Apr 17, 2012 · Hello all - This is my first post. We have a 1969 vintage building with (17) 480V 3PH panels for lighting. Many of these have been reworked over the years leaving circuit …

Jul 11, 2023 · We have an upstream Panel A which is going to feed a new panel B location that was previously just a tap block used to distribute branch circuits. Because of existing …

Aug 5, 2006 · The sheetrock patch shouldn't be your problem since you didn't cut the hole, but....the trick is to slide a short (7" to 1') piece of wood lath into the hole, line it up horizontally …

Nov 3, 2015 · I forgot your other question. Since cut-in boxes are not an option for existing walls, we would require a larger than the box opening next to a stud and patch in a piece of drywall …

Feb 21, 2025 · It is much more cost effective to just have a control panel manufacturer who is already authorized build it and apply the ul label. It is also far less likely that your design will be …

Jun 5, 2006 · Bryan, you could use 90.7 to reject the cut in boxes in the fire wall. The Fire Wall is a most likely a UL assembly, so using anything in this wall that specifically has a UL …

Jan 24, 2012 · Also a wire underneath has insulation damage. Thank you for your help. Southwire guys say tape is fine to repair NM sheath. They even go so far as to say if you think you have …

Aug 8, 2003 · What do you think about this section that I would like to see added to the 2005 NEC, or how would you revise it? 110.3. Unused Electrical Equipment: Unused electrical …

Mar 2, 2024 · I know that Elec Distribution Equipment (Panelboards, Switches etc.) have a life expectancy of 50-70 years, depending on installation conditions. This is based on information …

Apr 1, 2014 · If not, you can locate the studs and drill a drywall plug with a 2 1/2" hole saw then a 1 1/2" hole into the stud with a spade bit deep enough to get your wire in, get a nail-on plate in …