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Old 09-02-2016, 02:20 PM   #21
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Hehe yeah I had a similar thing when I was first starting. Customer called in the morning to 'come hook up this new motor' I get there and it's a 200 hp that he wants me to run from a 100 amp load center. So I trace it back to the service to see if there's any open slots... Well it turns out it's only a 400 amp service. That maintenance guy lost his job.

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Old 09-02-2016, 02:34 PM   #22
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Default 100 A 240 V coffee bean roaster

Quote:
Originally Posted by Flyingsod View Post
Hehe yeah I had a similar thing when I was first starting. Customer called in the morning to 'come hook up this new motor' I get there and it's a 200 hp that he wants me to run from a 100 amp load center. So I trace it back to the device to see if there's any open slots... Well it turns out it's only a 400 amp service. That maintenance guy lost his job.

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Why'd they trust someone enough to order the motor but not enough to hook it up? There's no engineering oversight at this place? If the company is as incompetent as it sounds I'm surprised they'd even call a professional like you to wire it when they could just have had the idiot maintenance guy do it. Your story's full of holes and I don't believe you
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Old 09-02-2016, 07:37 PM   #23
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This behavior is actually quite common.

One should ALWAYS move the 'suits' out of the way and deal directly with the tech reps for the equipment to be installed.

This is often easily achieved by merely placing a phone call -- even behind their backs in in their faces.

You need only dial the switchboard and tell the manufacturer's operator that you need to reach the tech rep for such and such a piece of gear that has either been sold or is in the works. The operator will know, or find, the person that counts, completing an otherwise obscure connection that is troublesome to make any other way. Making this very phone call is what is putting the 'suits' off the task.

Modern outfits are getting to the point where you might even engage in a video conference -- from your lap top// iPad to his.

A tech rep LIVES to handle such sales related calls.

The moment any issue turns technical, expect that the 'suits' will drop the ball -- if not actually run away.
Unfortunately, this one is slightly more messy. All the loads are existing and they want to move them to another location in the plan, plus new offices, HVAC, strip heating, etc.

They rejected my request to personally visit the site to get field information, including the existing electrical system and, of course data on the existing equipment. Instead they gave me flaky information, some poor pictures, etc. and expected me to provide construction drawings post haste. Naturally there was no way to do that.

Originally, they wanted the drawings in less than two weeks! That was back in early June.

I could go on but you get the idea.

So far, the design team is "understanding", but who knows how long that will last.
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Old 09-02-2016, 07:47 PM   #24
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In the end, it was a good learning experience. Asked a few questions here and learned about upsizing a vfd (with factory support), making some changes in the motor leads, and voila, now runs on 240v 1 phase. It's a large mixer. Has worked well for several years now.
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