u/Some1-Somewhere

3,085 post karma · 98.9k comment karma · joined Nov 2014 · moderator

Some1-Somewhere

TME stock a fair bit of stuff. I've bought stuff from there and I'm in NZ.

Some1-Somewhere

The daughter is also a woman and in the video.

Some1-Somewhere

Aircraft have pressurised cabins because they fly too high for humans to breathe easily - this is why there's oxygen masks; in case the pressurisation fails.

Conventional aircraft take compressed air from the engines (or APU, a small generator in the tail), heat/cool it, filter it, and feed it into the cabins. Jet engines naturally produce compressed air as part of their operation.

While it's fairly rare, there have been issues with engine oil, de-icing fluid, and other contaminants getting into the air supply, usually on the ground. Over the decades, there's been a few fatalities and a contested amount of long-term gradual damage caused by so-called 'fume events'.

The 787 uses electric air compressors then heats/cools and filters it. They should be somewhat less prone to having contaminants leak into the air supply.

It's not something I'd be worried about as a passenger. If I was working for decades on aircraft, I might be more concerned.

Some1-Somewhere

So, in late August John got a tin of the exact National blue paint ‒ Resene Endeavour Blue

Journalist is giving people ideas...

Some1-Somewhere

If they're under 25t they should be doable on a class 3.

I haven't found a weight spec for them.

Some1-Somewhere

Plenty of other countries have similar 50:1 FA rules; none have the CRJ550. This is 95% scope clause.

Some1-Somewhere

Looks like Mitre 10 stocks them too.

Some1-Somewhere

Yup. Water heater is normally 2-4kW and can run for hours. Very expensive to ignore.

Some1-Somewhere

Pictures at this link: https://www.accesscomms.com.au/mains-plug-insulated-pins/

Note the plastic might be white or black or some other colour depending on the design.

Some1-Somewhere

Humans almost never pass enough current to trip a breaker/fuse - you need double digit amps. I assume the same is true for cats.

Some1-Somewhere

Inverters don't have the peak:average ratio and spare capacity that spinning metal does. Battery is average but PV doesn't have anything left to feed into a short circuit.

Some1-Somewhere

It's companies that are burning fuel for process heat, and making electricity as a byproduct.

Some, especially timber/pulp and steel plants, are burning nearly 'free' by-products.

Some1-Somewhere

It's the lowest priority to electrify; burning the fuel to produce heat directly is more efficient than burning fuel to make power to produce heat. It only makes sense to move from co-gen if the grid is almost all renewable almost all of the time. We're pretty close to that.

Some1-Somewhere

Spillways absorb/dissipate energy from the water, so they tend to need more maintenance and resurfacing if used heavily.

OTOH, wind needs more maintenance with more generation.

Grid stability is also better with more spinning mass which hydro is and wind isn't really.

Some1-Somewhere

I noted that I was using the 90C tables. But yes, common practice for us is generally 16A for 2.5mm in domestic, 20A in commercial where there is generally no thermal insulation near cabling.

We would generally have no qualms running 6mm at 32A.

Some1-Somewhere

Electrolytic AC caps exist. You may be seeing more pixels than I am if you can see polarity markings.

Some1-Somewhere

It's probably that it ends up being four fewer units per shipping container.

Some1-Somewhere

AC capacitors exist, but this is probably not one of them.

Some1-Somewhere

This is out of ASNZS3008.1.2:2017, the 'fancy' version of the NZ cable selection standard:

https://i.ibb.co/3yzbnQ9n/Screenshot-2026-10-26-065924.png

This is purely pertaining to thermal conditions, not voltage drop or fault current.

But it does show 33A (and even 41A) as being valid for 2.5mm2, provided it's suitable for operation at 90C, and you're really playing silly buggers with the installation conditions.

We don't have an explicit "in concrete wall" condition because we just don't do it that often. I'm assuming it's something like buried in wiring enclosure, but without the colder ambient temperature.

Ambient temperature will also depend on region; the Australian version of the standard assumes everything is 10C warmer and derates accordingly.

Edit: 2.5mm2 as installed by OP is almost certainly non-compliant, but 6mm is pretty reasonable for 32A and 4mm may be acceptable in some cases. 10mm is likely overkill unless there are reasons for a major derate.

Some1-Somewhere

"BJTs are current-controlled devices" is itself (the bones of) a model.

Some1-Somewhere

Cold water can boil if the ambient pressure is low enough.

</pedant>

Some1-Somewhere

Probably.

Some1-Somewhere

It depends on ambient conditions, cable type and assumed temperatures.

If we assume the cables are suitable for 90C operation and that separate cores in conduit in concrete is similar to underground in conduit, my copy of ASNZS3008.1.2 says 33A.

Adding insulation and assuming 75C knocks things way back, but 6mm and in some cases 4mm is still adequate.

Some1-Somewhere

The same goes for food, water, road transport, electrical etc.

It's probably not as safe as western aviation, but it'll still be the safest part of the trip.

Flew around Vanuatu in a Harbin Y12; in hindsight that might have been pushing it...

Some1-Somewhere

OP is seeing about a quarter of normal production. It seems unlikely to be an issue with only one string, assuming at least two (possibly 3-4) strings are installed.