I won’t comment on the issue of how nice it should look for the price you paid.
But in my mind, that is a restricted access location, so inside the enclosure you don’t need wires run in conduit and stuff like that. You could put a sign on the door something like authorized personnel only. But when we build out our own enclosures, we don’t worry if breakers and fuse blocks and power supplies on the DIN rail have exposed terminals, even if they are 120 or 240 VAC or 48 VDC, and we don’t worry about exposed battery terminals. We will bring power into the enclosure via conduit using THHN , and we might put a handibox on the enclosure backplate for AC outlets, but won’t run that THHN in conduit. We’ll use a chase nipple on the handibox. Same with AC to enclosure fans, it would be silly to try and put those in conduit inside an enclosure. What I worry more about with THHN stranded electrical wire is it doesn’t get along with a lot of the compression terminals on DIN rail equipment like power supplies. So I end up crimping ferrules onto the wires, but that can come with its own set of issues. From: AF <[email protected]> On Behalf Of Adam Moffett Sent: Monday, February 16, 2026 3:38 PM To: AnimalFarm Microwave Users Group <[email protected]> Subject: Re: [AFMUG] THHN in Wire loom Fiber. And I dug into it a bit more. The enclosure is actually made by Vertiv. Vertiv sells it with a load center, and they have a battery heater and GFCI outlet prewired. The items prewired by Vertiv have liquitite conduit going to them. An integrator working for Nokia would have installed the rectifier and did the wire loom thing. I'm not sure how well that squares with the "inside of an appliance" notion. Vertiv's instructions point an arrow at the same 3/4" knockout for AC input. I think we're just not supposed to have a 100A breaker. Nokia should talk to their integrator. -Adam _____ From: AF <[email protected] <mailto:[email protected]> > on behalf of Mark Radabaugh <[email protected] <mailto:[email protected]> > Sent: Monday, February 16, 2026 2:35 PM To: AnimalFarm Microwave Users Group <[email protected] <mailto:[email protected]> > Subject: Re: [AFMUG] THHN in Wire loom Drinking the Nokia cool-aid eh? Fiber or LTE? Mark On Feb 16, 2026, at 11:45 AM, Adam Moffett <[email protected] <mailto:[email protected]> > wrote: If the AC and DC wiring are kept compartmentalized, then I think that's true. The AC power components are kept physically separated, so when you open the machine for maintenance you have to open some separate compartment or open another box to get into the AC stuff. It's like that in appliances, computers, and most machines. I guess someone at Nokia must have looked at this and decided it was all ok, but I don't like it. If I cobbled it together myself, it would have come out better than this. <image.png> _____ From: AF <[email protected] <mailto:[email protected]> > on behalf of Chuck <[email protected] <mailto:[email protected]> > Sent: Friday, February 13, 2026 9:51 PM To: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]> > Cc: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]> > Subject: Re: [AFMUG] THHN in Wire loom As a manufactured “appliance” I don’t think the NEC applies to anything inside the box. Sent from my iPhone On Feb 13, 2026, at 4:52 PM, Adam Moffett <[email protected] <mailto:[email protected]> > wrote: This post is part question and part whining. Yesterday I got a look at a manufactured network enclosure from a fairly large company. They have a load center built in, and the feeds to the rectifier are THHN in wire loom. They bring that into the load center with NM box connectors. I want to believe that they wouldn't sell something to us for $30,000 that wasn't up to electrical code, but 1. I have never seen that done before, and neither has our electrician 2. It doesn't make me feel like I got $30,000 worth Does anyone know if this is actually square with the NEC? Even if it's legally ok, how does it make any sense? <image.png> <image.png> Weird thing #2: The installation guide says to bring our incoming utility power through the knockout shown here under the load center. The one next to it with the rubber passthrough is for a ground to the equipment MGB. It's a ¾ knockout, and I added a picture of the bottom side to show that it's not one of the expandable ones. The main breaker in the load center is 100A. Normally you'd want a 1-1/4 knockout for a 100A service. I struggled to think of some creative way to get 100A through a ¾ conduit and still be compliant, but I got nothing. I think we'll have to remove the factory breaker and install a 50A. It's either that or bore a 1.7" dia hole somewhere, and while I do enjoy cutting up metal I don't think I should have to. <image.png> <image.png> -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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