Just for info, the breakers are all 15 amp, except for the one on the bottom left, which is a 20 amp GFCI breaker, although that doesn't appear to be connected on the other end, so might get removed in the new panel.Īlso, I will most likely upgrade all of the 15 amp breakers to AFCIs, considering they're all associated with bedrooms (yeah I know that's a lot of outlets and lights :D). I would agree with you 100 but my AHJ has pulled that card because the plans were not specified or no load data was provided, the same AHJ has approved a 100 amp panel with 10/3 w-g for the same reason we always say go big with the sub or go home, you can always up size the wire but it has to be based on load calculations that are smaller. Seems hard to find that kind of wire, though. Generally, the wire that is suitable to run a 100amp subpanel is 4 copper wires or 2 aluminum wires. So when I get the new panel (), does that mean I'll have to wire a ground wire from the main panel? If so, what AWG? Since this is 70 amp, I'm assuming 4 AWG. On top of this, we have to increase the amps by 20 to get the true size wire for 200 amps at such a distance: 200 Amp Wire (100 ft away) 250A × 1. We already know that such a circuit will require wires with at least 250A ampacity. It appears that the neutral (the bus on the left) and ground (the bus on the right) bus are connected. Example: Let’s say you want to use 200 amp service 100 feet away from the sub panel. One of the things I have noticed first of all is that there is no ground wire. That was the concept behind Rule of Six panels. Mind you, a 60A breaker is ten bucks, its the 70+ amp breakers that start to get expensive. I decided to take a look at the sub-panel (since I was considering updating it to a newer one), which is running off of a 240 volt 70 amp breaker on the main panel and appears to be a Siemens ITE from around the 80s or early 90s, and this is what I found inside (sorry for it being blurry): And yeah, if your main panels main breaker is 100A, and your feeder wire is adequate size for 100A, then you do not need a second breaker protecting the feeder, the main has that effect. Can you feed a 100 amp sub panel with a 50 amp breaker The 100A is the highest possible rating. To determine the appropriate gauge size, you can use the Wire and Cable Size Calculator. The run to the garage, lug to lug is 65 and I have to bury the cable to meet code and am going to put it in Sched 40. I plan to install a 100 AMP circuit breaker in the house panel. Im wiring a 100 AMP garage sub-panel from a 200 AMP main in my house. The other day, I was thinking of a few electrical 'improvements' to my home. Always utilize the proper cable and wire sizes, as well as the appropriate outlets and switches, and circuit breakers. Ive checked a number of the other questions but not finding the specific answer I need.
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