Questions tagged [subpanel]

For questions about an [electrical-panel] that is fed from another [electrical-panel] instead of being fed directly by a utility service or separately derived service (such as a generator or inverter).

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1answer
46 views

What size wire and breaker do I need for my shed/workshop?

I am looking to run electricity to my shed and I am unsure of what size wire and breaker I need. My main panel will be about 100ft away from my shed. My shed is 12X20 and I want to install 6-8 4ft 4 ...
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1answer
52 views

Can I Install a Sub-Panel from an Existing NEMA 5-50 Plug?

I have a NEMA 5-50 outlet wired from my main panel all the way down to where I am installing a garage. It was put in by the previous owner for a welder I believe. NEMA 5-50 is quite unique and hard to ...
3
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1answer
93 views

adding new circuit to generator subpanel without a ground bar

I have a main Square D panel with a post-installed Generac (Siemens) subpanel with automatic transfer switch to standby generator. I want to add a new 15A circuit to the subpanel so I can move a ...
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2answers
47 views

Can I use a well pump cable to supply a sub-panel?

I have a pump cable (red, yellow, black, green) going from my house (in buried conduit) to my garage. It comes from a 200 amp service box on a 240v 30amp breaker. Previous owner was going to put in ...
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2answers
72 views

Installing Outlet for Welder; Possible Dual Use for RV

I'm doing some electrical upgrades to my garage/workshop with upstairs apartment; I'm going to be replacing its 1960s-vintage subpanel which is fed by #4 wire from a 200 amp service entrance panel (on ...
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1answer
56 views

Can I reuse the aluminum feeder wire when I replace a sub-panel?

I'm rewiring my 1957 house because there was no ground. I have a main panel and a subpanel in the crawlspace that currently only give power to the gas furnace. I want to add the air conditioner on the ...
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1answer
36 views

Is a sub panel necessary to wire this 10.5kw 43.75amp sauna heater?

We're planning on installing this Harvia Cilindro 10.5kW Electric Sauna Heater (Model HPC11-U1H) when it gets here. The manual wants us to put a 50amp breaker in the main panel, and then run that to ...
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0answers
34 views

Subpanel with no main disconnect or panel

I am a home inspector and have come across this subpanel in the garage. There is no main disconnect panel or breaker found anywhere on site inside or outside. The home was built in 2016. Why is ...
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3answers
258 views

Adding critical-loads sub-panel with a PV install, rationale and ampacity calculation

I'm considering adding a critical-loads subpanel near my main load center, in conjunction with a small grid-tie solar system, and with connection for backup power. Please critique my rationale for ...
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2answers
59 views

Trying to find a way to shut the power off in the detached garage without having to go back to the house to turn off the breakers

Each wire is already ran and hooked up to lights and outlets it was ran underground with pvc in to the detached garage
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3answers
62 views

Does the ground bar on a subpanel need to be bonded to the subpanel?

I had a lightning strike near my house that damaged the electric in my shed and now I need to replace the subpanel. I have a question about the groundbar. In the subpanel I am replacing the grouond ...
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1answer
73 views

Grounding for sub panel breaker

We have an old cabin with 4 fuses in the main 60 amp panel, and a sub panel with a handful of breakers. The sub panel is fed by 3 wires instead of the modern 4. The 4 fuses are all wired with 2 wire ...
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1answer
37 views

Can I hook up a subpanel to an existing 220 line that isn't in use?

When our house was built, they put a 220 line in for future pool equipment. The pool equipment ended up going on the other side of the house, so this line just terminates in a box unused. I want to ...
3
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2answers
287 views

What are my options for running cable from surface-mount sub-panel in garage?

I'm building a new garage, mostly on my own. I hired an electrician to run cable and install a sub-panel, which was completed yesterday. Today it passed inspection. Next step is running cable for ...
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0answers
28 views

is it expensive or necessary to relocate the sub panel from my bathroom to another room in my small condo?

My inspector stated it was an area of concern that my sub panel is located in my bathroom and should have it relocated to another room due to possible moisture getting in; Is this something I should ...
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0answers
29 views

Shed Electric help

I just built a shed. I have extra 10 Awg wire given to me. I would like to run 3 wires of 10 gauge to my shed (all i have left) and use a 30 amp breaker. Do i need to put a 30 amp service in to ...
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1answer
82 views

Can I use an insulated ground wire in a sub-panel?

