Search found 33 matches

by ShaneR
Sat Apr 20, 2024 6:44 pm
Forum: General Electrical Discussions
Topic: NOISY CONTACTOR
Replies: 0
Views: 2565

NOISY CONTACTOR

Hi all

When does a Noisy contactor need replacing?

Is there a point where it becomes a safety issue?

https://www.rowse.co.uk/blog/post/how-t ... -contactor
by ShaneR
Sun Feb 25, 2024 6:25 pm
Forum: General Electrical Discussions
Topic: Nelson electrician Stephen Burton’s failure to carry out ‘simple task’ linked to death of builder Craig Johnston
Replies: 13
Views: 15066

Re: Nelson electrician Stephen Burton’s failure to carry out ‘simple task’ linked to death of builder Craig Johnston

Lessons there for all of us. A good example of the 'swiss cheese" theory of how things go wrong First an error of assumption about what was there, followed by failing to test to confirm / reject that assumption; followed by non-compliant work; followed by failure to fully test. I to took all 4 of t...
by ShaneR
Tue Nov 14, 2023 8:45 pm
Forum: General Electrical Discussions
Topic: Nelson electrician Stephen Burton’s failure to carry out ‘simple task’ linked to death of builder Craig Johnston
Replies: 13
Views: 15066

Re: Nelson electrician Stephen Burton’s failure to carry out ‘simple task’ linked to death of builder Craig Johnston

I’m guessing a bit here, it’s difficult to fully understand the details from this article, but to me it sounds like he replaced a fixed wired appliance with a socket outlet. The cable at the range hood was a 2C+e. The red and green are both active (red permanently active, green switched), black is ...
by ShaneR
Mon Nov 13, 2023 10:21 pm
Forum: General Electrical Discussions
Topic: Nelson electrician Stephen Burton’s failure to carry out ‘simple task’ linked to death of builder Craig Johnston
Replies: 13
Views: 15066

Nelson electrician Stephen Burton’s failure to carry out ‘simple task’ linked to death of builder Craig Johnston

Hi all An interesting read https://www.nzherald.co.nz/nz/nelson-electrician-stephen-burtons-failure-to-carry-out-simple-task-linked-to-death-of-builder-craig-johnston/FPM5HK5DVNHNDNRWASXMBV56XA/ Some of the story didn't make sense to me Was the rangehood hardwired or plugged? Judge David Ruth said t...
by ShaneR
Fri Jul 07, 2023 9:00 pm
Forum: Selection and Installation of Wiring Systems
Topic: Duct vs Conduit
Replies: 6
Views: 8246

Re: Duct vs Conduit

It was just the Marley Maxi or something like that. The product has AS/NZS standard 5xxx can't remember the number, but that is good enough for me. Overthinking the problem :) I'm using a surface mount in a shed. I'm going from a "Meterboard" to "Switchboard" (they are really close) and I was wonder...
by ShaneR
Thu Jul 06, 2023 10:15 am
Forum: Selection and Installation of Wiring Systems
Topic: Duct vs Conduit
Replies: 6
Views: 8246

Re: Duct vs Conduit

Im using an older version of 3000:2007

3.10.2.1 (d) Talks about the use of tools

.....readily accessible position shall not be removed without the use of a tool
by ShaneR
Thu Jul 06, 2023 10:06 am
Forum: Selection and Installation of Wiring Systems
Topic: Duct vs Conduit
Replies: 6
Views: 8246

Re: Duct vs Conduit

Thank you Alec I hadn't thought about that. I trained in a time before standards (ECP's) and it's a different mindset. When I was an apprentice I was told as a rule of thumb unsheathed cables need to be protected by an enclosure that required the use of a tool or key to access. Using that mindset a ...
by ShaneR
Tue Jul 04, 2023 11:56 am
Forum: Selection and Installation of Wiring Systems
Topic: Duct vs Conduit
Replies: 6
Views: 8246

Duct vs Conduit

Hi all Can "Conduit wire" be installed in "Square lid Clip on Duct" without additional protection (TPS vs single insulation)? Just wondering if "Square lid Clip on Duct" and "Pipe Conduit" are considered the same level of protection. I was always taught the use of a tool to access cables was require...
by ShaneR
Thu Apr 06, 2023 1:45 pm
Forum: Generators and Solar
Topic: generator supply in an emergency
Replies: 4
Views: 7015

