rickman  wrote:
> On 4/5/2017 9:27 PM, Dennis Lee Bieber wrote:
>> On Thu, 6 Apr 2017 00:43:45 -0000 (UTC), Martin Gregorie
>>  declaimed the following:
>>
>>
>>> Of course, 110v has a lot to answer for there: in the UK a 3kw heater or
>>> power tool draws 12.5A, just under the 13A limit for standard plugs, but
>>> a 3kw appliance will draw 27.25A in the USA - and its amps, not volts,
>>> that melts or burns insulation off a cable.
>>
>> And in the US, that appliance will be using a 240V connection (two 120V
>> circuits of opposite phase: +120, Neutral, -120, and earth ground [I'm
>> using +/- for phase, since both are AC]). Regular wall sockets tend to be
>> 15A, with the entire linked set on the circuit maxing out around 20A.
>
> To balance the current draw on the two phases I have seen outlets run on
> both phases of the power line.  Some will be wired on one phase and some
> on the other.  I was very surprised to find 240 volts when measuring
> from one socket to another one day.  I was reading something about this
> recently and it seems the two sockets in the same box are not to be
> wired on different phases of the 240 line.  Who knew?
>

Hmmm. Sounds like a code violation to wire both phases to (115v) sockets in
the same box...

--
-michael - NadaNet 3.1 and AppleCrate II:  http://michaeljmahon.com

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