I'm running a new sub-panel to my basement (the main panel is in the garage). I bought a 500' spool of 6 AWG THHN. The distance to the sub-panel is about 110' so I cut the spool into 4 x 125' lengths. ...
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1answer
96 views

How should I terminate this wiring and install a new outlet?

We bought a house with a old main panel and previous owners installed a sub panel in the garage they also had two very large dryer size outlets one in the wall and as expected and one nailed to a 2x4. ...
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1answer
60 views

sub panel issues

I am adding a 50 amp sub panel to my shed. I am using thwn 6 awg wire in pvc conduit 2 hots 1 neutral 1 ground. I have installed a ground rod to sub in shed also. Here are the questions I have conduit ...
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1answer
51 views

Is grounding the subpanel not required some times

Is the sub panel properly grounded, only Load and Neutral wiring were located at the sub panel as shown below. This Sub panel is at a single floor Condo, built 1970, Updated with Newer Electrical ...
2
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1answer
83 views

Bought a new (old) house and a new subpanel for the pool was installed. No clue if this is safe

I bought a house and prior to the sale a subpanel was installed at the pool area. The home inspector says it’s fine, but he really wasn’t there to make sure things are code compliant. Before I hire ...
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0answers
37 views

Voltage detector goes off for no reason

Circuit at breaker box is 30amps. Ground is free standing not connected to neutral or ground bar. The outlet is removed presently with no wires touching each other or anything else near the outlet box....
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2answers
64 views

30amp 2 breaker sub panel

Hooking up power to a shed only going to have a few receptacles and a light. I have 30 amp power close by where I use to use for a camper it’s only run off of 120 with 3 wires my question is can I use ...
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1answer
71 views

Running wire for new subpanel in garage, how to best utilize existing wiring considering the scope of my project?

I have a 200amp main panel in my home, and my garage has a subpanel fed by a two pole 50amp breaker by approximately 85' of 6/3 plus ground cable. I use my garage as a workshop, greenhouse, and office....
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1answer
39 views

Adding sub panel in my basement

I want to install a sub panel in my basement directly below my kitchen. 44 foot run to the main panel. Can I use 6/4 SOOW wire instead of AWG? This panel will eventually have a transfer switch on it ...
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2answers
86 views

Can a subpanel's ground and neutral be served from another subpanel, while the circuits come from main panel?

I am adding an addition to my house, and running a new 100A subpanel over to the main part of the house. In the house I have the main 200A panel, plus an existing 100A subpanel, and the two are right ...
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3answers
1k views

Are the grounds and neutrals in this electrical subpanel reversed?

I would appreciate your feed back to help me understand the logic behind Bonding the Neutral and Isolating Ground as shown in the attached pics. Subject sub panel is dedicated to one of four ...
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1answer
25 views

I just got a 12 x 18 foot utility shed, 120' from main 200 amp panel. What size subpanel should I use?

I want to wire a 12'x18' utility shed 120' underground in PVC from a 200 amp main panel. The shed will power a refrigerator, freezer, small 115 volt 8000btu window AC unit, LED shop lights (3), and ...
2
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1answer
49 views

Subpanel feeder cable type to code?

Pardon my uneducated question, new to the codes...in short I want to add a subpanel, along an existing one. Here is the setup: There is a 200A service with a main service breaker and branch-breakers ...
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2answers
58 views

Grounding requirements for multipanel, multiservice installation

Overview: My question ultimately boils down to figuring out how many wires I can properly stuff down an existing conduit. There are many questions pertaining to wiring and grounding sub-panels, but I'...
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1answer
57 views

Subfeed Lugs for GE Powermark Plus Loadcenter

Do plug-in subfeed lugs exist that are rated for use with a GE Powermark Plus loadcenter? I have a circa 1980s TM2020R Mod 1 loadcenter that is fully populated with THQP breakers and was planning on ...
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2answers
22 views

Have four-conductor feed at detached garage subpanel, how to verify the ground?

