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AlecK

Good question.
The arrangement meets the definition of "main earthing system" in ESRs; so yes installing it is high-risk PEW and so requires inspection.

AlecK

Yes 2.5(g) sets a default of only supplying installation (or part) from genset via MSB; but immediately allows an Exception provided 2 conditions are met. As published (using "and"), both conditions must be met - making it completely pointless. Was supposed to be "or" - but no-one (including me) spo...

AlecK

It's still switching supply to load supplied from that DB between 2 sources; one being "normal supply" and the other being an "alternative supply". Physical location of the source selection device makes no difference to how the requirements apply, but will affect the detail of how you comply with th...

AlecK

There is no rule prohibiting connection of an alternative supply at a DB, to supply all / part of that DB's load. It is well-established practice for large installations with a centralised alternative supply to distribute that supply via (essential power" submains to those DBs that supply essential ...

AlecK

Given the dimensions, I reckon this thing is specifically intended for use with a spa pool- and is being sold as such. There's nothing else most peaople would want to fit roof & lights over, and louvres around. But likely not designed specifically around our NZ Zones. Or European Zones, which ours a...

AlecK

I agree the lights and the lead of this unit are in Z 1. So you should not install them. However the Wiring Rules apply only to the electrical installation; not to appliances plugged into it. What people do later is up them, and all we can do is advise. It's acceptable to install a GPO outside Z1 if...

AlecK

Item (v) arises only if taking option (B) of item (iv). Option B is that supply to the outbuilding DB is via one or more other DB that are in other outbuildings, and not direct from MSB. Noting that there is no valid option of supply via DBs in main building, only via DBs in other outbuildings. Keep...

AlecK

Whether it should be classed as low risk PEW is a very different question from whether it is classed as low risk PEW.
Exactly the same as for a mains entry box.

AlecK

On my opinion it's maintenance / repair / replacement;
not installation work/
No different from replacing a fitting.
Or a length of mains cable; which is also high risk when installing, but low risk when maintaining

AlecK

Why "2000" edition? this clause was never mandatory. The wording "open cooking surface" was added in A3, (2003), including examples of what is intended to be covered, as well as the not explaining examples not included. "open cooking surface" refers to the user's access to the hot bits. It's not abo...

AlecK

basically all electrical equipment is either a fitting or a collection / assembly of fittings. The 3 main types of such assemblies are "works" , "electrical installations", "appliances". All defined in Act as mutually exclusive. Demarcation between works & installation is 'point of supply"; generall...

AlecK

4836 does not deal on electrical worker vs non-electrical worker. It deals with managing the risks of work - whether that's electrical work or anything else - either in or near LV /ELV installations & equipment. And while it deals in competence generally; it doesn't get into specific qualifications ...

AlecK

Short answer: this config is non-compliant If installing PEN submain i.a.w. 5.5.3.1 (b), item (iv) says the submain can come either(A) from MSB, or (B) via intermediate DB(s) . If using (B), then (v) kicks in, and integrity of the PEN must not depend on any connections to terminals in the intermedia...

AlecK

The key is in the definitions in "3000": 1.4.52 Electrical installation 1.4.53 ditto domestic 1.4.54 ditto multiple 1.5.55 ditto residential ICPs are a management tool, but they do not in any way define whether this is one installation or two. Nor does the metering arrangement. Assuming it's correct...

AlecK

1 Yes, an "MEN switchboard as defined in ESR 4 must be connected to an earth electrode. 2 3000 doers not permit more than 1 MEN swbd within same installation; except for an outbuilding. so correct can have a freestanding pedestal (as outbuilding), but not a "EV swbd" mounted in / on same building as...

AlecK

A freestanding pedestal type structure would conform to definition of "outbuilding". And in a non-residential installation, - the Guideline requirement to take supply from an MEN swbd would apply; but - the Clause 7.9 prohibition on supply from an outbuilding would not apply. So if arranged with PEN...

