Obviously I am not talking about the days of conduit. How utterly horrible that was. Any house still with conduit should be rewired. I am talking about how houses in NZ would be wired today.
macman26,
Jun 18, 10:43am
Wire it however you want. As long as it complies with all the relevant rules and regs. Want to loop power circuits via all PowerPoints or use junction boxes and drop down to each one. Want to do 3 plating. Go for it. A sparky will wire it to suit the situation and what works out better. He can wire a house in steel conduit if they wish. Up to them and who is paying.
macman26,
Jun 18, 3:19pm
Is this because the black wire is switched and not the white one? In some wiring black is Active and white is Neutral. Also as said before appliance wiring is different to installation wiring.
bill1451,
Jun 18, 8:55pm
I know of one guy I worked with who was inclined to rush in, boots and all. Anyway he had a large commercial refrigeration unit to wire up, Product of USA where the colours are different, black is phase. this was a 3 phase unit.He wired it, powered it up and the smoke box ruptured, that was it I think he was shown the door and leave your ute keys on the desk.
tygertung,
Jun 18, 9:14pm
Actually that reminds me of when I was working in the old jet engine shop, we had these big vacuum carts which had a big three phase motor in them for doing a vacuum test of the engine to check for leaks in the oil system, (checking carbon seals etc). Anyway the carts were not wired correctly inside, so all the three phase sockets in the building were wired up out of phase to suit the carts.
We had a new socket put in and the electrician wired it up correctly, and the motor made a funny noise when we plugged it in. The electrician had to change around the socket.
Why they didn't just fix the cart, I don't know.
kitkat66,
Jun 19, 12:25am
It's neither insane or dangerous, it is totally exceptable in the regs as local means of isolation, it is called 3 plate wiring circuit and is exactly the same as at the switch,the only difference is the location.Both use the loop in connection either on the switch or at the batton. Thats why they are there. Unqualified people make the mistake of connecting all the reds in one connection then all the blacks in the other and then wonder why the light stays on. Usually handymen or builders.
kitkat66,
Jun 19, 12:34am
Its common and acceptable to switch a neutral in an appliance. This is because a lot of appliances have a timer.If the phase was isolated at the source the timer would go off. It is however illegal to isolate a neutral only on a stove.
tygertung,
Jun 19, 2:13am
Surely it would be better to switch the phase and only switch the neutral in the case of a timer?
bill1451,
Jun 19, 2:26am
which is exactly why people like "trade 4us" should leave their tools in the tool box, this guy has no understanding of how things are done and what is legal. 3 plating used to be common place where conduit was used, maybe not as common now but still legal.
bill1451,
Jun 19, 2:32am
I wouldn,t have thought the appliance would pass NZ standards but I guess theres that much rubbish coming from PRC theres no checks and balances, its legal only to switch the neutral if the phase is switched at the same time, i.e. double pole switch.Picture this, below average Joe Blow goes to fix his toaster(switched N) and forgets to unplug it and gets his eyebrows singed and face blackened or worse.
bill1451,
Jun 19, 2:38am
kit kat66 cant quite see your logic for switching the neutral on a timer."timer would go off" for any thing to work it needs phase and neutral, or have the laws of physics been changed since I retired. I worked on American Maytag commercial washing machines and dryers for 5 years and admittedly the wiring in them was a nightmare to try and follow, micro switches switching neutrals, but I always isolated before working on them.
vivac,
Jun 19, 5:22am
Dig up.
tygertung,
Jun 19, 6:29pm
My coffee grinder is an Italian made and designed machine, but maybe they did things differently back in the 80s?
tmenz,
Jun 19, 11:50pm
I have a question about 3 plating for the knowledgeable posters - what sort of cable is used to run from the light fitting to the switch? Presumably it has to be twin TPS of 1mm (1.5mm?) or more, but what about the conductor colours? Does it have to be 2 reds (or browns) with no blacks (or blues) allowed? Is that what red and white cable is for? Is coloured sleeving of the ends allowed? What about 3 plating a light fitting that has no built-in loop terminal - Is a separate terminal block required for the phase loop? Does this then have to be enclosed in a junction box if it can't be accommodated in the light fitting itself?
tsjcf,
Jun 20, 6:53am
Normally 1mm or 1.5mm, twin and earth, yes that what the red and white can be used for,if it cant fit in the light fitting you could use a J box.
pheonix,
Jun 20, 8:57am
Coloured sleeving on the ends is no longer allowed either.
captaingraham,
Jun 20, 7:32pm
Reference for that please.
vivac,
Jun 20, 9:49pm
Most people these days would run a correctly sized 3 colour cable (red, white, blue) as that is what most likely in the van.
pheonix,
Jun 20, 10:24pm
3.8.2
captaingraham,
Jun 20, 11:46pm
I think you need to have a refreshing read of the rules.
m16d,
Jun 21, 3:18am
Crikey. some of you sparkys are touchy buggers. trade4 was only asking a question.
macman26,
Jun 21, 5:12am
If you read the clause carefully I think that you will find you can sleeve a live conductor any colour except earth ( I could be wrong on that last bit). Green/ yellow can only be earth. Used to be able to sleeve a live conductor as an earth but I think that change a few years back. But I haven’t access to the rules right now so I’m going off memory. I will stand to be corrected with the relevant clause.
trade4us2,
Jun 21, 8:30am
I have asked the electricians at my work. They were saying that the electrical regulations change often, and few people can keep up with the regulations and they cost a lot to buy, and that few electricians in NZ would wire up houses with switch loops. All very unsatisfactory.
johotech,
Jun 21, 8:42am
Registered electricians get about 90 different standards for free. Maybe the "electricians" at your work aren't registered?
johotech,
Jun 21, 8:46am
Yes you can sleeve the ends of a black as a red, or a red as a black, as well as the other combinations listed in the clause.
And you can sleeve the ends of any colour conductor in a multicore as green/yellow, to be used as an earth.
Since the public registrations are closed, you must have an invite from a current member to be able to register and post in this thread.
Have an account? Login here.