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JamieP

If setting up the temporary MEN and electrode when on generator supply. Do you believe this constitutes a main earthing system and in turn becomes high risk PEW?

JamieP

I see 2.5 (g) but I guess that is referring to when the generator is supplying the whole installation? In this case it's supplying a part installation do not relevant? The main part I'm struggling to wrap my head around is your comment around needing to bring in it's own MEN/electrode. If a 3 pole/4...

JamieP

Hey Alec, I will have a proper read but just to not this situation the genset isn't connected directly to the DB the proposal is to have an intermediate change over switch mounted on the wall between both switchboard but not directly run to either incase that changes anything. So it's just an indepe...

JamieP

Proposed is to mount a changeover switch on a wall in a switchroom. The generator inlet would connect to this. The change over switches supply from a normal supply submain to the generator and then feeds a subboard. 4c+e normal supply, 4c+e from generator inlet and 4c+e to DB Can this be done compli...

JamieP

I've been approached regarding inspection of a new solar farm. I've been trying to work through what actually needs to happen in terms of law or if its just a cause of using smaller scale infomation as guidance. First thing I can't establish if something like this thats generation is part or works o...

JamieP

Sorry, I should have specified although I used a T6 voltage measurements were taken with the two leads attached and not via the clamp thing.

But appreciate the info Alec

JamieP

Ah, in this case I used a Fluke T6

It wasn't mine but a coleuges

JamieP

Well, I would assume so, yes, under breaking the drive with back feed and power anything simultaneously with grid power

JamieP

Very weird.

Downstream was 6 socket outlets, nothing plugged in. 2 general purpose, 4 for lights

Upstream was inlet. This was in two identical transportable installations.

JamieP

When testing RCDs I am pressing the test button. I confirm 230V on line side A and N I confirm 0V on load side A and N I confirm 0V on load side A and line side N But I am getting 180V when testing line side A and load side N Shouldn't this be 0V as well? Is this caused by internal components? EC te...

JamieP

https://dynesystems.com/products/drives ... r%20source.

Do drives with a "regenerative" function count as mains parallel generation, and if so require inspection?

JamieP

Part of me thinks this poor guy is being made an example for the rest of us to sharpen our processes Disagree, this "poor guy" killed someone due to his incompetence and by not doing absolute basics. It shouldn't be a case of upping our game as the bar should not be so damn low. I can't believe a l...

JamieP

Yeah good point.

Is it PEW under Schedule 1 of ESRS is probably the main question.

Does it meet the exception for being a supply not exceeding ELV?

JamieP

What about 2.1.4.2? "Each PV array shall have a switch-disconnector to provide isolation of the inverter. The provisions of multiple switch-disconnectors in Clause 4.4.1.3 applies and a warning sign as required in Clause 5.5.2 shall be provided." Or does having a shared one still consitute each arra...

JamieP

I just talked to Glen Morris yesturday about this who is a member of EL-042

I didn't get clarification on whether this was the case still in 2012 but he did say that conduit wire, provided it is stranded is suitible for PV array earthing or bonding as per 5033.

JamieP

All that really matters is what's likely to cause damage? A person walking in it, HD conduit is probably fine A car driving over it, HD conduit probably not fine There is guidance on suitable WSX ratings based on likely risk in the appendixs of 3000 that can be helpful. Just make sure the mechanical...

JamieP

Also a question I've wondered. Know that each MPPT connection is deemed a separate array and that each array requires one. Question is is one device for two arrays suitable as you're asking and I don't have a definitive answer. I advise clients for one for each array as I'd rather be on the safe sid...

JamieP

The UV suitability is also interesting because 3000 only really deals with direct sunlight in 3.2. Where as other parts of 5033 discuss reflected UV in terms of cable supports and not using plastic ties Maybe I need to drop my expectations to any stranded cable and only needing UV protection (which ...

JamieP

Rehashing this as it's driving me mad. I'm receiving a lot of push back on the fact I've been asking for the earth cables to be flexible and UV rated. Apparently according to multiple Inspectors and Electricians both AU and NZ seem to deem this over the top and a standard stranded conduit wire is su...

JamieP

Thanks Alec

Just for your reference and understanding.

https://www.energysage.com/energy-stora ... d-to-know/

There are multiple web pages with info on this. It's a common term in this industry.

JamieP

In this case they connect via a plug in conncetor. I guess maybe it could change if they are AC coupled or DC coupled? I was just asked the question by a client when doing a PV inspection if they would need an inspection of the batteries if installed at a later date. Initial thought was no in this c...

JamieP

Do batteries connected to an inverter fall under mains parallel generation? Or is it simply switchboard through to PCE high risk, PV install high risk, batteries general risk?

JamieP

Is an SDoC worth anything if it's not for a DMRA? Anyhow compliance with 6116 doesn't meet ESR 83 (3)(b) and isnt 6116 an installation standard rather than a product standard. I thought this was the point in Schedule 2 vs Schedule 4 Shouldn't items not medium or high risk articles have certificates ...

JamieP

I have been asked to do an inspection on a soon to be installed animal stunning unit. I have asked the following "Can I be provided with all manufacturers information as per 1.6 of NZS 6116 “(b) A copy of the manufacturers or supplier’s documentation for the appliance which should contain: (i) A lis...

JamieP

There will still be mains work, as you'll be working on the fittings that meet the description but provided the mains work parts are maintained or replacement then they fall under low risk. Mains and MEC can also be extended as low risk to facilitate such replacement. I only believe it becomes high ...

JamieP

Does 7.3.6 Earthing prohibit the use of isolated supply above 25kVA? Based on the exception? or is this just in relation to connections to an installation?

