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Old 02-18-2020, 03:38 PM   #21
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I’m glad things are working out for Brad now

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Old 03-06-2020, 07:13 PM   #22
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Some more progress on this project. These are the panels that transformer is feeding. They wanted the wall the panels are mounted on tiled, so I installed shallow strut on plywood backing before drywall, so that it would be easier to mount the panels after the tile went on. The strut ended up flush with the tile, so it worked out pretty nice. The cables coming off the secondary of the transformer come up through the floor into the big panel on the left.

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Old 03-06-2020, 07:16 PM   #23
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And this is what we did the last couple of days downstairs, mounted the disconnect, ran and terminated the primary cables, and ran the secondary cables. The photo doesn't show the scale very well, but those secondary cables are 4 conductor 750 kcmil aluminum. The cables draped across the front are currently feeding the temporary panel in the renovation space, they will be reterminated in the main electrical room to the 600v section of the switchgear, and will be rerouted into the disconnect in this photo to feed the transformer primary.

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Old 03-06-2020, 07:39 PM   #24
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Looks great!

Sent from my new phone. Autocorrect may have changed stuff.
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Old 03-06-2020, 09:17 PM   #25
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Looks good. Great job.

The first post with the chain hoists reminded me of a company I used to work for that would expect us to get stuff done with absolutely nothing to do the job with. We had to move service equipment around before with nothing more than couple of chain hoists and a half of pack of Marlboro lights...and that is pretty puckering experience, when no one knows what the heck their doing and we're all just winging it.
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Old 03-06-2020, 09:30 PM   #26
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What brand gear are you using? That panel on the left looks deep.
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Old 03-06-2020, 10:18 PM   #27
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What brand gear are you using? That panel on the left looks deep.
The panels & disconnect are Siemens, and I believe the transformer is Hammond. The big panel is 13" deep.

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Old 03-07-2020, 01:55 AM   #28
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I bet manhandling that 750-4 was tiring. It's been a while since I've gone over 500 kcmil. Even that is an ass kicking sometimes.
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Old 03-07-2020, 12:42 PM   #29
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I bet manhandling that 750-4 was tiring. It's been a while since I've gone over 500 kcmil. Even that is an ass kicking sometimes.
Yeah my apprentice and I were pretty exhausted. I came home and had a hot Epsom salt bath and took a muscle relaxant.

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Old 03-07-2020, 03:02 PM   #30
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I used a 1/2" wedge anchor embedded about 4 - 5" inches into the concrete ceiling, with a rod coupling and a lifting eye. I also had two 1/2" wedge anchors drilled for the vertical rods to pick up the front corners of the rack once installed. During the lift, I attached lifting eyes to these anchors and hung a second chain hoist from them just as a secondary support. At one point we had to re rig the primary hoist and while doing that the secondary took all the weight, and in the process the anchors bent inwards about 45 degrees. So when the lift was complete and the transformer was bolted to the wall, we drilled new anchors alongside the first ones and hung the vertical rods from them.

Was that scary enough that you needed to check your shorts???

Even if the engineer said it was good enough?


Looks like that was a pretty tight fit, lifting that close to the ceiling, with a ratcheting type chain fall, from above.


Some nice looking work. Any photos of the transformer interior, of how you got those 3x parallel 750's stuffed in there in that tight corner?
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Old 03-07-2020, 05:18 PM   #31
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Was that scary enough that you needed to check your shorts???

Even if the engineer said it was good enough?


Looks like that was a pretty tight fit, lifting that close to the ceiling, with a ratcheting type chain fall, from above.


Some nice looking work. Any photos of the transformer interior, of how you got those 3x parallel 750's stuffed in there in that tight corner?
I was pretty comfortable with it. It got a little hairy at the end when I realized we needed to adjust our rigging to get it just a little higher; we let all the weight onto the backup hoist to adjust the main one, and when we did that the two anchors holding the backup bent inwards about 45 degrees. I was planning on using those anchors for the vertical supports at the front, so we had to re-drill those a little to one side after the lift was done. Felt a lot better once we got the weight back on the main hoist, and better still once the first couple of wall anchors had nuts on them.

I haven't terminated the secondary cables yet, when I do I'll get some better pictures of where they enter the transformer. I would have liked to mount the transformer a foot further to the left to give myself more room to bend, but I couldn't because then the bottom would have been lower than the posted clearance for the parkade. I have to keep 300mm (12") clear above the transformer by code so that governed how low the bottom had to be.

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