RiseFromYourGrav
Member
- Location
- Chicago, Il
Hello everybody, I'm new here. This is a bit more of a UL question than a NEC question, but it's a bit of both.
I work at a small Panelboard & Switchboard manufacturer, and we have two UL labels for out panels: "Panelboard" and "Class CTL Panelboard". I was told that if at least 10% of the circuits in the panel consist of 1P or 2P 30A or less CBs, then we use the CTL label. I looked in our UL 67 for confirmation on this some time ago and stumbled across a passage that states that no Lighting and Appliance Panelboard may have more than 42 circuits. Another UL document mentions that the power panelboard and lighting appliance panelboard distinction was done away with in the 2008 NEC, so it's more of a legacy thing in UL 67 and we can put as many breakers as we want. My question is, from a marking standpoint, are we okay to use that Class CTL label on a panel with 84 circuits? Even if it's a legacy thing, I would think that that label would adhere to the old definition as that is the only definition of Lighting and Appliance Panelboard in UL67. My other question would be what the point of that label is if the distinction is removed from recent NEC entries (I'm assuming it's for areas still on old NEC?).
Any help is appreciated.
Thank you.
I work at a small Panelboard & Switchboard manufacturer, and we have two UL labels for out panels: "Panelboard" and "Class CTL Panelboard". I was told that if at least 10% of the circuits in the panel consist of 1P or 2P 30A or less CBs, then we use the CTL label. I looked in our UL 67 for confirmation on this some time ago and stumbled across a passage that states that no Lighting and Appliance Panelboard may have more than 42 circuits. Another UL document mentions that the power panelboard and lighting appliance panelboard distinction was done away with in the 2008 NEC, so it's more of a legacy thing in UL 67 and we can put as many breakers as we want. My question is, from a marking standpoint, are we okay to use that Class CTL label on a panel with 84 circuits? Even if it's a legacy thing, I would think that that label would adhere to the old definition as that is the only definition of Lighting and Appliance Panelboard in UL67. My other question would be what the point of that label is if the distinction is removed from recent NEC entries (I'm assuming it's for areas still on old NEC?).
Any help is appreciated.
Thank you.
