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Old 07-03-2019, 12:59 AM   #1
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Default Support using a transformer

I have been an electrician for around 4 years. Throughout that time, I've seen many installations where I see transformers that are mounted on a concrete pad or floor. My question is.... I've seen plenty of times where they use the enclosure , usually the sides of the transformer as means for support. Either the seal tight coming in or a pipe. Using unistrut or minies. Even drilling new holes for the hardware. I've done it, and inspectors never say a thing. Is there a code that will clear this up? Just to determine wether it's legal or not. I've never bothered since it's the way I was taught and it's never been called out . Thanks for the help.
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Old 07-03-2019, 01:29 AM   #2
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Technically, you're not supposed to poke random holes in enclosures, especially outdoor enclosures like NEMA 4's, and you're not supposed to use "boxes" (enclosures) as a means of support for conduits. So, depending on the situation, and inspector, you could get bit by it. I've personally never done it, because there's always a wall or floor close enough to go to. Or, could always build a rack.
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Old 07-03-2019, 01:54 AM   #3
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Old 07-03-2019, 07:50 AM   #4
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I have never strapped a conduit to a transformer, but if I did, I would use a nut and bolt instead of a self-tapping screw. Generally, inspectors that know anything are looking for suitability. So while some modifications are technical violations, if they are suitable for the purpose, it's OK.
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