electricalforum.nz

Registrations are turned off due to the 100+ spam requests each day, while I don't mind vetting each request for registration 2 undesirable things happen, 1 - a spammer gets approved and proceeds to post their rubbish and DM's, sometimes the email address they use looks genuine and gets approved, 2 ...

Normally closed contacts, when the test button is pressed 'K'' open these these 2 contacts and EM lights come on for testing, it looks like the R/H contact may be a misprint. looking at the clevertromics unit, it looks like it monitors several circuits and if you loose a circuit (breaker trips) then...

If the Electrician is sorting out the paperwork for the power retailer/metering they should eventually receive the ESC from the metering company via the retailer, quite often the construction company/builders take on this task. 1st question is, who arranged for the metering? then HCC should be direc...

IMO there it is vague around submains and earthing, Electricians and Inspectors tend to hold different views on this. I think what is needed either a clarification in law (.....yeah right we all know how slow the legislation changes move) or Worksafe/MBIE/EWRB issue a clarifying statement around the...

As someone who is a contractor to WEL networks I can tell you exactly how WEL want it to work. 1) WEL LM who does the network connection (they have a team that only does network connections) will only do so IF the building end is safe (WEL policy), this means service phase(s) terminated in to isolat...

I would imagine that the socket and plug both have clearly marked "N" on them. If some other device was plugged in, neutral return current would then flow through the PEC (via the screen connected to the 'N' pin on the socket), would the PEC be rated to carry the current?, quite common for the PEC t...

Hi impedance meters don't load up the circuit under test and so induced voltages, add a bit of load like a 100w filament light bulb and the voltage will be zero

I have been asked this by someone who works for a network company. Some facts before I ask the question. Facts:- 1) This is works not installation 2) Person X in question does not have an electrical background or any formal qualifications in the electrical area. 3) Person X has been deemed "competen...

the person does the final connection that will enable power to flow in to the installation should do the ESC, if you done the connection at the main switch BEFORE the connection at the pole fuse then the network company does it, but if the pole fuse connection was done FIRST before the main switch w...

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basically if you are going to switch the neutral this is how it must be

4 pole switch/circuit breaker, the clause in 3000 (see previous post) contains all the info

Action wrote: ↑
Wed Feb 08, 2023 11:19 am
Any idea when this will be cited? How can i find out, when it is citied is a notice put on the govt gazette page?

Don't hold your breath, legislators can't even cite 3000:2018 which was released 5 years ago......

depends if they are an endorsed LM or not, non endorsed only as far as the POE or where the mains enter UG in to the house, I don't think a endorsed LM can do *any* main earthing system work, looking at the EWRB info graphic, but can do the mains/mains entry box, main switch, internal mains

short answer no, the switched neutral must be arranged to switch substantially together with all active poles, or not switched at all

AS/NZS23000:2007
2.3.2.1.1 (b) (ii) (a)

good question, never really though about it, I've always used copper lugs and never had any problems, never seen galvanic corrosion on ladder. I guess you could use the connection paste to exclude oxygen from the bolted joint. Here is another question, what metal is the bolt made of - Steel? that's ...

no reason why not, but there may be discrimination issues with the RCD, use a 300mA or a S type with a 100ms delay

Hi Greg Please don't call me a dinosaur but how do you upload images for a post? What is the easiest way for multiple images? Thanks Start you new post (or reply) and it should be as simple as dragging the picture (or file) to the box you are typing the message or multiple files, scroll down a bit ...

This is posted on be-half of someone, --------------------------- Network company engages a contractor who does service pillar installs. As part of the QA process, the contractors engage one of their staff to visit completed jobs and do a QA audit, mostly things like pillar level, at the right heigh...

On my COC's I have "Supply System 230V/400V MEN"

You are protecting the cable and the socket with the circuit breaker, otherwise you can put whatever on the end. Remember the key words are "Electrically Safe"

I would suggest that they are both not double insulated as the TPS would be removed somewhere inside the flush box before the cable is terminated in to the switch.
Good practice is to not have two different voltages present in the same switch plate.

if supplying single phase circuits then no, but if supplying a 3 phase socket or machine then all 3 must be disconnected at the same time.

6A of the ESR's set out what is High risk, what is low risk and go on to say anything in between is General Risk. The work in question is not low risk, and would seem to not be high risk - So then it is general risk, regardless of haz. area it's installation of new conductors. If I was doing the wor...

Is it general or high risk prescribed electrical work, I would say yes so COC required

nope, just manufactures thinking they know better

Ultimately because of the way the ESR's are worded it's an legislative change to reference the new standards, so it would be worksfe and the EWRB pushing the minister to bring the changes before parliament for a law change. Common sense (yes I know this does not apply to politicians) would say, chan...

