nameplate confusing

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petersonra

petersonra

Senior Member
Location
Northern illinois
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Semi-retired engineer
So this is part of a nameplate on a chiller.

Is this nameplate suggesting the use of paralleled #1, 2 and 3?

Can you use the 90 C column for this?

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I would think that the termination ( lug) would have to be rated at 90 deg, most are all 75deg

The 90 deg rating may even be the wrong listing on the nameplate.
 
nizak said:
The 90 deg rating may even be the wrong listing on the nameplate.
Click to expand...

Most likely the conductor insulation needs to be 90C rated, but applied using the 75C column.
This is very common.

Manufacturer's nameplate often provide information base on their 'listing' rather than any specific electrical code.
 
jim dungar said:
Most likely the conductor insulation needs to be 90C rated, but applied using the 75C column.
This is very common.

Manufacturer's nameplate often provide information base on their 'listing' rather than any specific electrical code.
Click to expand...
You seem to be implying that the manufacturer can tell you to install a branch circuit that does not comply with code.
 
texie said:
You seem to be implying that the manufacturer can tell you to install a branch circuit that does not comply with code.
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No. Not at all.
The manufacturer can tell you the information they used to get their listing. It is up to the installer to follow the applicable codes, be they national, local, or job specific.
 
Yeah. There's something wrong here. Can't parallel wire smaller than 1/0 and the 90 degree selection is likely wrong. I guess there listing could require 90 deg c wire but run it at 75 but that's not what there chart shows
 
texie said:
Maybe we are not on the same page. I'm referring to the chart that says to use conductors smaller than 1/0 in parallel.
Click to expand...
I am saying that the chart may have been what the manufacturer used to get their listing and so may really only apply to their internal wiring.
 
If that is a listed product, I would send it to them and ask about it, especially if the listing agency is UL. since they have published statements that say they review all of the manufacturer's information about the product and that all such information is to be considered a 110.3(B) instruction.
 
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