metal wire gutter conductor ampacity

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farmaped

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Location
PA - USA
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Engineer
Are there tables available for auxilliary gutter (366) or metal wireway (376) conductor ampacity? (Keeping cross-sectional area conductors sum under 20% - no deration)
The way I see it now is two options:
1. Table 310.16 (probably conservative)
2. Engineer Calculation 310.15(C)
Just checking.
Thanks in advance.
 
Ok I will re-phrase my question to:
"Why can't I read Table 310.16?" After further review it is clearly the ampacities to use in aux. gutters applications.
I have an application connecting 3000Amp transformer to close switchgear. I plan on using DLO/RHW-2 cable with the correct terminations. After searching this site I am impressed with the information out there on this topic.
This site is great.
 
Table 310. 16 Is Used For The Ampacity Of Conductors Before Adjustment Or Correction Factors Have Been Applied. ( Derating Conductor Fill, Temp Etc. ) Per Art. 376.22 A Metal Wireway Shall Not Have A Conductor Fill Of More Than 20 Percent Of The Interior Cross-sectional Area Of The Wireway. As Far As Derating The Conductor Goes If You Have Less Than 30 Current Carrying Conductors There Is No Derating Required. Use Caution Nonmetallic Wireways The 30 Current Caarrying Conductor Derating Factor Does Not Work. Use The Derating Factors In 310.15(b)(2)(a)
 
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