[RE-wrenches] Factory Over bent Wiring

[Ray]

Hi Will;

I understand that a UL factory assembly trumps any inspector concerns in 
the field, that's why I left those wires alone. However, no engineer 
designed that wire damage in.  There is no need for it to be bent that 
tight, there is plenty of space. If they did require a tight bend, there 
are 90 deg lugs or insulated buss bars for that purpose. I'd have to say 
this is definitely a short coming of the UL inspection process.

If that work were done by my crew, I would have them replace all the 
damaged wire.

Here is another THHN wire that is completely mauled with plier marks to 
straighten it.  The factory workers were getting obsessed with straight, 
instead of what's right.

The electrons don't care about looks, but will happily short through a 
bad spot in the insulation.

For comparison, here is the wiring in a Midnite E Panel, where they have 
the correct bends.


Ray Walters
Remote Solar
303 505-8760

On 10/15/18 12:27 PM, Will White wrote:
> NEC doesn't apply to the interior components of a UL listed device 
> although I do see your point. I'm assuming they designed it taking 
> that bend into consideration.
>
> On Mon, Oct 15, 2018 at 1:20 PM Ray <ray at solarray.com 
> <mailto:ray at solarray.com>> wrote:
>
>     Greetings;
>
>     I've noticed several of the factory wired power panels over the
>     years from Magnum, Outback, Midnite, Etc are not compliant with
>     NEC 300.34 wire bending radius. (Radius should not be less than 8
>     times the diameter) Basically they should look like sweep bends in
>     PVC conduit, not plumbing.  Here's a pic from a recent Magnum system
>
>     You can see the kinks in the insulation on the inside of the bend,
>     and the color fading on the outside from being overstretched. 
>     Some might think this is neat work, but its actually permanent
>     wire damage and a code violation. Imagine the strain on the copper
>     inside.
>
>     Midnite is very proactive and has improved, I ask that Magnum do
>     the same and soon.
>
>     Thanks,
>
>     -- 
>     Ray Walters
>     Remote Solar
>     303 505-8760
>
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