125 amp 208 3 phase panel fed from 100 amp fuses.

I would think you would find a 75C marking for the terminals at each end, or maybe 60/75. That last one can be confusing but I believe it allows you to use it at 75C but doesnt require 75C wire if the current keeps it to 60C. Having wire limited to 60C isnt much of an issue anymore since most is now 90C.
 
Thanks for the info about the 60 degree terminals. I remember hearing about that but it has been quite a while. Al luck would have it, the one panel that I have on hand has terminals that are not marked with temperature, only the wire size(2/0-#14). I guess I will be buying a different panel.
The difference in wire size and conduit will be worth it.
 
steve61 said:
Thanks for the info about the 60 degree terminals. I remember hearing about that but it has been quite a while. Al luck would have it, the one panel that I have on hand has terminals that are not marked with temperature, only the wire size(2/0-#14). I guess I will be buying a different panel.
The difference in wire size and conduit will be worth it.
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Isn’t there a label in the panel?
How old is that panel?
 
steve61 said:
the one panel that I have on hand has terminals that are not marked with temperature,
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You can not use the temperature rating of the lug itself. You must always use the rating of the complete termination/assembly, which means that of the overall equipment.
 
Seven-Delta-FortyOne said:
Is it an Eaton panel?

I will never understand why they do this, but they ship their MLO panels with a bonded neutral bar and no ground bar.

The situations where this might work are so infinitesimally small that it’s not worth noting. So you must purchase a separate ground bar and unbond the neutral bar.

Even their panels with an MCB ship without a ground bar.
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We use emt and AC cable so don’t get g bars. Inspektor one time asked me to remove (not used) g bars because the next ‚electrician’ will connect neutrals there.
 
don_resqcapt19 said:
The code changes in the 2020 code pretty much prohibit the use of a MLO panel as service equipment. The product standard has been changed to reflect the requirements in the NEC.
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What code change prohibits using an MLO panel? I used to do that in the past when I had to install a new panel to replace an old 60 amp service panel (common in multifamily dwellings). I would install a 60 amp breaker and the factory hold-down kit as well as the green bonding screw through the neutral bar.

This can’t be done anymore?
 
steve61 said:
Thanks for the info about the 60 degree terminals. I remember hearing about that but it has been quite a while. Al luck would have it, the one panel that I have on hand has terminals that are not marked with temperature, only the wire size(2/0-#14). I guess I will be buying a different panel.
The difference in wire size and conduit will be worth it.
Click to expand...
Unless you're using 40 year old equipment I would forget the 60° C rating. Anything new will be 75° C. Size the conductors according.
 
JohnHess said:
What code change prohibits using an MLO panel? I used to do that in the past when I had to install a new panel to replace an old 60 amp service panel (common in multifamily dwellings). I would install a 60 amp breaker and the factory hold-down kit as well as the green bonding screw through the neutral bar.
Click to expand...
In this case you have installed a Main Breaker panel.
 
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