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Dan L

Is there any rules about distances of Aerial mains from trees?

From what I can see 3000 only mentions "structures" and I don't think a tree is a structure.

And NZECP34 1.1.4 says the code does not apply to hazards from trees so that's as far as I got.

Any input much appreciated.

Dan L

Thanks mate much appreciated

Dan L

Good point.

So why we are on the subject would I be correct in saying that for an EWOF rcd arrangement is not something that is a concern for appendix C or even part 1 if it were an import?

But not to get rcd arrangement confused with rcd type as rcd type is something that will need to be checked.

Dan L

Good to know.

So just to clarify as its a Connectable installation those rcd arrangement rules do not apply?

Dan L

Arrangements of rcds

not more than three final subcircuits shall be protected by any
one RCD

It does say for residential though.?

Dan L

Do the rules around rcds in 3000 apply to transportable structures? From the info in 3001 specific to rcds all I see mentioned is "sufficient" number of rcds used. Not sure if that Overalls 3000 though It does show in another diagram 3000 and additional rules of 3001. Not if that part is additional ...

Dan L

The EDMI meters are 35mm max

If cables are larger for vd or Ali Must be tailed down to 35mm or less and Cu

Pretty sure that goes for all Cat 1 meters.

Dan L

Thanks for the info much appreciated. I suppose it will come down to the situation and how bad it is In my particular situation the multiple units all have their main switchboards inside a cupboard that does not comply with 2.9. 2.5 I have noted changes that need to be made on roi and have sent an e...

Dan L

You say location is not part of inspection but what about person connecting can they be liable under (a) "73A Before connecting installations to power supply (1) Before connecting to a power supply a low or extra-low voltage installation or part installation on which prescribed electrical work has b...

Dan L

This is how I read it 4.4.2.1 " each socket-outlet shall be installed so that any plug intended to be used with the socket-outlet can be conveniently inserted and withdrawn" So if the only plug intended to be used is for the led than its OK. 4.4.2.2 Protection of socket-outlets covers your situation...

Dan L

Thanks that makes sense. While on the subject if it was not a switchboard but just a meter in an enclosure I assume that would not have to comply with these requirements as not a switchboard so could go in the room ot potentially a cupboard as long as it met network requirements "The enclosure shall...

Dan L

So I was asked to give advise on location of a main switchboard on a job before insralled The engineer chose location and the builder is pushing for it. I'm the inspector Thoughts on compliance They pushing to have main switchboard installed in this cupboard under stair or small room The main switch...

Dan L

Thanks for the input.

Dan L

It is intended so if one supply fails it will be switched to the back up supply. They both supply the same circuits. Both supplies share 1 earth bar and 1 neutral bar so has 2 MEN links on bars. Both supplies will be live all the time from their own transformer just one supply can only supply circui...

Dan L

Keeping in mind what others have said above the first switchboard from point of supply must be a MAIN MEN SWITCHBOARD. If it controls sub circuits and or sub mains ( even 1) then it will have to be a main men switchboard and comply with all the requirements of a main switchboard mentioned in Dougs l...

Dan L

Details Main switchboard has 2 main switches each with own seperate supply from a separate transformer (1400amps). There is a bus tie changeover switch allowing only 1 main switch supply to be on at any time. Each section has its own main neutral coming from its transformer, its own MEN link and its...

Dan L

Yes I understand that even though an inspector may do all these roles technically after the inspection hanging the meter is song a role of a meter Tech and livening is the role of a livening agent or person connecting but was just giving input of how things are actually done.

Dan L

I work on the Orion network as an inspector/ livening agent / meter Tech For us for a connection supplied from pole fuse the line mechanics will install fuse and connect load side and leave fuse for me to put in after inspection etc. ( not technically the way it should be done but that's how it is) ...

Dan L

I'm interested to hear other people's responses but Id be. Surprised if there is any information about the use of bootlace on tps because as far as I know they are only designed for multistranded cable. If the terminal is a clamp type then standard tps or multistranded can be terminated as is. If it...

Dan L

I see.

Maybe that's why it didn't make sense to me because it was not correct

Seems iv been mis informed.

Thanks.

Dan L

It's my understanding that the following examples of work are general risk. - moving a main switch to a different position on the switchboard to make space - installing a new mcb on mains or isolation point for example adding overcurrent protection mcb at outside meter box. . Generally working on ma...

Dan L

This has been a good info. I was a bit unsure about how much testing would be required Sometimes I have a bad habit of trying to make the rules fit common practises which are not always correct. When a meter is replaced procedure is only to test polarity and check meter box is earthed and MEN link i...

Dan L

Thanks much appreciated.

