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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46 views

size sub panel needed for mini house

I have 400 amp service in a 3800 square-foot home. I ran 100 amp to a garage. I want to build a mini-home that will require approximately 130amps in appliances, etc. What size sub-panel do I need? ...
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1answer
43 views

Partial Power Outage No Breakers Flipped

Reading other similar posts, I called an electrician friend (doing a favor, not on the clock), who checked the main breaker, it was fine; he checked GCFI's, one wouldn't reset but he said it wasn't ...
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3answers
148 views

Wrong installation of tandem breaker for 240V burn water tank

My contractor installed water tank https://www.homedepot.com/p/Rheem-Performance-50-Gal-Tall-6-Year-4500-4500-Watt-Elements-Electric-Tank-Water-Heater-XE50T06ST45U1/205810674 and it ran for a short ...
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28 views

100 Amp Sub Panel in basement garage from 200 Amp Main in the upstairs garage

I have a two story garage. The bottom garage is below grade on 3 sides. The upstairs garage has its own 200 AMP main service. I will be running wire from the main via 100 amp breaker to the sub panel ...
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2answers
111 views

Can I use 12awg ground from main panel to subpanel?

I recently rebuilt a shed that had electricity run to it in the past. There are wires run from the main panel to the shed underground. The old shed used 12 gauge black, white and green wires. There ...
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1answer
34 views

Adding a Sub-Panel to 3-Phase Main

So our building has 3, 3 Phase 200A 120/208 I-T-E Indoor Load Centers, each on their own meter. Originally the building was built for 3 suites, 3 tenants. We have the entire building, so we have all ...
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1answer
87 views

Replace wire to 60A subpanel

Short Version: Anything wrong with running 6/3 NM in a joist well to a junction box that leads out to a 60A garage subpanel? Longer Version: I'm thinking of finishing a room in my basement. It has a ...
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3answers
91 views

Upstream or downstream breakers for sub panel

I have "recently" created an addition to my house here in CA. The original house had a 200 amp manual transfer switch for a backup generator, but this only feeds the old part of the house via a 100 ...
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1answer
141 views

Confirming the set-up and wiring of 60AMP subpanel

I am installing a 60 AMP sub-panel (GE TLM2412CCUP) and want to confirm the wiring and set-up before I set everything up. The pictures show the main panel (currently 60AMP as well but will be updated ...
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2answers
154 views

Running 100 amp line to detached garage

I found lots of questions about this, but with many different answers. I'm looking to run a 100 amp line from my 200A main breaker box to a subpanel in my new detached garage. The run is about 120 ft....
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1answer
53 views

Wiring a subpanel next to main in finished wall

I'm putting in a 100A subpanel next to the 200A main to add some more outlets for the garage. The walls are finished and the main is flush mounted in the wall so I plan to do the same with the ...
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2answers
324 views

Options for installing sub-panel

we are thinking about the best way to rewire our kitchen. It had 2 circuits when we moved in. We managed to add 2 circuits using an existing 3/4'' conduit that goes from the basement to our third ...
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1answer
73 views

Flush Mounted PVC Electrical Junction Box or alternative ideas to supply two sub-panels

I'm not an electrician, but I am a pretty aggressive DIYer that wants to do things the right way (i.e. I plan on getting a permit and everything inspected but I need a gameplan first). I have a ...
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2answers
79 views

Wiring a shed/workshop

Hoping to wire up a shed/workshop with two 15 amp circuits coming from a 60 amp sub panel beside the main panel. Wondering what type of wire I can use in PVC conduit and if it should be GFCI protected....
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1answer
43 views

New sub panel wire sizes

I would like to install a small sub-panel in my basement. It will be approximately 55-60 feet from the main panel. I will be running a fridge, some fluorescent lights, and occasionally some small ...
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2answers
134 views

Wire a sub-panel to run a pottery kiln, or put a breaker in the main panel?

