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JamieP

I've never really thought or looked much into certified designs until now as I was asked the question of what makes something a certified design, I always thought this was something to do with Electrical Engineers and part 1 solutions but having a read of ESR58 this doesn't seem the case "A design f...

JamieP

Thanks Greg, I understand how to calculate the value and such but it's more if there are other things I need to consider as said due to not having dealt with them and also not fully understanding what's different, appreciate the input

JamieP

First time I've had to test circuits with motor circuit breakers and just curious how to calculate EC values for the circuit? Is it just a case of getting some manufacturers data and calculating for a 5s trip time? Or are they similar to standard circuit breakers and should I be aiming for the insta...

JamieP

Just in response to your last comment I agree replacing mains is low risk, or any other replacement for that matter but isn't such a task seems quite hard to complete due to the fact I'd think it's only replacement if it was the same length, same route etcetc, any changes in this would to me make it...

JamieP

Thank you, once again much appreciated

JamieP

I see this come up often No mains parallel Definitely a PV installation So the defining factor on being high risk is whether it's PEW or not, I see a lot of people agree if it's a ELV system then it's not PEW but just reading "are intended solely for connection to, or are associated solely with, ele...

JamieP

For a long time I've known when doing EC tests that a device with low ohms function should be used but I can't for the life of me find anything to back it up, can anyone point me in the right direction, I'm just wanting to explain to others that a general multimeter is not accurate enough for such t...

JamieP

I'd say low risk, you're replacing one fitting with another, sounds like replacement to me

JamieP

My comment for 6mm being suitable was based on 63A MCB used as over current protection, this because where I'm from we provide our own isolation before meter and also provide over current protection here in the for of an MCB Also assumed V90 cable, unenclosed in air Just to clear that up, apologises...

JamieP

As Doug said, it's not about length it's about different installation condition and is directly related to insulation temperature limits 6mm in those conditions is suitable for the current required and the reason it changes back to a larger size is because it's installation conditions change 3008 se...

JamieP

Thanks Pete, I have looked at them and also compared them to definitions in Regs and the Act, but sadly wasn't enough to clear it up for me but appreciate the input As for you Alec, so if it's not a vehicle, it can't be a connectable installation? Just thinking along the lines of sleepouts and cabin...

JamieP

Obviously in some situations it's quite obvious

But often I find situations when people try claim something is an appliance to avoid connectable installation rules

What is the best way to clearly separate the two in situations where it may not be so obvious?

JamieP

I think you've taken the right approach

A similar topic was just discussed recently

5.4.6.1 has all the information you need

JamieP

I was just going to make comments on the "not conductive building materials" but seems you've already cleared it up

I simply believe the only clause that applies to metal bench tops is 5.4.6.1 and that the trigger conditions for said earthing is , in simple terms lack of double insulation, as said

JamieP

Why is it I see so many people raving about analog insulation resistance testers? Why do those using them believe they are so superior and for what reason? Or are there any links or rescorces to read up on?

Appreciate any information

JamieP

Had a look into things and it does seem ducts still follow similar standards, except continuous ducts, from looking on the Marley website But regards everything still points towards an HD rating for Cat A and MD for Cat etcetc I have seen ducts on the Marley website that specify no duty rating so I ...

JamieP

That's not correct Socket outlets are not current limited sources, yes a single item plugged in with a 10A plug on it should never be able to draw more than this but due to the fact we have multiboards and other devices many multiples of devices can be plugged in causing far higher than 10A loads Th...

JamieP

First time working with cable duct and just got me curious Are they made to the same standard or different? Do they use the same rating systems and are they equal? Eg HD etc I've just noticed light duty and medium duty duct underground (both orange but I know color doesn't change anything, just addi...

JamieP

3.13.3 specifically says cables though

The first word is cables, it doesn't mention anything else on a catenary for those height restrictions

JamieP

Isn't the main issue that the people use conduit on a catenary to run at heights lower than those for cables suspended on a catenary? Cables follow for N/S heights of aerial conductors in accordance with 3.13.3 (a) giving 3 meters for areas not used by vehicles which is usually higher than most span...

JamieP

"In most cases signal cables are not "installation wiring"" Could you elaborate a bit more on this? I am new to the industrial game but most of the control cabling seems to be supplied via a 24V power supply with a 230V feed in Wouldn't this still be part of the installation? And installation wiring...

JamieP

First of all, welcome back Alec hah The reason for my question is trying to answer the question of DC colour usage and I totally understand that 3000 is very bias in this regard This springs from seeing green ,very common in control cables multicores and even green/yellow used in ELV DC systems The ...

JamieP

Would this definition also include DC + and - conductors? Because to me it seems so

JamieP

Yeah I'd go with what Doug said and go by the largest part

Or attempt calculation 5.3.3.1.3 and see what happens haha

JamieP

Screenshot_20210128-182721_Google PDF Viewer.jpg "For the purpose of access, all switchboards installed in transportable structures shall be treated as a main switchboard as specified in AS/NZS 3000." Would you consider this to mean that the switchboards must meet all the rules for main switchboard...

