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It seems that if the strands were stretched and therefore thinned,
that that would increase resistance, some. I think more importantly,
the insulation bunchs up and cracks, and is definitely
compromised. Also with strain hardening of copper, I'm sure some
strands could break internally with a tight enough bend. I've heard
at least for bare ground wires that lightning will jump off to the
case at tight bends, but I've never actually seen that. <br>
Aside from all that, is there actually an increased impedance from a
tight bend (like in plumbing)? I don't know. <br>
I've had to stop more than one journeyman from violating 300.34. I
just tell them the bends should look like the long sweeps in conduit
relative to the diameter of the wire: also purdy.<br>
<br>
Aloha,<br>
<br>
Ray<br>
<br>
On 11/16/2011 10:35 AM, Marco Mangelsdorf wrote:
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<p class="MsoNormal">Some electricians have great fun in making
90 degree wire
bends to try and make their enclosure wiring look so purdy.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Given the importance of maintaining wiring
radiuses, this
can’t be a good idea, can it? Is the issue greater resistance
when the
wire is bent at a straight 90 degrees (or more)?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">marco<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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