<div dir="auto">Some junction boxes have specific instructions for weep holes. For scepter PVC junction boxes you can drill a 3/16 inch hole in the bottom to make a nema 4 enclosure nema 3R. The instructions are etched into the bottom of the box.<div dir="auto"><br></div><div dir="auto">Jason</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 29, 2021, 11:46 AM Ray <<a href="mailto:ray@solarray.com">ray@solarray.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Glenn;<br>
<br>
Ahh that's new from NEC 2014. Thanks for pointing that out, and scratch <br>
my previous comment based on experiences in 2008.<br>
<br>
Ray Walters<br>
Remote Solar<br>
303 505-8760<br>
<br>
On 4/29/21 11:41 AM, Glenn Burt wrote:<br>
> NEC 314.15 discusses drainage openings that can be made in enclosures.<br>
><br>
> -----Original Message-----<br>
> From: RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches-bounces@lists.re-wrenches.org</a>> On Behalf Of frenergy<br>
> Sent: Thursday, April 29, 2021 9:43 AM<br>
> To: <a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a><br>
> Subject: Re: [RE-wrenches] MC4s are listed for THWN, right?<br>
><br>
> Eric,<br>
><br>
> I like your idea of drilling the weepage holes as long as they are not big enough to allow critters like wasps to make a home inside the J-box. We will use aluminum tape on unused mounting holes in the back of the box for the same reason. Lurkers welcome.<br>
><br>
> Bill<br>
><br>
> Feather River Solar Electric<br>
> Bill Battagin, Owner<br>
> 4291 Nelson St.<br>
> Taylorsville, CA 95983<br>
> 530.284.7849<br>
> CA Lic 874049<br>
> <a href="http://www.frenergy.net" rel="noreferrer noreferrer" target="_blank">www.frenergy.net</a><br>
><br>
> On 4/28/2021 6:19 PM, <a href="mailto:ericstev@vermontel.net" target="_blank" rel="noreferrer">ericstev@vermontel.net</a> wrote:<br>
>> Wrenches,<br>
>><br>
>> I am normally a lurker on the List, but I would like to add a fact<br>
>> observation and a personal preference to the topics raised by this<br>
>> discussion.<br>
>><br>
>> First, THWN does have PVC as its primary insulation, but it is<br>
>> sheathed in Nylon which is a polyamide plastic. Therefore the<br>
>> compatibility with MC4 connectors should be polyamide being squeezed<br>
>> by the restraining bushing in the MC4, not PVC.<br>
>><br>
>> I prefer Buchanan copper crimp connectors when splicing PV wire to<br>
>> THWN-2 in a roof junction box. The bared wires should be lightly<br>
>> doped with NO-OX-ID A-Special grease<br>
>> <a href="https://www.sanchem.com/electrical-contact-lubricant.html" rel="noreferrer noreferrer" target="_blank">https://www.sanchem.com/electrical-contact-lubricant.html</a><br>
>> <<a href="https://www.sanchem.com/electrical-contact-lubricant.html" rel="noreferrer noreferrer" target="_blank">https://www.sanchem.com/electrical-contact-lubricant.html</a>> before<br>
>> sleeving and crimping with the crimp sleeve to repel entry of moisture<br>
>> and corrosive gasses into the wire joint. I consider the crimped<br>
>> joint to be superior to any screw-clamped joint that would be made in<br>
>> a Polaris style connector. I also drill weepage holes in the bottom<br>
>> corner of the junction box to mitigate any collection of water.<br>
>><br>
>> Eric Stevens, Vermont Made Energy<br>
>><br>
>><br>
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</blockquote></div>