JamieP

Just further curious about this as we have been discussing it at work in regards to main switches needing to be readily accessable In our situation it's a MSB with doors directly in front (I guess essentially a cupboard) but said doors are always locked But in our discussion it got me thinking about...

JamieP

Apologise, I thought there would be something a bit more to the question haha

Both seem to indicate "connected load" so I'm not 100% but I'd say probably the rated amps as that's going to be a more usual value where as max will only be for short periods of time I'd assume

JamieP

Domestic - table C1 group D

Non-domestic - table C2 group C

JamieP

Do the MIs specifically say it needs a circuit to cover full load?

Or are the MIs just saying that the full load is 45A and not actually indicating any requirements to the installation circuit

JamieP

I noticed on most the documents they actually have the date of gazette on them, think it was right at the end of them because I used said date when needing to work out when certificate documents came into force as you said

JamieP

No stupid questions, sometimes nice to have someone else at least confirm your way of thinking

I see table 3.8 not complied with all the time, especially for outside cat wire set ups between buildings that are supposed to follow the N/S values

JamieP

My opinion would be yes, vehicles use the driveway, so it's used by vehicles

Think you're overthinking this one mate

JamieP

PeteRig, no question is stupid, see ESR75 (1)(b)

JamieP

May I ask what your usual routine of verifying a MES is?

I usually just visually check inside the switchboard and then test MEC from electrode

What is your procedure if unable to visually locate an electrode? Install a new one or an alternative test method?

JamieP

"(e) in the case of a low voltage installation or part installation, do all of the following: (i) ensure that the polarity and phase rotation of the supply are cor- rect: (ii) ensure that the protection of the supply is correctly rated: (iii) ensure that the installation or part installation to be c...

JamieP

Thanks again for such an in depth explanation

JamieP

Just a bit further of a comment on this You may set up a separate MEN installation in an outbuilding only, as you say, in accordance with 5.5.3.1 I always thought a separate MEN installation had to also be supplied from a MEN switchboard but I can't find anything to back this up For some reason I th...

JamieP

Yeah I do understand this, I more starting looking at it for my own personal reference and to help build my knowledge but just thought I would share incase it was of any use to anyone else

At least gives a brief look into things, appreciate the input

JamieP

Under Orion's network for Christchurch, you are required to provide overload protection for mains and also a isolation device before the meter Usually this is in the form of a 63A MCB in the meter enclosure before the meter and then the meter feeds off to the MSB and MS (din mount isolation switch) ...

JamieP

-*-Posted this elsewhere but would love to have some input, let me know if anything seems incorrect or is missed etc-*- History of 3000 Frequently people want to know what standard or regulations are worked to or were worked to at a certain time, I'm still going to work towards the Regulations but I...

JamieP

I'm looking at a new pair of bootlace crimpers and they have both a hex and square model

Just curious if one is more useful than the other or not? I'm moving into a industrial electrical role

Both are 0.14mm-10mm

Specially Weidmuller PZ 10 Hex and PZ 10 SQ

JamieP

There you go, I knew someone would have a better grasp on it than me hah Regardless of the SDoC though, the responsibility of electrical safety falls on the person who installs and certifys them so they would have to check and confirm what the need to to be satisfied which such, correct? Unless of c...

JamieP

Wouldn't the UK company be the importer? As by offering it for sale in NZ they are the one who is importing it into NZ and it would be there responsiblty to ensure the product they are selling has an SDoC is my thoughts This isn't something I'm super well versed in but just trying to offer some inpu...

JamieP

If it's a light fitting designed for domestic use then it's a DMRA Being a DMRA ESR 83 says (2) A declared medium risk article may not be sold, offered for sale, supplied, or offered for supply unless— (a) the supplier (being the New Zealand manufacturer or importer) has made a supplier declaration ...

JamieP

Possibly

What's the issue you have? I guess you'd have to be careful of parallel E/N paths as always but I can't see why you couldn't off the top of my head

Greg where do you get the notion of every submain needing a PEC in 2018? 5.5.3.1 (c) still allows the use of a PEN submain does it not?

JamieP

Interesting, but am I correct in ESR113 would allow me to connect both back together on the N bar in the new board as low risk? But only via a lug with a nut and lock nut as per original requirements? (Is that right? Correct me if I'm wrong) I personally wouldn't go down that route but just making s...

JamieP

I understand in most cases switchboard replacement is low risk I also know certain things can change this, like installation a MEN link when there original switchboard had a single bar for both N and E (although I'm also aware it could infact be kept this way in regards to ESR113 avoiding the high r...

JamieP

I've been asked a few times lately about whether I can swap these out for a standard socket outlet which got me thinking, is it acceptable to do so under ESR 59 (3) b because they are both socket outlets? Or must I comply with 59 (3) a and bring to current rules? Just wondering my obligations around...

JamieP

I have a client who has a range (gas top, electric oven) currently connected via a 15A S/O above the bench top. He wants it moved down, out of sight for a splash back and to keep it clean. It will still remain connected via S/O in one of the adjacent cupboard as is common for complying with 4.18 How...

JamieP

Good question, interesting read

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