AlecK

I suspect I am the source of the answer being quoted here Perfectly possible to have an EV charging station that includes a switchboard. And yes there could be good afr doing so, especially in a commercial environment. In that context; we need to look at what the applicable documents has to say abou...

AlecK

Have had someone ask how to get registered onto the Forum.
And couldn't answer, unless it lies behind the "login" system?

AlecK

Pete is correct; it's not "mains work" so not something we can properly use s reason to issue "fail" RoI ie one that states the high-risk PEW we inspected has not been done "i.a.w the regulations and / or will not be electrically safe when connected. Remembering that it's not a case of refusing to i...

AlecK

You are looking in the right place. Within the def for "installation" there are two options; installations with point of supply and installations without. This example is in the "with PoS" part. Meaning that the installations starts at the PoS... so off to that definition Which depends -, in part, b...

AlecK

True the fact that ESR 75 applies to the owner of the installation, so for construction wiring, that will be the builder; the PAs often just don't get done.
So errors / faults don't get picked up by the assessor

AlecK

Why would it comply with 2021 edition?
ESRs cite 2012 edition +A1 +A2 ; with one further change in the citation.

Nothing to prohibit following a later edition, provided it complies with cited edition.

AlecK

1 Correct such an assembly of fittings is "works", "not an electrical installation" Both terms being defined in Electricity Act, and are mutually exclusive. There is some apparent (but not legal) crossover; as installations can include generation; and generating stations typically include consuming ...

AlecK

I don't think so.
There's a considerable difference in risk between a wall limiting a Zone, and a ceiling limiting a Zone.
Water seldom falls upwards, and splash seldom reaches the ceiling
(even when the ceiling is low enough to replace the default height measurement as limit of Zone).

AlecK

Correct that if there is no provision for external supply, it's not a "connectable installation". So not required to comply with "3001" by ESR 60(1). Can comply, but not required to. Correct that 4509.1 requires an earth electrode - even if the only real function of it is to avoid the unit being blo...

AlecK

Agree with Doug on pretty much all his points. But to me the question isn't really about effectiveness of the electrode; it's more compliance with the requirement. Which is "effective contact with moist soil" - and that is always going to be a subjective rather than an objective assessment. Looking ...

AlecK

Agree it doesn't happen often that anyone bothers to arrange an independent, temporary, supply for testing.. Most times it's easier to wait, and do these tests after initial connection to (grid) supply). Technically that would count as "connection-for-testing"; and - provided all test results are sa...

AlecK

There is NO requirement for any test results to be included on a CoC. The regulatory requirement is that testing - as per "3000" must be done (by someone) prior to connection. Note here's also NO requirement that the person who did PEW must do the testing. Nor issue the CoC. These things must be don...

AlecK

In my opinion concrete cannot be considered a covering that maintains moist soil . Concrete may be slightly porous, but not very. Note it's used to make water tanks, also boats. True they put in additives to make it even less porous for those jobs. For sunken basements they paint it with special pai...

AlecK

Agree they are n/c contacts. But (being pedantic) when test button is pressed, they will not be opening, but closing (else the E-lights would be switched 'off" instead of "on") The convention for schematic drawings is that "normal" means de-energised; rather than whatever state may be perceived as n...

AlecK

There is currently no requirement for "3112" sockets to have shutters. I believe there are specifications that must be met IF shutters are provided. It's not an NZ vs Oz thing; it's a safety-conscious vs cheapest product thing. There was a move some time ago to try to mandate use of shutters (or equ...

AlecK

Certification (& inspection)is only required for general / high-risk PEW "on an installation".
ESCs a bit different; also needed for connection to supply done at supply fuse.

Check the wording in the relevant ESRs

AlecK

Inspection is required for mains work done on an installation by an installer. Provision of short circuit protection and fault protection for mains is not part of that, because ESR 32 makes it the responsibility of the lines company. Accordingly, these are not matters we need to look at when inspect...

AlecK

Not sure what would result from a different inverter being found if audited.
But should not reflect back on you.

