 2.5mm earths wont comply as 5.3.3.1.2 says under exceptions : "where the summation of the csa does not correspond exactly with the nominal size of the active conductor given in table 5.1, the conductor shall be determined in relation to the nearest larger size of activ...

PeteRig

Thanks Alec, the term 'private network" gets used a lot especially by engineers, where as they should say "works/private works"? So the "private network" of a subdivision is "works" from the LV side of the tx, as the fittings are non-exclusive fittings until they become exclusive fittings to each dw...

PeteRig

Thanks Greg but how does that explain a private network subdivision which has no Main Switchboard?

PeteRig

Probably a stupid question but what is the definition of a private network or makes a private network, I have seen subdivisions in the area I live where they are called "private networks"? Not sure if the reticulation for the subdivision is metered at the transformer that supplies power to the dwell...

PeteRig

If you are a Project Manager of an electrical project, can you as the PM inspect any hi risk work undertaken on this project or is Project Managing regarded as supervising as per Reg 71 2(b), there will be an electrical site supervisor as well. Indirectly the Project Manager is supervising and overs...

PeteRig

In AS/NZS 3000:2007 Fig 5.2 shows a HV Customer Substation supplying a Main Swb (no MEN link) are the conductors supplying this swb "mains" ? ESR reg 4 has the definitions of "mains" and "mains work" both refer to connecting the conductors to a MEN switchboard. If the POS is the substation then, no?...

PeteRig

My thoughts also Jamie, but the engineer is going down the track that the apts are not in an outbuilding due to the construction of the fire rated walls etc. If he is prepared to make it a certified design then ok. Thanks.

PeteRig

If you have a standalone outdoor Main Swb IP rated on a concrete plinth on a site (point of supply is upstream), that has multiple fuses to supply Dist cabinets on this site, from these Dist Cabinets, mains go to apartments located in multiple blocks (separated by land). Each block for example may h...

PeteRig

Interesting Alec, so are you saying that ESR 65 (1) tells us when a COC must be issued but no where it says, who has to issue it, so for example you or anybody else (if brave enough) could issue a COC for work I have done, even though you dont know me or haven't seen the work I completed? Do you thi...

PeteRig

I believe its 25mm, if the mains are larger ie long run for volt drop, break the cable down to suit the fusing

PeteRig

I have a scenario where there is multiple apartments (each with their own title) in the same building, there is a Common Main Switchboard incl meters (in a Common area) and some of the apartments submains will need to run through the ceilings of other apartments to the MSB, due to the construction o...

PeteRig

You would be looking for clause 2.3.2.1 in AS/NZS3000

PeteRig

Hi Chaz, if you are talking about the white 2.5m 2C + E TPS, it came out in the seventies (I was just finishing my apprenticeship), it was manufactured when the cable sizes transition from imperial to metric and it was very difficult to work with. It wasn't around along and got changed to the presen...

PeteRig

Looks like MBIE is after feedback in regards to updating the ESR to reflect some of the latest standards.

https://www.mbie.govt.nz/have-your-say/ ... gulations/

PeteRig

Thank you for clarifying Alec, the reason I asked was I have heard of Off grid earthing been interpreted as not requiring an inspection and this came from a person who does training.

PeteRig

Hi Greg, yeah I was going off track, I was referring to Alec last post about earthing systems Off grid, any thoughts?

PeteRig

So Alec, in ESR 4) mains work b)i) "(b) does not include— (i) work on fittings that are used or intended for use by any person in, or in connection with, the generation of electricity for that person’s use and not for supply to any other person; or" What does this mean? If Off grid the earthing syst...

PeteRig

Thanks Greg and thanks Alec for a detailed answer

PeteRig

Thanks for confirming Greg

PeteRig

Does a private network of a couple hundred dwellings still require inspections for the High Risk work, eg MEN, mains, earthing and electrode to each dwelling, I think so?

If this is High Risk work does it still require to be registered on the High Risk data base?
Thanks Peter

PeteRig

https://www.worksafe.govt.nz/about-us/n ... v-systems/

This link has been around for a few years now, from Worksafe.

PeteRig

Hi Alec, yeah you don't know how the circuit is wired but I just thought the power is off while you are changing the ppt, and you have run out a trailing lead to check the polarity so not much more effort to check the power outlets in the area you are working in, you could assume any outlets with no...

PeteRig

I would say technically yes, as you are the last person working on that circuit but hey I am probably wrong, Alec will confirm. I know it also probably wouldn't get checked either.

PeteRig

Yes, like Alec says if you dont check the polarity of the socket outlets upstream to the one you are replacing you dont know if the wiring has been transposed at them, makes a quick job turn into something a bit longer.

PeteRig

I suppose also Nathan you cant stop people and their actions, if someone wants to waterblast a power outlet you cant stop them

PeteRig

Cheers again Alec

PeteRig

Fair comments Alec and appreciated, my concerns are that inverter technology hasn't kept up with the PV panel technology, so a lot of inverters are not rated now for the panels in regards to short circuit currents, so by having a third party inspect will hopefully check the inverter specifications, ...

PeteRig

Hi Alec, if you replaced a PV grid connected inverter, this would be Hi-Risk?

PeteRig

Hi Alec, I wonder why, when batteries are connected to a PV system >ELV and mains parallel generation that they are not regarded as High Risk Work as they form part of the PV system if DC coupled and even when AC coupled they are connected to communicate with the PV inverter for operating purposes. ...

PeteRig

I believe if you follow AS/NZS 5139:2019 (even though not cited) for battery installs you cant go wrong, at least you have followed the best practices available. The Electron magazine, Issue 103 (August 202) the "Board " recommends that electrical workers are able to reference the latest version of ...

PeteRig

Hi Alec, I believe the OP when using the term "gyro" is referring to the company Gryo Plastics whom make underground distribution pillars.
Peter

PeteRig

Thanks Alec, agree with what you say, that is why I was asking if crimp links were fittings but don't need to be accessible, yet j/boxes are also fittings but should be accessible, confusing.
Cheers

PeteRig

Thanks Greg, have gone done that avenue, so hoping its now a closed case and we don't waste any more time, the joys of contracting!

PeteRig

So a j/box in a lined wall would be non compliant?

PeteRig

Yeah Greg, we have explained all that to him etc etc but as this is a 4 year contract we have substantial commercial interests in this project, not saying we would do anything from what we are required to do but the last thing the Head Contractor wants is a sub contractor upsetting the local council...

PeteRig

Ok, so an inline crimp joint on a TPS cable in say a wall, does that fail under the requirement of ESR 20-2 (i) "i) there is insufficient space, access, and lighting to operate, maintain, repair, test, and inspect all fittings of the works and installations (other than cables and buried parts of ear...

PeteRig

Hi All Maybe a stupid question but are crimp links "fittings" as the definition in the Act for fittings say "fittings means everything used, or designed or intended for use, in or in connection with the generation, conversion, transformation, conveyance, or use of electricity" so if a TPS cable is c...

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