Selection and Installation of Wiring Systems

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New Features

Last post by gregmcc « Thu Apr 23, 2020 12:23 pm
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by gregmcc » Thu Apr 23, 2020 11:50 am » in Announcements

Hi everybody,
Just thought it was time for an update. We have over 160 members which is very good. Thank you for your support!

A few new features...

4 Replies

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Last post by gregmcc
Thu Apr 23, 2020 12:23 pm

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Old unknown cable

Last post by Dan L « Mon Oct 19, 2020 4:24 pm
Replies: 10
by Dan L » Tue Oct 13, 2020 9:47 pm

Today on a new install electrician had used a potentially very old unknown cable that was in storage.

It's a 3 phase neutral screen. It looks like...

10 Replies

170 Views

Last post by Dan L
Mon Oct 19, 2020 4:24 pm
Triple Plating an Isolator

Last post by AlecK « Wed Oct 14, 2020 10:09 am
Replies: 3
by JamieP » Sun Oct 11, 2020 4:34 pm

Just for arguments sake because I'm pretty damn certain this is absolutely not ok because it defeats the wholesaler purpose of a device for isolation...

3 Replies

72 Views

Last post by AlecK
Wed Oct 14, 2020 10:09 am
3.9.8.4 (b) Segregation

Last post by DougP « Sun Oct 11, 2020 9:11 pm
Replies: 1
by JamieP » Sun Oct 11, 2020 4:38 pm

separation of distributed gas and water systems

What does this mean?

Does this include things such as heat pump pipes?

Does this include water...

1 Replies

37 Views

Last post by DougP
Sun Oct 11, 2020 9:11 pm
Ordinary Duty Flexible Cord for ELV

Last post by AlecK « Tue Aug 25, 2020 8:31 am
Replies: 5
by JamieP » Sat Aug 22, 2020 3:40 pm

Is ordinary duty flexible cord suitable for ELV without an additional enclosure?

Just curious because of the fact that single insulation is suitable...

5 Replies

267 Views

Last post by AlecK
Tue Aug 25, 2020 8:31 am
LV Wiring through inter tenancy walls/floors

Last post by AlecK « Thu Aug 06, 2020 5:40 pm
Replies: 1
by downtoearth » Thu Aug 06, 2020 5:14 pm
Rating: 12.5%

Hi All,

Not sure if this is the right sub-forum so feel free to move if required - would possibly fall under a 'general' question?

I'm currently...

1 Replies

144 Views

Last post by AlecK
Thu Aug 06, 2020 5:40 pm
Max demand Table C1

Last post by AlecK « Thu Jul 30, 2020 4:49 pm
Replies: 5
by Dano » Thu Jul 30, 2020 9:01 am
Rating: 12.5%

Hi All,

Just trying to get my head around the wording in Table C1, load group D, in regards to space heating and working out the MD for the entire...

5 Replies

223 Views

Last post by AlecK
Thu Jul 30, 2020 4:49 pm
Segregation and interference

Last post by JamieP « Mon Jul 27, 2020 2:07 pm
Replies: 4
by JamieP » Sun Jul 26, 2020 8:25 pm

I've been looking at at segregation requirements due to working a lot with instrument and instrumentation systems

At first I looked at the...

4 Replies

204 Views

Last post by JamieP
Mon Jul 27, 2020 2:07 pm
Conductive wiring enclosures

Last post by AlecK « Fri Jul 17, 2020 11:46 am
Replies: 3
by DougP » Fri Jul 17, 2020 9:58 am

3.10.3.3 Continuity
Mechanical and electrical continuity of conductive enclosures shall be maintained.
Exception: Continuity of conductive enclosures...

3 Replies

177 Views

Last post by AlecK
Fri Jul 17, 2020 11:46 am
Emergency lights with built in battery backup

Last post by AlecK « Tue Jul 07, 2020 9:07 am
Replies: 5
by JamieP » Mon Jul 06, 2020 7:25 am

7.2.1.3 (b) Central system emergency evacuation lighting complying with the AS
or AS/NZS 2293 series.

Can someone explain to me what a central...

5 Replies

230 Views

Last post by AlecK
Tue Jul 07, 2020 9:07 am
Electrical Engineered installations - what sort of liability do I have?

Last post by AlecK « Mon Jun 29, 2020 10:13 am
Replies: 2
by JamieP » Sun Jun 28, 2020 8:33 pm
Rating: 25%

A lot of the installations I've been working on lately have been engineered by people above and we simply follow a plan or schedule

If something...

2 Replies

157 Views

Last post by AlecK
Mon Jun 29, 2020 10:13 am
Three Phase Stove / Range

Last post by jjm5jjm5 « Sun Jun 28, 2020 12:02 pm
Replies: 6
by jjm5jjm5 » Sat Jun 27, 2020 3:36 pm
Rating: 25%

Proposing 3P stove in kitchen, do not want large ugly 3P 56 series type isolator on kitchen wall.
Could I install a standard SP switch, which would...