Re: generator supply in an emergency

If the generator does not have an RCD is removing the main link still safer?
by ShaneR
Wed Apr 05, 2023 7:44 am
Forum: Generators and Solar
Topic: generator supply in an emergency
Replies: 4
Views: 7015

Re: generator supply in an emergency

The maximum demand of the electrical installation must not exceed the maximum rating of the generator. All the generating devices I have used have a built-in protection device to stop overload. The cowshed maximum demand was bigger than the generater but it was managed via a selection of required c...
by ShaneR
Wed Apr 05, 2023 7:39 am
Forum: Generators and Solar
Topic: generator supply in an emergency
Replies: 4
Views: 7015

Re: generator supply in an emergency

If the generator is for larger three phase connections, an electrical engineer or inspector must be used to provide a design for this supply configuration.
So if I find an inspector......

What will be in this design?

Does somebody have a template?
by ShaneR
Tue Apr 04, 2023 4:44 pm
Forum: Generators and Solar
Topic: generator supply in an emergency
Replies: 4
Views: 7015

Re: generator supply in an emergency

Yes, I had some of the same questions We have a couple of big Tractor PTO Generators for cowshed supply when the power is out. The generator came with an RCD. Many years ago I removed the RCD because the cowshed leaks power like a sieve. It's the 30mA that is the problem. 30mA a whole installation i...
by ShaneR
Wed May 05, 2021 1:47 pm
Forum: Standards and Legislation
Topic: Business Update - May 2021
Replies: 0
Views: 4704

Business Update - May 2021

Business Update - May 2021 The Ministry of Business, Innovation, and Employment has just launched consultation on a series of proposed updates to standards referenced in in the Electricity (Safety) Regulations 2010 and the Gas (Safety and Measurement) Regulations 2010. We are letting interested par...
by ShaneR
Tue Jun 16, 2020 10:07 pm
Forum: Selection and Installation of Wiring Systems
Topic: Copper tails for aluminium sub mains
Replies: 5
Views: 4931

Re: Copper tails for aluminium sub mains

The tails I use are copper flexibles
Can you get flexables rated for buried direct?
by ShaneR
Tue Jun 16, 2020 2:53 pm
Forum: Selection and Installation of Wiring Systems
Topic: Copper tails for aluminium sub mains
Replies: 5
Views: 4931

Copper tails for aluminium sub mains

Hi all

What are the rules around copper tails, length and size reduction for joining to aluminum?

I'm going to run some 95mm Aluminium 390m underground.

I would like to add tails 5 - 10 meters on each end.

Never put tails on before.
by ShaneR
Mon Jun 15, 2020 11:19 am
Forum: Selection and Installation of Wiring Systems
Topic: Farm pump - underground power supply cable type
Replies: 3
Views: 2934

Re: Farm pump - underground power supply cable type

Not to save the cost of the PEC; but because you want the earthed equipment at this remote part of the installation to be at similar potential to the ground at that location.
Interesting

I thought supply via RCD would have been a greater safety factor
by ShaneR
Mon Jun 15, 2020 10:12 am
Forum: Selection and Installation of Wiring Systems
Topic: Farm pump - underground power supply cable type
Replies: 3
Views: 2934

Farm pump - underground power supply cable type

Hi all Cable type selection question I'm looking at running a 500m cable underground to a farm water pump station. (Pump (4 amps) + Lights + GPO) My plan was to run 4 core Neutral screen 95mm AL but have discovered that is not a common cable. I don't trust the farmer not to cut the cable via Mole pl...
by ShaneR
Sun May 31, 2020 10:44 am
Forum: Earthing and Bonding
Topic: MEN Switchboards
Replies: 6
Views: 7475

Re: MEN Switchboards

AS/NZS 3000:2007
5.5.3.1 Earthing requirements would be a limiting factor

5.5.3.1 (B) (iv)
by ShaneR
Mon May 25, 2020 9:07 pm
Forum: Transportable Installations
Topic: DR AS/NZS 3001.1:2020
Replies: 4
Views: 4785

Re: DR AS/NZS 3001.1:2020

umm

More than one supply point at my bach (tick) 3001 applys

Image

but my bach is also a domestic installation

Image

Is this an error?
by ShaneR
Mon May 25, 2020 7:59 am
Forum: Transportable Installations
Topic: DR AS/NZS 3001.1:2020
Replies: 4
Views: 4785

DR AS/NZS 3001.1:2020

Hi all

The new draft DR AS/NZS 3001.1:2020 is out.
https://shop.standards.govt.nz/docserv/ ... 1_2020.pdf


I notice big changes around "scope"

1.1.3 (a) Domestic installations.


