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Electricians - an awkward bunch to deal with
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coppice:

--- Quote from: tggzzz on March 29, 2023, 07:48:50 pm ---
--- Quote from: mendip_discovery on March 29, 2023, 07:29:27 pm ---Talk of some of these out of the training course electricians reminded me of Isaac Asimov and the Foundation books.

--- End quote ---
I found and find his 1957  novella "Profession" more useful; I recommend it to anyone thinking about career futures. Especially good w.r.t. the engineer vs technician debates.

--- End quote ---
I'm interested in why you are attracted to that story. You can read so many things into it. Its a totally unrealistic tale. The Social Scientists are second rate, and not much much lower. :)
tggzzz:

--- Quote from: coppice on March 30, 2023, 01:57:38 am ---
--- Quote from: tggzzz on March 29, 2023, 07:48:50 pm ---
--- Quote from: mendip_discovery on March 29, 2023, 07:29:27 pm ---Talk of some of these out of the training course electricians reminded me of Isaac Asimov and the Foundation books.

--- End quote ---
I found and find his 1957  novella "Profession" more useful; I recommend it to anyone thinking about career futures. Especially good w.r.t. the engineer vs technician debates.

--- End quote ---
I'm interested in why you are attracted to that story. You can read so many things into it. Its a totally unrealistic tale. The Social Scientists are second rate, and not much much lower. :)

--- End quote ---

A fiction story being unrealistic? Who would have thought it?!

The very significant difference between someone that is

* taught how to work on existing equipment and follow best practices
* creates new types of equipment and defines best practices
Both are beneficial and necessary.

The required strengths (skills/personality/competence) and allowable weaknesses are completely different.

Be aware of the differences, and choose accordingly.

Too many people on this forum don't understand the differences between engineers/doctors and technicians/nurses. That story is an alternative way of getting the concept across
NiHaoMike:

--- Quote from: james_s on March 29, 2023, 02:47:21 am ---If you think electricians are bad, try dealing with HVAC guys.

--- End quote ---
The HVAC tech I know (now an embedded software engineer at Daikin) is very nice. But she's about my age so definitely not the average HVAC tech at the time.

--- Quote from: paulca on March 29, 2023, 09:27:10 am ---The worst bit is.  The scope of the regulations shifted from "roof top solar" and "grid tie" inverters to include any and all energy storage systems whether they feed in or not, regardless of voltage, power, AC or DC.  They are ALL covered.

My basic questions was, given my limited installation purpose, how much of it applies to me?  What do I NEED to do, such that I don't get ripped off paying for an OTT install I don't need.

This goes off the rails because the inverter I am installing is part of a range which, can, technically be configured to "feed out" the AC IN.  I am still left unsure if this is or is not the case.  The inverter is part of a large range of inverters which go from 12V/500W up to 48V/5000W and parallel and series way up further.   Some units are designed for caravans and some for full rooftop solar rigs.

--- End quote ---
Install the batteries and inverter on a cart with wheels and use ordinary plugs and sockets for connecting to the mains and load, then it would be a UPS and not part of the building.
paulca:

--- Quote from: NiHaoMike on March 30, 2023, 01:43:27 pm ---Install the batteries and inverter on a cart with wheels and use ordinary plugs and sockets for connecting to the mains and load, then it would be a UPS and not part of the building.

--- End quote ---

I am tempted to run it this way, at very least in the interim.  Plugged into a plug socket if and only if/when I want to charge the batteries. 

It arrived.  It's tiny.  It's the size of loaf of bread.  I thought it was the size of a suitcase!  I am still waiting on the other 4 cells to arrive before I can even attempt to power it on.

It's not a permanent fixed installation on either end.  It would exactly like I had just parked the caravan in the drive way and connected it's ESS system to the wall socket to charge it.

There is a real potential the DNO phones me back and just says it's so small they aren't interested, knock myself out.
MT:
Take a razor blade, gently cut your self somewhere on your hand so you "slowly drip" bleed, now take a 9volt or even a 1,5V battery and let the poles go into the cut.

Now, the TREMENDOUS pain you will feel in you "entire arm" is profoundly different from a AC voltage pain , like temporary licking on a 240 outlet.
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