3760 - 1.1.6 this standard does not apply to fixed equipment...... so no to the hard wired gas dryer as far as the hair goes, possible yes, 1.2.3 talks about exclusions and cables that are not flexed in normal use, a hair dryer would be flexed and would seemed to be included, there is a nice diagram...

We have one of these for our linesman, they are basic are designed more for those that simply record a result without knowing if it's a good or bad result.

I would use it if there was nothing else, given a choice a reasonable MFT would be way better

no problem undergrounding 11kv or 33kv, but that is something your average electrician has never done - this is where your network company (or a contractor that works for them) should be involved. As far as cost, not a clue. Mostly this kind of thing is quoted per meter fully installed with differen...

Generally the retailer approves a company to install metering, usually they prefer Inspectors as quite often an Inspection of a new installation is required before metering is installed. So it's dependent on the retailer and who they "approve" to install meters. Quite often the meter installer also ...

Hi Dave, From the content of your message it appears you are not an electrician? There are a lot of factors that limit the distance, such as how many amps to you want available, type of cable, basically the limit is how much you want to spend! The Northpower HV could be 11KV or 33KV, there is no rea...

the person who does the last connection that allows electricity to flow thru the installation should be doing the ESC, in this case the meter installer, without the meter no flow of electricity. As far as the LM connecting the network end, as far WEL goes, if the other end is terminated in the meter...

Done lots of motors in the past, the only reasons for a low test would be moisture ingress or it been on the way to burnt out. 1/2 meg is too low right off the mark, 2.5 meg would be marginal at best. Even if used at 2.5meg I would expect a total failure in the near future if used. So yes a fair jud...

4.4.2.2 say use AS/NZS3000 for main earthing lead requirements.
The cables between the generator and the installation would be the mains for the purpose of working out the earthing requirements

This could be private works, I would be talking to the designer as you would seem to need a defined point where it changes from works to installation just so it's plain and clear to everyone and from there you can make the determination on how things are going to work. I'm not exactly sure but if th...

does each DC have it's own N&E busbars, an MEN link and an main earthing system?

Is each DC for exclusive use of an installation?

Who own the DC - the property owner? the network company?

You don't have to sign the electricians ESC portion of the COC, nothing wrong with issuing his own ESC

At the very least it's non-compliant, if the electrician has supplied a COC that says it it compliant the been on the prudent side the inspection should be failed as technically it is a false declaration. The argument could be that the gas stuff wasn't there when the meter board went in, it may be t...

I done this before, the transformer has to be for exclusive use of the installation, so no other customers off the transformer. You could install as MEN but keep in mind the transformer LV will have quite a large earth mat, way better than you could hope to achieve by putting in a earth pin. Keep th...

Just done one a few weeks back, failed really badly, last item on this list of repairs that I wanted to see done was a copy of COC from the electrician that does the repairs - I got a blank look from the customer.......(yes I knew dam well that the owner of the coffee cart was not an electrician and...

At then end of the day you need to ensure that the work you do will not lead to an electrically unsafe situation, buy fitting current limiting devices would be the way to go in lieu of bigger cables and DB's. Let the customer know in writing what they can expect - nuisance tripping and what will be ...

effectively the N/S cable using the screen as a phase would no longer be a N/S cable, table 3.5, this cable would now be classed as Insulated, unsheathed conductor so this cannot be buried direct and must be enclosed in conduit. Your right, it is bonkers, just a problem waiting to happen. If this is...

this is clearly general risk work, 6.0mm is not a like for like replacement 2.5mm, you are clearly uprating the circuit and this is not maintenance.

is the test done on a long length of cable? if not then the motor is no good, sounds like moisture that is evaporating slowly when IR tested, if it's on a long length of cable, it will be acting like a capacitor an charging up and holding the charge.

Typical works here (this will vary depending on you network rules) is to drop an earth pin and create a MEN point by putting the earth wire on the N-bar

Metering has no bearing on this, it is the definition of an installation, where main switchboard is defines the MEN point and the mains back to the point of supply which then defines which part of the installation is high risk work and requires inspection.

It sounds like you are looking for something like a certified design, other than that the how to do it is gained by on-job experience.

I guess this could be written up, but it would take many hours to get right and doubt that someone here would do it for free.

bit of difference between an E-Stop (category rated or not) and isolation, An E-Stop still does not meet all 6 requirements. E-stop style switches have easily removable contact blocks and have been known for the contact blocks to become easily dislodged, an E-Stop usually uses N/C contacts should th...

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