Does this mean if my bach has 8 caravan points that its excluded from 3001
by ShaneR
Wed May 20, 2020 8:24 am
Forum: Switchboards
Topic: Single core cable entry into metal enclosure
Replies: 7
Views: 5320

Re: Single core cable entry into metal enclosure

Sarmajor wrote:
Tue May 19, 2020 6:30 pm
There is no logical electrical reason to trefoil single core N/S cables. The magnetic fields of these currents are cancelled by the neutral screen.
Have a look at 3.9.10.3
by ShaneR
Mon May 18, 2020 4:41 pm
Forum: Switchboards
Topic: Single core cable entry into metal enclosure
Replies: 7
Views: 5320

Re: Single core cable entry into metal enclosure

Thanks for that

I had a read, I didn't know that the slot width is proportional to cable size (20%).

Question: Does single TPS cable(s) need to be run in trefoil?

Looks like single core neutral screen does
by ShaneR
Mon May 18, 2020 1:51 pm
Forum: Switchboards
Topic: Single core cable entry into metal enclosure
Replies: 7
Views: 5320

Single core cable entry into metal enclosure

Hi all

When single core power cable(s) would enter into a metal enclosure we used cut a square hole and cover it with a large aluminium plate then drill holes through that.

Its this still a requirement?

Does it make any difference?

Thanks
by ShaneR
Thu Apr 23, 2020 10:11 pm
Forum: Request a new Forum here
Topic: General Forum Discussions
Replies: 7
Views: 21201

Re: General Forum Discussions

Mazdaman wrote:
Thu Apr 23, 2020 6:41 pm
Can we have a rule please to not copy (quote) the most recent post?
What!

Quoting is the best feature :)

I was going to suggest regulations in "code" </>

Code: Select all

ESR 1.2.3 One rule for them all
These things have a way working themselves out without having to create rules in my opinion
by ShaneR
Thu Apr 23, 2020 12:50 pm
Forum: Switchboards
Topic: Circuit Identification
Replies: 20
Views: 15821

Re: Circuit Identification

I work better with pictures

So what doesn't need to be labelled/identified

Image
by ShaneR
Thu Apr 23, 2020 8:00 am
Forum: Off Topic/General Electrical Discussions
Topic: www.electricalforum.co.nz - Master electricians
Replies: 3
Views: 8462

www.electricalforum.co.nz - Master electricians

Hi all I wonder how much "Master electricians" paid for the domain? The asking price from memory was about $3000 Time will tell but I think It was a mis-step going to facebook. I think giving and receiving information anonymously was an important feature. Also phpbb gives us a tree structure plus ma...
by ShaneR
Thu Apr 23, 2020 7:48 am
Forum: Request a new Forum here
Topic: General Forum Discussions
Replies: 7
Views: 21201

Re: General Forum Discussions

AngryClient wrote:
Wed Apr 22, 2020 10:03 pm
ShaneR wrote:
Wed Apr 22, 2020 8:22 pm
"Off topic" section I would assume is anything not electrical?
I assumed that was the DIY section?
:) I didn't want to go there
by ShaneR
Wed Apr 22, 2020 8:25 pm
Forum: Off Topic/General Electrical Discussions
Topic: +1 or Thanks button
Replies: 2
Views: 7087

+1 or Thanks button

Hi Admin

Can we get a "+1 or Thanks button" for threads

Many people don't want to comment but but would like to say thanks

Thanks
by ShaneR
Wed Apr 22, 2020 8:22 pm
Forum: Request a new Forum here
Topic: General Forum Discussions
Replies: 7
Views: 21201

General Forum Discussions

Hi all

Can we add a "General Forum Discussion" or "General Electrical Discussion" or maybe both?

"Off topic" section I would assume is anything not electrical?
by ShaneR
Wed Apr 22, 2020 8:22 pm
Forum: Request a new Forum here
Topic: General Forum Discussions
Replies: 0
Views: 7952

General Forum Discussions

Hi all

Can we add a "General Forum Discussion" or "General Electrical Discussion" or maybe both?

"Off topic" section I would assume is anything not electrical?
by ShaneR
Wed Apr 22, 2020 8:17 pm
Forum: Off Topic/General Electrical Discussions
Topic: New Forum - Thanks
Replies: 0
Views: 8037

New Forum - Thanks

Hi all

I would just like to thank all those involved in setting this up.

Also I would like to thank the contributors, with out contributors a forum has nothing.

Big thanks to all.