Search found 18 matches

by Chaz
Fri Jan 24, 2025 1:42 pm
Forum: Earthing and Bonding
Topic: Buried bare earth cables
Replies: 4
Views: 4813

Re: Buried bare earth cables

cheers Alec,

Yes, totally get it, I don't think anything in this case is "not safe", just more of a professional interest I suppose. One of those "why are things done like that questions.
by Chaz
Wed Jan 22, 2025 2:10 pm
Forum: Earthing and Bonding
Topic: Buried bare earth cables
Replies: 4
Views: 4813

Re: Buried bare earth cables

Cheers Alec, informative answer as always. I am at risk of delving too deep into this, an likely over complicating things. But I like to understand how thing drawn on paper are actually compliant. :x So basically if in it is a installation that needs to comply with 3000, a bare buried earth originat...
by Chaz
Tue Jan 21, 2025 11:38 am
Forum: Earthing and Bonding
Topic: Buried bare earth cables
Replies: 4
Views: 4813

Buried bare earth cables

Hi all, Quick question regarding buried earth grid cables (i.e under installation substations or customer owned tx's etc) or bare earth conductors around factory buildings with tee off's for structural earthing/bonding of steel structures and same applies to buried strip type electrodes in residenti...
by Chaz
Tue Oct 15, 2024 11:47 am
Forum: Standards and Legislation
Topic: ESR 25 (d) vs AS/NZS3000:2007 7.8.2.1
Replies: 3
Views: 13241

Re: ESR 25 (d) vs AS/NZS3000:2007 7.8.2.1

Hi, I know this is a bit of an old thread, but I was wondering the exact same question regard 3012. How many construction sites or inspectors are actually doing periodic assessments on construction sites? I can say I don't think I have ever seen one done. I assume it is up to the construction site o...
by Chaz
Mon Jun 24, 2024 8:18 pm
Forum: Selection and Installation of Wiring Systems
Topic: Conduit vs Flexible conduit
Replies: 3
Views: 19421

Re: Conduit vs Flexible conduit

Hahaha, great response.

Cheers Alec.
by Chaz
Fri Jun 21, 2024 3:00 pm
Forum: Selection and Installation of Wiring Systems
Topic: Conduit vs Flexible conduit
Replies: 3
Views: 19421

Conduit vs Flexible conduit

Hi all, basic question.

Cat A wiring system, "heavy duty insulating conduit", can heavy duty flex conduit be used?

I see there a few standards operating in parallel atm with regards to conduits etc.

But if labelled HD and compiles with AS/NZS2053 then no issue? IE Marley solar conduit?

Cheers
by Chaz
Thu Jun 06, 2024 8:38 pm
Forum: Standards and Legislation
Topic: PEW and appliances/ Fittings
Replies: 3
Views: 16446

Re: PEW and appliances/ Fittings

Hi Alec, Thanks for the reply - all makes sense up too '4 what standard should this be constructed to'? I guess where is that line for the SDoC? Using the example of the light above - If the one man band electrician makes up 1 light for a customer or 100 lights, technically he is selling them correc...
by Chaz
Thu Jun 06, 2024 11:56 am
Forum: Standards and Legislation
Topic: PEW and appliances/ Fittings
Replies: 3
Views: 16446

PEW and appliances/ Fittings

Hi team, I'll prefix this post that I'm feeling like I should know this but some reason I can't seem to comprehend it :lol:. Question sort of has two parts to it and originated from a job I was doing and was trying to see where it says you need to use 0.6/1Kv cable and I couldn't seem to find the in...
by Chaz
Tue Oct 17, 2023 8:14 pm
Forum: Standards and Legislation
Topic: Alternative to MEN in Mining operations - is it a part 1 solution?
Replies: 2
Views: 14828

Re: Alternative to MEN in Mining operations - is it a part 1 solution?

