Isn’t this Square D electrical panel enclosure supposed to have grounding conductors connected to an attached, dedicated bus bar?
Yes if wire type equipment grounding conductors are present in the panel then an equipment grounding terminal bar is required.
408.40 Grounding of Panelboards.
Panelboard cabinets and panelboard frames, if of metal, shall be in physical contact with each other and shall be connected to an equipment grounding conductor. Where the panelboard is used with nonmetallic raceway or cable or where separate equipment grounding conductors are provided, a terminal bar for the equipment grounding conductors shall be secured inside the cabinet. The terminal bar shall be bonded to the cabinet and panelboard frame, if of metal; otherwise it shall be connected to the equipment grounding conductor that is run with the conductors feeding the panelboard.
Exception: Where an isolated equipment grounding conductor for a branch circuit or a feeder is provided as permitted by 250.146(D), the insulated equipment grounding conductor that is run with the circuit conductors shall be permitted to pass through the panelboard without being connected to the panelboard’s equipment grounding terminal bar.
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The National Electrical Code (NEC) requires subpanels have separate neutral and equipment grounding termination bars.
It does? Do you have a code reference?
I think NEC 250.32(B)(1), all sub-panels require separate neutral and equipment grounding termination bars . These bars must be separated in order to isolate the grounded conductors’ “neutrals” from the equipment grounding conductors and metal cabinet.
Look at post #2.
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Sorry Robert. I stand corrected.
No need to apologize. In most cases there will be a wire type EGC in the panel so as you’ve stated the EGC bus is then required. There is the increasingly rare cases where only the metal raceways or cables are the EGC and with no wire type EGC’s the EGC bus is not required.
So for the most part you should always see the separate egc bus in a sub-panel but there are scenarios where it is not required.
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Thank you, @rmeier2 ! Very helpful.
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You’re welcome. It’s a good question. 
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