6 Replies

239 Views

Last post by jjm5jjm5
Sun Jun 28, 2020 12:02 pm
Cable derating for cantinary wire AS/NZS 3008

Last post by JamieP « Tue Jun 23, 2020 10:04 am
Replies: 2
by JamieP » Mon Jun 22, 2020 3:01 pm

Just looking at 3.5.2.2 (c) of 3008

Is this saying derating need not apply to cables on cantinary wires?

2 Replies

149 Views

Last post by JamieP
Tue Jun 23, 2020 10:04 am
Copper tails for aluminium sub mains

Last post by PeteRig « Wed Jun 17, 2020 8:37 am
Replies: 5
by ShaneR » Tue Jun 16, 2020 2:53 pm

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...

5 Replies

264 Views

Last post by PeteRig
Wed Jun 17, 2020 8:37 am
Green only heat shrink for earth's

Last post by JamieP « Tue Jun 16, 2020 10:09 am
Replies: 2
by JamieP » Mon Jun 15, 2020 7:14 pm
Rating: 12.5%

So a company I'm working for seems to only order heat shrink that is a solid green color, not green/yellow

I was under the impression this wasn't...

2 Replies

130 Views

Last post by JamieP
Tue Jun 16, 2020 10:09 am
Farm pump - underground power supply cable type

Last post by AlecK « Mon Jun 15, 2020 12:13 pm
Replies: 3
by ShaneR » Mon Jun 15, 2020 10:12 am
Rating: 37.5%

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)...

3 Replies

165 Views

Last post by AlecK
Mon Jun 15, 2020 12:13 pm
Installation of heating element for tile heat systems

Last post by AlecK « Mon Jun 15, 2020 10:53 am
Replies: 1
by JamieP » Sun Jun 14, 2020 10:01 am
Rating: 25%

May not be the right area to post this but wasn't sure where to put it, I've seen this a few times in the old forums but thought I'd get some fresh...

1 Replies

234 Views

Last post by AlecK
Mon Jun 15, 2020 10:53 am
Underground wiring systems

Last post by AlecK « Wed May 27, 2020 10:11 am
Replies: 7
by DougP » Sat May 23, 2020 11:06 pm

I know I've probably asked this before.. but I would be interested in some more opinions.

3.11.2 classification of wiring system.

After the...

7 Replies

320 Views

Last post by AlecK
Wed May 27, 2020 10:11 am
Add new kitchen with Electric Hob & Oven and exceed Max Demand

Last post by AlecK « Tue May 26, 2020 8:44 am
Replies: 7
by Tiger » Mon May 25, 2020 11:44 am

Hi Everyone,

We have a client who is going to build two more bedrooms and one more kitchen to the existing house. It is not sleepout or outbuilding...

7 Replies

351 Views

Last post by AlecK
Tue May 26, 2020 8:44 am
Underground services, seperation and entering building

Last post by Dan L « Fri May 22, 2020 10:15 pm
Replies: 2
by Dan L » Fri May 22, 2020 6:02 am
Rating: 12.5%

In regards to underground services and separation distances table 3.7 it mentions mechanically protected,not additional protection just mechanically...

2 Replies

219 Views

Last post by Dan L
Fri May 22, 2020 10:15 pm
Identifing Earths as Live Conductors

Last post by AlecK « Wed May 20, 2020 10:24 am
Replies: 6
by JamieP » Tue May 19, 2020 8:30 pm
Rating: 12.5%

I know this is non-compliant now but can anyone point me to what Regs and even better if you can provide the Clause that this was legal under

Does...

6 Replies

261 Views

Last post by AlecK
Wed May 20, 2020 10:24 am
Cable Protection 50mm 3.9.4.2 vs 3.9.4.3.2

Last post by AlecK « Fri Apr 24, 2020 11:04 am
Replies: 3
by JamieP » Tue Apr 21, 2020 11:22 pm
Rating: 37.5%

The first says it's in regards to wiring systems near building surfaces and says protect via 3.9.4.4 if 50 mm from the surface of a wall, floor,...

3 Replies

245 Views

Last post by AlecK
Fri Apr 24, 2020 11:04 am
Parallel conductors 3.4.3

Last post by JamieP « Sat Apr 18, 2020 12:25 pm
Replies: 11
by DougP » Fri Apr 17, 2020 10:15 am

Can conductors within a multi core cable smaller than 4mm², be used in parallel? Such as a 2.5mm² 4c+e used with two sets of parallel conductors....

11 Replies

358 Views

Last post by JamieP
Sat Apr 18, 2020 12:25 pm
Measuring Max Demand

Last post by Sarmajor « Sat Apr 18, 2020 12:04 pm
Replies: 6
by JamieP » Thu Apr 16, 2020 2:50 pm

Are there any useful tool for measuring max demand in existing installations? I understand you can go around and count everything up and then work it...

6 Replies

272 Views

Last post by Sarmajor
Sat Apr 18, 2020 12:04 pm

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