subpanel feeder sizing --- again | Electrician Talk
2019年3月17日 · If the subpanel is feeding an entire dwelling unit, such as an apartment, then you can use #2 for 100A. But if it's just a random subpanel, then #2 is only good for 90A, which is what I use. If you really need that extra 10A, then you would have to use #1. I have never installed a 125A subpanel so I don't know the size off the top of my head.
Subpanel addition with gen transfer switch... - Electrician Talk
2024年10月28日 · The subpanel will have the well pump and 3 circuits currently fed from the main panel which I want to be able to feed with backup power. The well is a 30amp/240v circuit and the other 3 are 15amp/110v.
Subpanel with no ground bus - Electrician Talk
2017年3月30日 · The only bonding connection to this subpanel from the main is the BX metal sheathing as far as I can tell. The various branch circuits on the sub all show decent ground connections. And yes, the 1973 build date is verified and there is even a 1973 township inspection sticker on the main panel.
Grounding & Bonding of 3 Wire Fed Subpanel | Electrician Talk
2020年7月18日 · Grounding & Bonding of 3 Wire Fed Subpanel Auxiliary buildings should have the EGC extended from the main building. The barn panel neutral should not be bonded. It also needs a ground rod. Power supplied to detached buildings is considered a feeder when supplied from a main or sub panel.
Single phase subpanel from Three phase panel - Electrician Talk
2018年12月20日 · Hi all, I am working on a price for a commercial office area, the old 3phase panel is full and I need a new subpanel for the supply of 2000sqft of office space. There is no heavy loads, its basically:5 circuits for receptacles, 1 …
Grounding 3-wire subpanel - Electrician Talk
2017年9月27日 · Boxes are tied together and to the subpanel box, which is tied to the neutral bus. Replacing it all with new romex and adding grounds to circuits, bringing all branches up to code, AFCI, etc. The main service was upgraded by others a few months back when homeowner bought an electric car, needed to up service for the outlet and had it all ...
Sub-Panel Allowable Locations - Electrician Talk
2014年4月18日 · Hello, Im an electrical contractor out of Southern California, we are wiring a new 6000 sq ft custom home. Sub panel locations are limited, to me sub panels in certain locations has always been questionable.
MHF to feed detached garage subpanel - Electrician Talk
2022年4月20日 · I was hoping to get information on running MHF from my house to a detached garage to feed a new subpanel. Current situation: 1. The house was built in 1976 2. I can only assume code was different because 2 12/2 wire was run from the basement crawl space to a distance of about 28ft to the garage to feed an outlet circuit and a light circuit.
Minimum feeder size for a sub panel - Electrician Talk
2020年5月22日 · For this type of thing (like maybe a small subpanel in a basement for finishing a basement or new panel in a garage) 6awg THWN in ENT because it's fast and easy. 60amp breaker in the main and 50A breaker in the sub so that you have the ability to shut the sub panel off to work in it locally and so in theory the sub panel breaker pops before the breaker in the …
Voltage drop calculation when installing sub-panel
2022年7月25日 · Adding a 100a sub-panel to a stand-alone shop on a residential property, where the run to the sub-panel is 120 ft, or 37m, so I'm doing a voltage drop calculation to ensure compliance with 3% drop from main panel.