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Thank you to all who have posted thus far. I am using NEC as my guideline for spacing. My last question relates to the wording the NEC uses for spacing requirements. There are two columns in this table under section 408.56 that indicate different spacing requirements. One pertains to "opposite...

I believe what I need to be referencing is the following from the NEC: 408.56 312.11a UL should only apply if the enclosure were to be UL certified and needed to carry that label. Someone please correct me if I'm wrong.

I can do you one better. Check out the attached document. Has some screen shots of my modeled up panel assembly and some notes included. Thanks for taking a look!https://files.engineering.com/getfile.aspx?folder=81b24cd3-3c18-43bd-aaf4-73aeb2100736&file=enclosure_bus_bar_spacing.docx

xnuke, We have used distribution equipment that carries the NRTL listing on similar projects. But the NRTL listed items we'd be looking to use for this project actually carry quite a hefty price tag. I can only imagine what the price would then look like if we were to make inquiries for a low...

Should have specified, I believe I would need to reference table 10.2, seeing as this is in fact a power feed circuit that I'm dealing with

Thanks LionelHutz for the reply! I found this in UL508A in Table 10.1: "Between any uninsulated live part and an uninsulated live part of opposite polarity, uninsulated grounded part other than the enclosure, or exposed metal part. Between any uninsulated live part and the walls of a metal...

Hello everyone! This is my first post on eng-tips, but I've been a long time observer of numerous topics brought up here and have always found this website to be a useful resource. I am wondering if anyone can help me determine the requirements for spacing between bus bars and a panel...