If they are UL Recognized then I have to used them in a UL listing eligible product? Or, do they simply loose their UL recognition if not incoporated into a UL listing eligible product. UL listed will not loose its listing if used in a non UL listing eligible product?
Can a standard be "recognized" or "listed"? For example, can a breaker be either listed or certified to UL 508?
The bars I am looking at "UL Recognized and CSA Certified for 600 Volts". Am I definitely wrong to think that the neutral ground bar has to be UL 467 listed or recognized?
UL recognizes parts that are intended solely to be incorporated into UL listed products. That is all recognition means. it does not mean you can put it in a UL listed product, or any other product for that matter. UL does not certify components or products. Listed or recognized are the two choices available.
Listed products such as UL508a control panels have a series of requirements that have to be met to meet the listing requirements. That includes what components you are allowed to use within that listed product. The UL requirements for the listed product will tell you very explicitly what component products can be used. Some components will be UL listed, others will be UL recognized. Some are neither. There will be directions in the listing standard that tells you what components can be used and in what way.
I don't know what UL standard your product is being listed to so I cannot tell you with any certainly what components are acceptable.
This is what UL508a says in part about grounding components.
14.2 An industrial control panel shall be provided with a field wiring terminal for the connection of an
equipment grounding conductor. The terminal shall comply with:
a) The component requirements of a field wiring terminal in accordance with Section 28, Field
Wiring; or
b) The requirements in the Standard for Grounding and Bonding Equipment, UL 467.
Table SA 1.1 lays out the parts you can use. I can't cut and paste from it because it is a formatted table and the forum does not allow most formatting.
For paragraph
14.2(a) Recognized Terminal Blocks UL 1059 XCFR2
14.2(a) Recognized grounding bar kits UL 67, UL 891 QEUY2 Procedure described only
14.2(b) Listed Grounding and Bonding Equipment UL 467 KDER
14.2(b) Recognized Grounding and Bonding equipment UL 467 KDER2
What does this mean? Well it means you can use these things for ground terminals for field wiring.
"Procedure described only" means UL has to specifically approve it. In practice it usually means if you pay them they will let you use it.
Just because the ground bar is UL467 (listed or recognized) does not mean it is Ok to use it in a UL508a control panel. It still has to be category code KDER or KDER2.
Most of the UL467 listed stuff I have run across is insanely expensive. I don't recall seeing any that are only recognized.
some ground/neutral bars are UL486 recognized.