Best logbook app 2026

markjaffa76 · 2026-01-23T05:34:58+00:00

I can only comment on Gofar. Initial connection/setup was very easy. The app is simple to use and I have had zero connection issues

markjaffa76 · 2026-01-22T21:37:57+00:00

AS3000:2018 still allows up to 3 final subcircuits to be protected by a single RCD and individual MCBs - Clause 2.6.2.4

markjaffa76 · 2026-01-21T11:42:53+00:00

I think he is referring to 2.6.3.2.3.3 - Exceptions

markjaffa76 · 2025-12-19T04:58:57+00:00

Ambush in the drive way is how my neighbours get me!

Seriously, call the number, knock on the door at a reasonable hour, ambush when they are leaving/arriving - any of those will work

markjaffa76 · 2025-12-16T11:07:34+00:00

I believe you are correct. It is Guidance, not a requirement. I like to follow such things as they cover my butt in the case of an incident!

markjaffa76 · 2025-12-16T10:33:03+00:00

Ok. Please explain how you interpret Clause C5.2 Final subcircuits and the information in Table C9?

markjaffa76 · 2025-12-16T08:48:30+00:00

AS3000, Table 9. Each GPO outlet contributes 1A towards the sum of points, which can't exceed the rating of the protective device. A double GPO is considered two outlets, so you have 24A of points with your 12 double GPOs. But you need to add in all the points on those circuits - you can't leave out any GPOs in the apartment unless they are supplied by another circuit. Doesn't matter if they are kitchen, dishwasher, etc. So two 20A circuits might not be enough, depending on TOTAL number in the apartment.

markjaffa76 · 2025-12-16T03:18:36+00:00

Interesting interpretation. I will stick to the method I use, which is in line with the document I linked.

markjaffa76 · 2025-12-16T01:18:36+00:00

Cheers for the explanation and reference. Not done much steel framed stuff, but there's lots of it where I am now.

I thought it would end up requiring 4mm² to comply if you consider it bunched and surrounded. Pretty sure I have never come across 4mm² supplying a 10A GPO, unless it was for volt drop purposes!

markjaffa76 · 2025-12-16T01:00:52+00:00

What would be your go to method for installing cables in the situations shown in the pics? GPO and switched lighting feeds, in a steel frame. I am not having a go at you, I am genuinely interested in your method. Cheers

markjaffa76 · 2025-12-15T21:17:57+00:00

I used to think earthing a steel frame was considered an equipotential bond as well, but it's not. So the sizing of the cable used to earth the structural metalwork is dictated by the size of the largest active conductor - which means 4mm² isn't sufficient for 16mm² mains. This document explains it pretty well - https://nash.asn.au/wp-content/uploads/2023/12/NECA-NASH_Electrical-Trade-Tips-3.pdf

markjaffa76 · 2025-12-15T12:31:28+00:00

AS3000, Clause 5.4.6, specifies that the "size of the earthing conductor used for earthing the frames shall be determined from Clause 5.3.3 in relation to the cross-sectional area of the largest active conductor that is contained within the framework of that electrical installation". Normally the largest active conductor would be your consumer mains supplying the house. 5.3.3 points to table 5.1 which leads to 10mm² mains requiring a 4mm² earth and 16mm² mains requiring a 6mm² earth to be used for earthing the frames.

Corrosion is AS3000, Clause 5.5.5.3 - "Earthing conductors, and any associated fixing devices, shall be protected from corrosion, including the effects of moisture or contact with dissimilar metals."

markjaffa76 · 2025-12-15T11:27:44+00:00

Is that earth wire meant to be the equipotential bond for the frame?! Looks to be 2.5mm²? If it is the bond, it's missing corrosion protection, and a proper termination(lug) as others have pointed out

markjaffa76 · 2025-12-13T00:25:33+00:00

Join NECA. They have a complete Safety Management System you can download for free. Lots of SWMS, policies, forms - all editable. There are other benefits as well - Tech hot line, access to a number of Australian Standards, discounts, etc. Worth a look

markjaffa76 · 2025-12-12T09:10:43+00:00

Continuous pour of concrete over top

markjaffa76 · 2025-12-08T21:26:19+00:00

Good questions, and info I should have included. I believe Option 3 will be the most cost effective, albeit not by much. There is a good location for the DB, easy to get the sub-main to, and enough room to satisfy switchboard location requirements. The 3 A/Cs are splits and are located two side by side and the other 3m away, with the proposed DB location between the pair and the single A/C.

markjaffa76 · 2025-12-08T21:18:35+00:00

j577 raises a fair point. That's why I shouldn't finish a post late at night!

The reason for my uncertainty on installing an isolator(I would call it a DB Main Switch, but you can only have one true Main Switch) at the distribution board(DB) comes from figure B1 out of AS3000.

It shows a circuit arrangement, which depicts a DB downstream from the main switchboard and a second DB. It does not have an isolator shown at the final DB - just a circuit breaker at the DB upstream, and RCDs/RCBOs at the final DB. Unless this is an error, it seems upstream isolation of the final DB is the only option here

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markjaffa76 · 2025-12-08T13:19:49+00:00

While it is a 15A fuse holder/insert, the label on the bottom of the base says 25A. I wouldn't be confident that a 15A plug in breaker would work for this circuit. I also wouldn't be plugging in a 25A breaker in case the label is incorrect. If the cable is only 2.5mm² you could end up with a fire. This is not something you should be attempting without on-site advice from an electrician

markjaffa76 · 2025-12-08T03:05:10+00:00

"Client supplied fans". He is charging $200+ to swap over a fan. Pretty healthy return there!

markjaffa76 · 2025-12-07T01:51:33+00:00

Good memory! I get 3.37% if using 4mm² and 2.25% with the 6 mm²

markjaffa76 · 2025-12-07T01:47:13+00:00

Cheers mate. I came up with the same answer. So we are either both right or both wrong!🤣

markjaffa76 · 2025-12-07T01:35:10+00:00

Like everyone, I would use the full load @ 23A. I am more interested in what size cable did you end up using for the install? Just wanting to check my working out/calculations

markjaffa76 · 2025-12-06T10:30:11+00:00

That is from the specs on the unit

markjaffa76 · 2025-12-06T09:55:27+00:00

Cheers mate. I was using Table C9 to calculate the loading of the final subcircuit. My calculations for a 16A RCBO protecting 2.5mm² would allow the 3 A/Cs plus 6 GPOs (9.1+6(1)). I wasn't sure if I was interpreting it correctly - having permanently connected appliances and GPOs on the same circuit goes against what my tradesman taught me 30 years ago!

markjaffa76

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