JamieP

So essentially all that really needs to be considered is I have 2 socket outlets that are part of the genset and the only real consideration is do I set the genset up as an isolated output or an RCD protected output I did look at the guidance on feeding single loads but was unsure if that still appl...

JamieP

Posting on behalf as I don't have an answer. The two socket outlets feed a 125A lifeguard unit with multiple RCBOs and a skid set up for the client. Unsure if the 125A skin counts as a big appliance or connectable installation. Also unsure if this makes any difference. "I've got a question about a s...

JamieP

Just a side note isn't stuff like this why 1.5.11.4 exists?

JamieP

On the right track then I guess. Connection was made by others and a COC and ESC provided for this portion of the installation. To me, it's certified and someone has already decided that whatever lack of proof of what it complies with was good enough for them to connect (although most likely didn't ...

JamieP

I have a site that has motors controlled via VFD. The motors are run in suitable VFD cable. The client wants the motors to connect via plug and socket arrangement. Rather than a 3+E socket they want to use a 3+N+E but want to use the N pin to continue the screen through. I don't like this at all, I ...

JamieP

I have been asked to certify a conveyor system from an OEM manufacturer. It consists of control panels, motors, sensors etcetc and is for picking goods for pharmacutical purposes. A feed from a DB has already been connected and certified to the main control cabinet. I believe installation wiring end...

JamieP

"Electrode circuits for Class A, B and C stunning and stimulating equipment not protected by barriers shall be supplied from an isolating class transformer complying with AS/NZS 61558.2.4 with no direct earth reference unless specifically allowed in section 3." I can't see any allowance in section 3...

JamieP

No worries Alec, take care and thanks for all the help as always.

Hopefully you do get a chance at some point, even if it's a wee while a way as I'm struggling to navigate what I actually need between ESRs and NZS 6116.

JamieP

Basically the purpose of my question is I'm just trying to work through want certification would need to be required when a company wants to install a new piece of animal stunning or meat conditioning equipment. ESR 80 says it needs to be electrically safe and is deemed electrically safe if it compl...

JamieP

So an industrial animal stunner that will never be in a domestic purpose isn't included? So certification to this wouldn't stand?

I just got thrown off as the scope of that IEC standard made it seem like industrial equipment would still be included.

JamieP

If a schedule 4 standard, such as "Electrical animal-stunning equipment - Standard A, or standard B, in conjunction with IEC 60335-2-87 Ed 2.2" If a piece of equipment/appliance has certification for this, is still suitible for an industrial situation? What does the Household and similar electrical ...

JamieP

Opening a cabinet, even with a tool or not is not PEW. Can't see anything in Schedule 1 of ESRS that would make it so.

I'd say they are fine as they are not doing PEW and are also taking the appropriate precautions.

JamieP

PEW on PV systems is high risk PEW. This requires inspection to confirm it complys with it complies with 3000 and 5033. (Unless part 1 design) Do we need to ensure all of 5033 is complied with? Do we need to confirm the mounting etc has its suitible certificates and installation? Or is it just the P...

JamieP

3.1.1 Except as provided for in 3.1.2 or under the relevant requirements specified in 3.7.4, no animal or carcass shall be worked on by persons while electricity is applied. So to me there are 2 situations only anyone can work on an animal while electricity is applied. 3.1.2 Protection against direc...

JamieP

Side note but 4777 has labeling requirements for the board you connect to, any intermediate boards and the main switchboard if you connect elsewhere from the main switchboard.

JamieP

Is it a mistake that green alone is allowed for insulated MEN connection's?

Or is there a specific reason?

JamieP

Ah, after a few reads and a good look over the standard I think I understand what you are saying. So 3.1.2 says if Class A and in a EQB zone the protection against direct contact is not necessary (but references 3.1.1? 3.1.1 talks about working on animals/carcass not direct contact, another mistake?...

JamieP

My opinion is not high risk. There is no mains work happening. He wouldn't be able to supply a CoC until the house was placed in the location it is going but location is part of the CoC. He should do it once he knows the thought but the obligation all lies on the person who connects to ensure that h...

JamieP

But quarrying operations and alluvial mining operations don't require a mining endorsement to work as an electrician. It's only mining operations and the above two are not mining operations. All are defined in the HSWA 2015 under Shedule 3. Hence why I'm wondering if a competent non-mining endorsed ...

JamieP

Who is authorised to inspect mining electrical equipment? I can't find anything clear in the limits of work. I know the obvious answer is a mining endorsed inspector and by all means probably the best person for the job but in terms of Regulations could a standard inspect do this for a quarrying ope...

JamieP

I am frequently seeing appliances in this field complying with 3.2.4.1 due to the exception for "larger openings are essential for proper functioning of appliances" which I have no problem with as the nature of these appliances we know barriers just wouldn't work. However, what I am finding also is ...

JamieP

Sorry to rehash this but I'm still trying to get my head around it As the standard says, 2 options for indirect protection Isolating transformer or bonding network To put what you're saying simply, am I correct in saying then if the transformer is an isolating transformer I can complete omit the eqb...

JamieP

So, I see regulations required these as "Safety Checks" under the 1993 and 1997 Regulations, R39 and 46 respectively but this was taken off as an item requiring Periodic Assessment when the 2010 Regulations came into play so interestingly enough as others have noted, no longer a requirement under NZ...

JamieP

The whole of 3.4 seems to apply to every appliance? I see 3.1.5 (b) specifically mentions it but nothing in 3.4 says it doesn't have to happen if an isolated supply What about 3.4.4? That indicates regardless of what appliance type or how it's supplied that every piece of exposed metal work must be ...

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