I suspect few others wool be recording this info on their RoI.
If anything, the fact that you've re4corded this (non-required?) info would tend to confirm that a swap had been done.

AlecK

Under ESR 6A (1) replacement of fittings is low-risk PEW.
So no CoV required.
And therefore cannot be high-risk PEW, so no inspection required either.

AlecK

Remember 2022 edition has not yet been cited by ESRs. Until that changes, 1.5 is compliant with 16 A overcurrent protection. Note also that even when this clause does come into force, it will only apply to the installation of the wiring; not to issuing a WoEF for an existing unit. Assuming the citat...

AlecK

Correct that RCD protection is required for all final subcircuits. The usual, and accepted, way to use an isolated-output inverter as alt supply for a caravan (or part of one) is to fed it into ma change-over switch (make B4 break, 460V rated). Correct that circuits on separated supplies must have p...

AlecK

Yes, you are correct; both PV (at LV) and MPG are high risk. I should have known. And should have checked. Why they have picked the MPG and not the PV for this set of changes is unknown. Even stranger is that they have decided to distinguish between PEW in a cardiac-protected area and other medical ...

AlecK

The thing about a "PV installation" is that in most cases it not just a PV installation. PV by itself is not classified as high-risk PEW. You can do whatever on the array; and it's either not PEW (for ELV) or general PEW (for LV arrays). The part that's high-risk is the mains-parallel inverter. Note...

AlecK

Some people think that orange"high impact" conduit is HD.
It's not.
It's classified as MD, albeit having more impact resistance than the grey version.
It is intended for u/g use; and has less UV resistance than the grey.
When used above ground & exposed to sunlight, it breaks down and becomes brittle.

AlecK

1 Why did they choose Mains Parallel Generation? Because it's classified as high-risk PEW in ESR 6A. whereas PV is not. 2 if you miss out on the Grand-parenting of an Endorsement, what other avenues are there to gain these Endorsements so far, nothing. And not likely to be anytime soon, because EWRB...

AlecK

"Heavy duty" and 'flexible" are two completely different aspects
some conduit is HD.
some conduit is flexible.
Some is both.
And some is neither

AlecK

There are a number of errors and omissions, some minor and others more serious. The methodology described in this Guide depends on an "Installation SDoC", which appears to be mandatory. However there appears to be n Regulation or Gazette notice to provide the mandate. And while the guidance correctl...

AlecK

Thanks for posting that.
I knew there was something coming on this.

AlecK

remember SDoCs are only needed IF the item is a DMRA. I don't believe this would fit in any DMRA category. DMRAs are generally household type items. can spend a lot of time in the rabbit-hole of finding relevant product Standards. Probably wasted time. bottom line is: if it's done right, no-one gets...

AlecK

1 assembly of fittings Correct that this newly-assembled plug-in equipment is not part of an installation. Installation is defined in the Act; it starts at "point of supply", and excludes any appliances (regardless of whether plugged in or directly connected) Most - but not all assemblies of fitting...

AlecK

It's not about what the charger manufacturer calls for; it's about what Worksafe and NZ Standards call for So - regardless of what the charger manufacturer may say (apparently , for Tesla,different things at different times) ; you should be following Clause 7.9 of "3000" (2018 edition) and the Works...

AlecK

1st 2 copies of any CoC, RoI, or ESC go to a) the person whom asked for work to be done; and b) the person who issued the cert (who has to keep a copy for 7 years). A number of other 'entities' are entitled to request a copy; including the TLA. They have to make their request to the issuer. For a Co...

AlecK

You are not wrong. and (surprise surprise!) EWRB is. As is the meter provider. It's not possible to limit an ESC; it automatically applies to everything that gets connected by the action of connecting. If this is the company i think it is; they have a long history of trying to minimise their liabili...

AlecK

it may be non-compliant 9with a non-mandatory Standard); but there's no way it can be called unsafe.
In fact ESR 25 says that as long as it complies with the cited version it is electrically safe!

Clearly Worksafe has at least one idiot in it's employ.

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