Pete are you saying you should do polarity test at all sockets in circuit upstream?

Dan L

This may seem very basic but after a recent discussion and differences of opinion just interested to here peoples views on tests required for replacing a power point. I would assume tests only required for work as per ESC. Replaced/ maintained power point to original condition - as3000 -Polarity -ES...

Dan L

Thanks mate much appreciated

Dan L

If the foundation is only in contact with the Rock ground is that still OK?

Seems horizontal earth will be best option here either way?

Dan L

Location surrounded by volcanic rock. Mains trench has been cut I to rock them will be filled in. As far as earth electrode options - horizontal - vertical - rio/ foundation Would all be Into rock I hear its possible for network to supply an earth from pos in some cases. In regards to the rules of l...

Dan L

Thanks.

Yes found it 3017 , 3.8
Much appreciated

Dan L

A main switchboard has been relocated. The new main switchboard and mains will comply with current standards. However the main earth is water pipe earth and may or may not need extended by a meter or two to reach new msb Only the new work must comply with today's standards however Must the new msb h...

Dan L

To put it simply for choosing the main earth size and the PE for switchboard can I work off tails?

( forget about PE selection by calculation in this question)

Dan L

Scenario...

120al mains with 50mm cu tails

160amp service fuse

What is the nominal size of active here?

Mains are not sized larger for vd

Dan L

Just seen a few overhead BTS recently less than 4.6m over driveway and wanted to check.

But yes I think so. I did say it was a stupid question lol

Dan L

Feel like this is a stupid question but in regards to table 3.8 does a driveway Into a domestic house count as area used by vehicles?

Dan L

seeing as everything is being replaced the same, fitting for fitting, e for e bar, n for n bar etc. And the mains conductors are the same, no settings changed and nothing new added. Coukd the relocating the MEC to earth bar count as to facilitate the replacement of a fitting with the modern switchbo...

Dan L

I fully agree but I'm part of an established company and nothing will change.

Well I know the reason the inspection is only at this stage is because wait time for inspection and livening is months so the electrician did this to get power to house so people could move in.

Dan L

I do but unfortunately it's a concrete drive...

It's vary rare to see an open trench or photos on new connections..

With 5-- 10 jobs a day ( bts and new connections) received that morning it's a fast paced industry built for the main purpose of making money.

Dan L

Thanks

Dan L

Your knowledge consistently impresses me.
Thanks

Dan L

An earth electrode was installed with in 100mm of gas cylinders. Note the cylinder and electrode was installed at same time. Between the gas man and electrician they decided a removable cap over the electode was acceptable, however I don't see how this makes a difference as when you need to test it ...

Dan L

This is very interesting and also just happened to me yesterday exact same situation. House has been livened for 6 weeks. However to throw a spanner in the works and add to this scenario the earth electrode was installed with in 100mm of gas cylinders. Note the cylinder and electrode was installed a...

Dan L

I thought that's exactly what 73 a 4 says about person connecting can rely in on coc and roi if they had not done the work? 73 a 4 "person who undertakes the connection of an installation or part installation is entitled (if acting in good faith) to rely on the veracity of any certificates of compli...

Dan L

If a coc is produced stating its done lawfully and it complies then I assume the person livening to network can rely in good faith on the coc and connect.? Of course along with coc and roi for new mains But I feel the person would be lieing in that coc making it a false declaration unless they do br...

Dan L

Old House relocated to new location. House most likely 70s. Pleanty of things that do not comply with current standards. Neutral bar on front switchboard and green MEC to name a couple. It's my understanding similar to relocating a switchboard to a new room. If an entire house was relocates It woukd...

Dan L

Thanks I really appreciate the feedback.

Dan L

On a commercial switchboard the MEN link (which was connected by lug not a screw type) was bolted onto the same stud as as another conductor on the earth and neutral connection. The other conductors where extensions to a second earth and neutral bar of the the same enclosure. To me this seemed wrong...

Dan L

Thanks good information

Dan L

What about main switch changed to a generator changeover switch is it the same deal. Main switch is just a replacement low risk and the rest of the work for generator supply is general.?

Dan L

Bit of a strange question but at which point does a ROI become active. Is it when the last peice of required Information is filled out as per esr 72 for example the signature Or when I give copy to electrician. Same for coc and ESC Reason I ask is for me I I prefer to fill out all my paperwork in th...

Dan L

Seems I'm wrong again but good to be learning. Thanks

Dan L

Interesting I thought it was more needed to see if the existing mains CCC is fit for the new increases capacity and if the EFLI is low enough to operate new short circuit protection with in 5s etc But maybe that obviously has to be done but its more responsible of person actually putting in the new ...

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