I'm currently rewiring my new-to-me detached garage. Garage is from the 70's but has a newer Siemens panel (previous owners added a hot tub). The feed from my service panel is a sheathed 4 conductor ...
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1answer
48 views

Paid an Electrician to install Sub-panel.. & Ground wire question

A couple of years ago, I was needing a sub-panel in my garage. While I intended to do it myself, shoulder surgery precluded me from being able so I hired a local, licensed electrician. He did a ...
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0answers
34 views

Sub panel 3 wire and 220Volts

My mom just bought an old house (1917). The Main Breaker has 3 wires two hot from a 30amp 220 breaker and one ground going from the main into a sub-panel, there is no room to feed a 4th neutral wire. ...
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0answers
24 views

Breaker to Sub-Panel keeps tripping

I have a 30 amp double-throw breaker in my main panel that feeds a sub-panel in my shop. A few weeks ago, one of the 2 circuits in the shop stopped working. Then, a few days ago, the breaker in the ...
9
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3answers
1k views

Running electrical to a shed

I have a shed in my backyard about 200ft from the house. I would like to run electrical to the shed to install 2 or 3 power outlets, and two LED lights for the inside. Currently from the house to ...
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3answers
99 views

Electrical box caught on fire

A sub panel caught on fire just in the garage area. Do I need to rewire the whole house or can I just get a big junction box and splice all branch circuits and run it to my new electrical panel ?
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1answer
25 views

Sub panel in seperate structure

I am installing a sub panel in my shed about 100 feet away from house. I am using a 50 amp breaker with 6 nhhn wire. Can i use a grounding rod to ground instead of running wire back to main. And do i ...
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1answer
55 views

Electrical sub panel grounding

I am concerned about improper / unsafe condition(s) that I noted at the house’ s electrical sub panel. House that was built in mid-late 1960’. The main panel and the sub panel are older, likely when ...
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2answers
59 views

Running 2nd sub panel from 1st sub panel

I have a 200amp main panel running the house, I added a 100amp sub panel(#1)to power my finished basement,I installed a 100amp breaker in the main panel and ran aluminum feed to power the sub panel#1. ...
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2answers
100 views

Running 240v circuit to detached garage

I am trying to determine the best way possible to get a 240v outlet to my detached garage approximately 25' from the breaker panel inside the house. I currently have 2 separate feeds to the garage ...
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2answers
90 views

Garage subpanel wiring

I recently bought a house that has a subpanel in the garage served by a 50 amp circuit from the main breaker. The breaker has 4 wires coming in: red, black, green, white. Currently, the subpanel ...
3
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1answer
89 views

Contractor wants to “derate” my subpanel

We're going through the planning phases of installing a pair of Tesla Powerwall units for our house. We got this via the project contact from their engineering group. Both Tesla Powerwalls are ...
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0answers
31 views

Workshop subpanel with possible solar backfeed

Needing to run power from the residence to the workshop. the need is 220v for the welder in addition to overhead lighting, the run is 375'....what wire and conduit size is needed? If in the future, ...
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1answer
108 views

How do I run wiring to a shed?

I have a building that will be powering 4 shop lights and 4 outlets. Things that are plugged in are air conditioner 110v 5000btu, radio, occasionally air compressor, other power tools(nothing big), ...
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1answer
72 views

Subpanel for finished basement: sizing, cable, installation advice

Thanks in advance for advice! I just finished framing my basement and am moving on to electrical. Hoping for advice on the subpanel. Main 200A Eaton panel is in the garage. I'll need to run cable ...
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1answer
51 views

URD 1/0 wire for 100amp subpanel 60' away from main box

Can I use URD aluminum 1/0, 1/0, 1/0, 4 wire to run a 100 amp subpanel approx. 60' away from my main box? I plan I running it through my attic which in Arizona can get very hot in summer time if ...
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2answers
61 views

Termination point at main panel for a 4 wire feeder ground wire to sub-panel in detached structure

I plan to upgrade an older 40 amp 3 wire feeder to my shop to a safer 4 wire feeder. No issues at all running a #6 solid copper in existing conduit to an un-bonded ground bus-bar in the sub-panel. ...
2
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1answer
244 views

Bizarre home electrical system

This is a follow up to a question I asked recently about a subpanel that was not wired properly. I'm working on an extremely bizarre situation with the electrical system of an old house that predates ...
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2answers
46 views

Adding a garage subpanel

Currently I have a 200-amp main panel located in the basement. I would like to install a subpanel in the garage. I will use to power my electrical tools, heater, and PC. The garage is part of the ...

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