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<div class="moz-cite-prefix">On 9/2/21 09:33, Mel Beckman wrote:<br>
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<blockquote type="cite"
cite="mid:5805C86B-4B9C-4FC8-BDF0-95B6B2B81775@beckman.org">
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Here’s a nice article on the code issue, which is nationwide in
the US (it’s part of the NEC). It speaks specifically about the
generator requirements:
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<div class=""><a
href="https://temperaturemaster.com/furnaces-hardwired-what-you-need-to-know/"
class="" moz-do-not-send="true">https://temperaturemaster.com/furnaces-hardwired-what-you-need-to-know/</a></div>
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</div>
<div class="">TLDR: <span style="color: rgb(54, 57, 64);
font-family: libre_franklinregular, Arial, Helvetica,
sans-serif; font-size: 16px;" class="">The NEC is against
plugged-in furnaces for a good reason: they consume so much
electricity that they need a dedicated circuit. When you have
a plug-in furnace, you’re likely to plug it into a shared
outlet with other appliances. As a result, the circuit gets
overloaded, damaging the furnace and the other plugged-in
electrical devices or even resulting in a fire. </span></div>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom:
20px; color: rgb(54, 57, 64); font-size: 16px; line-height: 1.9;
font-family: libre_franklinregular, Arial, Helvetica,
sans-serif;" class="">
So, converting a hardwired furnace into a plugged-in constitutes
an NEC code violation.</p>
<div class="">The article then proceeds to show how to safely
violate the NEC with a plug and socket, and how to follow the
letter of the law with a transfer switch or interlock kit. </div>
<div class=""><br class="">
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<div class="">I think these are the same devices my brother Peter
might be talking about. :)</div>
</blockquote>
<br>
We have two kettles in our kitchen, and one of them seems to be
slowly breaking down. So my Mrs. ran both at the same time last
week, and was wondering why one of the breakers in our panel kept
tripping. The two separate sockets that serve each kettle are wired
to the same 20A breaker into the panel. That was an easy one to
explain... run one at a time.<br>
<br>
Just easier to not encourage folk to breakout high-current devices
such as these into regular wall sockets. Most people do not
understand the effects of cascading loads on a single circuit,
especially when they don't get that different loads generate
different current, even if the voltage is the same. And nor should
they, if we always implement and certify code compliance.<br>
<br>
But alas, the real world...<br>
<br>
Mark.<br>
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