Hi Alec, Thanks for the reply. Yeah, it makes sense being Part 1. I suppose in practice its not so simple making the whole installation HRW due to being non-MEN, just for the fact that in mining the use of alternative earth system is common place and there are lots of additional standard to ensure s...
by Chaz
Mon Oct 16, 2023 8:54 pm
Forum: Standards and Legislation
Topic: Alternative to MEN in Mining operations - is it a part 1 solution?
Replies: 2
Views: 14828

Alternative to MEN in Mining operations - is it a part 1 solution?

Hi Guys, I have a question WRT alternative supply system to MEN (TNCS), in mining operation we often use the IT earth system. To be specific the current mine site the 11KV used on site is supplied via Isolation transformer (5.5MVA), the secondary side has a resistor connected between the star point ...
by Chaz
Wed May 19, 2021 11:05 am
Forum: Inspection
Topic: Buss tie changeover switch main switchboard
Replies: 6
Views: 31001

Re: Buss tie changeover switch main switchboard

Hey, Had this exact situation few months ago, but with three transformers, with three main switches, two bus ties between each "section" of the board all on to one switchboard. N + E bar common across all three boards, and it also had generator supply as well. Each incomer had a MEN link, meaning th...
by Chaz
Sat May 15, 2021 7:11 pm
Forum: Switchboards
Topic: Meterbox as BTS
Replies: 4
Views: 24611

Re: Meterbox as BTS

Hey just out of curiosity what's the clause for the use of single insulated wiring? Trying to find it.

3000 3.10.1.1 Exceptions says single insulation is ok or is it 3012?
by Chaz
Wed May 05, 2021 10:20 am
Forum: Selection and Installation of Wiring Systems
Topic: Old cable types
Replies: 4
Views: 14624

Re: Old cable types

Thanks Alec / Pete for the responses.

So same applies to VIR /TRS also as long as electrically safe?

However prudent to replace.
by Chaz
Tue May 04, 2021 9:17 pm
Forum: Selection and Installation of Wiring Systems
Topic: Old cable types
Replies: 4
Views: 14624

Old cable types

Hey Team, Was just a job the other day a saw some oldish TPS which was solid core 2.5mm primary insulation on the earth as well, not bare earth in sheath. What date did the standards prevented the uses of solid core cable other than 1mm? Just want to get a better upstanding of when types of cable we...
by Chaz
Fri Apr 30, 2021 10:02 am
Forum: General Electrical Discussions
Topic: VSD Cable - why multiple earths?
Replies: 4
Views: 24619

Re: VSD Cable - why multiple earths?

In a symmetrical earth design cable the earth conductors are located in the interces between the phase conductors. This ensures the distance between the phase conductors and earth is consistent. The resultant earth currents now cancel each other out minimizing the common mode current that can flow b...
by Chaz
Thu Oct 01, 2020 7:59 pm
Forum: Standards and Legislation
Topic: Commissioning
Replies: 1
Views: 3096

Commissioning

Evening all, The question is mainly directed at the industrial side of the house. Currently working on a large industrial construction job. The plant is of foreign design and they have sent over a large commissioning team from that country. What are everyone's thoughts or feelings and the legality o...
by Chaz
Mon May 25, 2020 11:52 pm
Forum: Data, Alarms, Security, & TV Distribution
Topic: ETP to OTP
Replies: 4
Views: 36470

ETP to OTP

What type of cable is everyone running between in a new build? Cat5e and fibre composite? Or are you just running duct? I have a long run in a new built to do, no access from etp to opt or data panel once lined. Bit of a mission running 20m of conduit through framing for chours too pull the cable, w...
by Chaz
Tue Apr 21, 2020 3:57 pm
Forum: Distribution, Networks & Metering
Topic: Network electrical connection standards - Auckland
Replies: 0
Views: 16266

Network electrical connection standards - Auckland

Hi all, Just doing some personal development in this period of down time. I don’t have much experience in dealing with residential network connections and/ or power providers so bear with me if the following seem like stupid questions. I am in the Auckland area and was looking into the vector connec...