100 amp sub panel with #2 aluminum? - Electrician Talk
2019年8月5日 · 434 posts · Joined 2012. #15 · Aug 5, 2019. This is for a sub panel going to an attached garage. The panel is an older Commander. The 90 amp Commander is about $250 whereas a 100 amp Commander breaker will run be about $100. I would have to run #1 aluminum to use the 100 amp commander though as opposed to #2 for 90.
Interpreting 2020 NEC 705.12 (B) (3) (2) ie 120% rule
2021年4月30日 · 200A (sub panel) x 1.2 = 240A the solar back feed breaker can only be as big as 40A at the sub panel. I don’t know how big the main panel is, but the same 40A plus the breaker feeding it has to be less than 120% of the bus rating of that panel also. The 40A has to be figured into every panel all the way back to the service.
125 amp breaker feeding and sub panel with a 200 amp main
2018年1月11日 · One is a 200 amp breaker feeding a sub panel for the main house. The other is a 125 amp breaker feeding a DADU (detached mother in law). The DADU is going to have solar panels. The solar guys want at least a 150 amp rated bus on the DADU's sub panel. Because this is a detached building it needs a main breaker.
Is #2 Al allowed for a 100 amp sub panel? - Electrician Talk
2018年6月20日 · eddy current. 8714 posts · Joined 2009. #12 · Jun 20, 2018. A service can use table 39 that allows #2 aluminum because it is a non continuous load. A sub panel is considered a continuous load so you must use #1 aluminum as per table 4. …
voltage imbalance in a sub panel - Electrician Talk
2017年10月10日 · 7 posts · Joined 2017. #1 · Oct 10, 2017. I have a out building with a sub panel. The panel is fed from the main panel with a 60A breaker and a 3 wire setup. At the sub panel I get 220v between L1 and L2. I get 120 between L1 and neutral and 120 between L2 and neutral. All looks well. This is with all the breakers off.
Sub-panel backfeed breaker (no generator, no solar)
2023年11月1日 · Sub-panel backfeed breaker (no generator, no solar) I'm going to be adding a small sub-panel. The job should be straightforward. The sub-panel is in the same structure as the main panel, so the sub will rely on one of the breakers in the main panel as it's main breaker. The sub-panel itself will only hold three breakers. Simple. Except one twist.
100 amp breaker feeding 200 amp subpanel??? - Electrician Talk
2017年6月29日 · No, no problem at all. FWIW, you don't need a main breaker in the subpanel. It doesn't matter whether it's there or not. You can feed a subpanel with any amount of current up to it's maximum rating, which is 200A in your case. directwholesale, circuitman1 and MechanicalDVR. Reply Like.
Main Circuit Breaker in Sub-Panel (Again) | Page 2 - Electrician Talk
2009年10月2日 · NEC Code Forum. Main Circuit Breaker in Sub-Panel (Again) Tags 225.32
2 Ground bars in a panel - Electrician Talk
2019年3月27日 · 616 posts · Joined 2017. #1 · Mar 27, 2019 (Edited) Lets say you have 2 ground bars in a standard residential panel. One bar is on the even side and another is odd side. Both are secured via machine screws to the panelboard. One bar has the ground ran with the feeders attached to it. Do you need to run a jumper to connect the ground bars ...
60 amp sub panel questions - Electrician Talk
2023年8月15日 · All of the panels I have seen have some way to remove the neutral bond to use as a subpanel. Some have a strap, some have a screw. Some of the screws are obvious, others look like mounting screws. From my supplier: 6/3 NMD90 is $15.98/m. 4/3 ACWU (aluminum) is $10.42/m. They also carry 4/3 NMD90 (aluminum) at $8.41/m.