Installing a 550lb transformer above a drop ceiling.
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- Опубликовано: 30 сен 2024
- http:www.electricalindustrynetwork.com
A few pictures of hanging a 75 kva transformer in the air. Using a mechanical lift capable of lifting 1000lbs and a security strap aided in installing this monster.
I use all 3/8" hardware and deep unistrut.Care was taken at all times for our safety. There was not sufficient room to use a fork lift.
Some tools used were drills,sawzall,hammer,ladders,snatchem' strap & a lot of planning.
Based on article 450.13 b, it says that a transformer larger than 50kva cannot be installed above the drop ceiling.
A very good job well planned, thought out and executed. It is great when it all comes together like clockwork. also bonded well (so many people dis-regard this stage thinking that the cpc will handle it)
Unfortunately this would not pass code here . First we have to install solid rod not threaded The rod is rated with load stamping on to it. min size for this weight 5/8th up to 3/4 inch before it requires welding . It comes in varied lengths with only 4 inch of thread on each end . These have to be double nutted washer& lock, the second nut being nylon
Second is seismic bracing at four sides for earthquakes. Being 550lb this has to be done with rods not cable.
4x4x 1/4 inch angle steel for base
Just to top off the show engineering specs/stamp on the truss to ensure there are no loading issues
The web truss you have there are minimal loading if you have a snow load on this it amplifies the load . (Warm /cold location)
550lbs maybe an issue with snow added to it .
If its even close ,webbs would require plate welded to it to beef up and minimize flex.
Welcome to my world😪😪🤯😬
Fyi U-channel or strut as you may call it is not structurally rated unless of course you bought the stamped channel.
Just saying
So hanging this ,,your 1 hour would be about three plus a good day prepping . 😒😒😒😢
Cost would be anywhere between 2000.00 to 4000.00 if Eng papers required just to hang this transformer no wire.......yet 😁
Enjoy
I'm interested on how you would put seismic bracing on this type of installation, that should be factored in also
a few years ago I built an Mechanical room for a town's convention center. To my surprise I was the only one in charge of the project. Seemed like everything I did I did alone...no help what so ever..and I was an apprentice at the time. Anyhow, I hung a transformer like your video where I was glad the Union pipe fitters didn't give me hell about using their HVAC Jack. They always asked why I always worked alone and everybody got a helper. But I got the job done with all the conduit layout and all the good stuff. Thanks for sharing the video.
First time I an apprentice was trusted at this level good for you
Awesome video. How do you know how much load you can hang from the ceiling? How do you figure out what bolt size to use? In case of vibration, is the transformer actually bolted to the lower strut? Thanks.
In this case we had the structural engineer do all the calc's for us. In the past the,honestly, the guy I was working for guaranteed me it would be strong enough. I have looked up the strength of 3/8" all thread and found it to be sufficient for the need.The transformer is bolted to the strut and lock washers were used.
quick question , how height can be a transformer go above finish floor ?
Anyone know what lift this is?
Nice install. I would have used angle steel with 1/2’ rod. But that’s a typical industry location and install. 👍
I think you are in violation of nec 450.13. If it is over 50kva and above a t-bar / drop ceiling.
I am not seeing where a transformer above 50kva is addressed in (a) or (b) of 450.13. If your thought is accessibility it does say "not permanently closed in by structure". Depending upon the definition of structure I believe it is good to go.
not to mention 450.219(a)
Benjamin Kalionzes
450.219(a) ? What are you referencing here?
clearance 12 " minimum
Benjamin Kalionzes
The insulation above is non-flammable and the structure is steel.
450.21 Dry-Type Transformers Installed Indoors.
(A) Not over 1121⁄2 kVA. Dry-type transformers installed
indoors and rated 1121⁄2 kVA or less shall have a separation
of at least 300 mm (12 in.) from combustible material unless
separated from the combustible material by a fireresistant,
heat-insulated barrier.
Good stuff
Amazon has annoyed me so much with 120 V incandescent lightbulbs my country has more than double so I invented something we need I would plate not too big and plug extracted from the old fluorescent lamp and the transformer let's wire them complex math question also know what we need a socket for the light so we can screw 120 V light with no problems the reason United States has 120 V because old is ancient carbon lighting Will burn out well I hook up 240 V and incandescent lightbulbs are my favorite light sources they are not designed to run at worldwide voltage like a laptop phone tablet charger etc. I was thinking hooking up a transformer directly into the light fixture and my light fixture supports up to 250V and 100 W lamps and incandescent lightbulb supports from 1.5 V like 300 V some of them not all of them my fixture requires 1.5 W 240 V lightbulb and all the way up to 300 volts and 100 W lamps anything higher than that will melt the light fixture sorry about that long story eBay has all the way 300 V incandescent lightbulb Amazon doesn't have because I'm using Amazon what is the only solution I can't find safe and not blowing up as a creeper in Minecraft game
Nice job, I'm interested in knowing what kind of lift that is, I have the same project coming up.
Installing transformers is my favorite project on the jobsite :)
Yes indeed,transformers,panels and service sections. The good stuff!
I like the Big Xformers. 13kv pr 480 sec.. but hey i will install a bell Xformer too... LOL
One time five of us guys had to lift one of these up to about six feet - in a very tight electrical room - absolutely BS the way some companies plan our day, yes it was horrible.
You say in your video that there was another video of you laying everything out on paper. Do you have a detail or drawing that I can please have to give to my Sub along with this video so they can hang the transformer?
A vid on your van or truck please, your so organised I'd like to see if there's something I can copy! Great vids really enjoying them
I like how one of the few posts that shows your own work is a code violation. This channel is good in a really meta kind of way.
On construction documents when the engineer just shows a ground symbol for transformer ground, what grounding methods are most likely used?
Building steel,ground rod
Who makes the lift? Model #?
Yep. Code violation. Too big to be mounted above suspended ceiling.
@g quinn I've mounted plenty of transformers in the air. Double strut and 1/2" allthread will work great. That thing won't go anywhere.
Looking good 👍
Where did you get the lift from?
We borrowed it from the HVAC contractor.
@@electricalindustry nice. I have to do the same thing and securing a lift is my biggest obstacle.
3/8" all- thread is only good for 600lbs. I would have gone with 1/2", double nutted, with unistrut square washers.
So x 4 =2400lbs 600 lbs each E.Engineer & Structural Engineer approved
+EIN
What about lateral bracing? Lemme splain. I just realized you're in Arizona (?) (Go to Arizona for vacation, come home on probation)(jk)
We, have what's known as "seismic code" here in So. Cal. As if the NEC wasn't enough, we have to build stuff with lateral forces in mind.
We even have "seismic zones" each with it's own level of extreme structural engineering.
Pipe racks?........fagataboutit. High bay's,....... they hold the rest of the roof up. "SUSPENDED Xfmrs.? Yeah, with 360 degree lateral bracing, and X10 vertical support. We usually go to an exterior wall. Our troffers get 4 corner hospital wrap ceiling wires. (they hold the grid up) Do you guys have to get your vertical anchors pull tested? AND certified?
Sorry if I came off as a "one of them" kinda jackasses, (I was doin' better since I don't do service anymore).
Peace.
Thanks for the post...sometimes they require structural calculations to be submitted for approval if suspended above the floor.