That is true. In the USA usually only high power items like
hot water heaters, power tools, or clothes dryers are wired
for 240V. Everything else is wired for 120V. NEMA 15A
outlets are standard. When I was a kid 110V was standard. I
think some places may still use that.

240V comes in but it is broken into two out of phase 120V
circuits from a grounded neutral.

Allen

-----Original Message-----
From: piclist-bounces@mit.edu
[mailto:piclist-bounces@mit.edu] On Behalf Of James Cameron
Sent: Friday, March 22, 2019 6:05 AM
To: Microcontroller discussion list - Public.
Subject: Re: [OT] Solar Power

On Thu, Mar 21, 2019 at 08:45:27PM +1300, RussellMc wrote:
> [...]
>
http://www.inference.org.uk/sustainable/book/tex/sewtha.pdf

A side issue.

On the 63rd page, marked page 50, it is said that "In
countries where
the voltage is 110 volts, it takes twice as long to make a
pot of
tea."

In UK, it is said that a 230V outlet permits up to 13A.  So
the
limit is 2.990kW.

In Australia, a 240V outlet permits up to 10A.  So the limit
is 2.4kW.

What does the US have as a conventional pluggable cable
limit?
Wikipedia suggests 115V and 15A, or 1.725 kW for NEMA 1-15
or 5-15.

So that is 58% of the UK tea power delivery.

Or 1.73 times as long?

--=20
James Cameron
http://quozl.netrek.org/
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