Pretty beginner on electrical. I have a 100 amp service (metered not against or adjacent to main dwelling - somewhere central in our mobile home court) with a 125 amp main box. 1300 ish sq ft, 3 ...
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0answers
43 views

Run 12/3 through insulated wall to surface mounted electric panel

Should/can I run the 12/3 wire inside the wall or just run a conduit up to the attic? The project: I want to install split receptacle 20 amp outlets in my garage. The subpanel in the garage is ...
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32 views

What wire size is needed?

I need to run 110 volts AC 300' to a subpanel. What size copper wire do I need? Wire will be run in conduit underground.
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1answer
60 views

backup electrical feed to main panel from inverter's GFCI outlet without ground?

I have rigged a 1000watt/120vac inverter to my EV, to use for backup electrical power during short grid outages (the main "traction" battery has 40kwh and the DC-to-DC converter is known to be able to ...
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0answers
57 views

breakers on main panel trip after adding a sub panel

I've just added a subpannel 100amp with Gauge 6 wires to the main panel so that the new subpanel will feed a sauna 25amp + a hot tub 30amp. The sauna is already connected with gauge 8 wires 240V, it ...
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2answers
67 views

Splitting Service Equipment Across Two Enclosures

My house has a 200 amp service with a (circa mid 1980s) GE TM2020R Mod1 panel where all 20 spaces are occupied with THQP breakers. In order to provide room for expansion and to allow for GFCI and AFCI ...
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0answers
35 views

square d q/o sub panel

I had one breaker running kitchen and garage. I used skill saw and it blew breaker. I bought 2 new 20 amp breakers and separated lines. the garage on right side and kitchen on left. everything on ...
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4answers
2k views

GFI outlets tripped after power outage

I live in a rural area that has frequent power outages (Several per month. Less than a minute in duration). When the power is restored, several GFI outlets always trip. I am trying to track down ...
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1answer
56 views

Where do I connect the ground wire of a transfer switch being connected to a sub-panel?

I would like to add a gen-tran manual transfer switch to my electric panel but I live in a condo where the main panel is in an external meter room and my only interior panel I assume is a subpanel. ...
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2answers
82 views

Do I have space in the main panel for a 60 amp double pole breaker?

Completing a workshop in the garage and I've installed a 60 amp sub panel in it for all the garage circuits. I plan on running 6/3 nmd from the main panel to this sub panel (a run of about 15 feet). ...
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3answers
755 views

Federal Pacific 200a main panel problem with oversized 100a 2pole breaker

There is a 200a FPE breaker box (yes, I am aware of all the problems). It is not in the homeowners budget to replace at this time. He has 2 issues: His panel is full His electric furnace is an older ...
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1answer
117 views

30Amp Sub Panel for EV Charger

Need 240V 20AMPs in detached garage for 16 AMP Level 2 EV Charger (Chevy Spark) at my MIL's home. 1200 sqft House, has a 100 AMP Panel. Furnace, Dryer, and Stove are Gas. All circuits are 20AMPs, and ...
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2answers
67 views

Ground Bus Bar on Sub Panel

I was working on a house with a sub panel for a shed/workshop. The sub panel was fed off the house main panel via 2pole 50A breaker. The sub was a load center type with no main breaker. The neutral ...
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1answer
62 views

Can I draw 240v out of this configuration?

This is how my subpanel looks like. I am looking to install a breaker for an AC unit. 20A. The only caveat is that this has to be 240V. This is a subpanel coming from the main one. There is a breaker ...
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2answers
96 views

Is there such a thing as an arc-fault breaker in 1/2” size for GE?

The panel is loaded but not to capacity. To bring the current sub-panel up to the imminent adoption of the 2017 code, half-sized AFCI or combination breakers would be great. Is there such a thing as ...
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1answer
59 views

Can I install a subpanel on top of boards instead of of between studs?

I am installing/replacing a sub-panel in the basement of a split-level. The new panel is on an unfinished wall (drywall on opposite side, towards living-room, but no drywall on the basement side), but ...
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2answers
78 views

What size wire and breaker should I use for a small one bedroom cottage?

Have a small one bedroom cottage. I need to install a subpanel in it. I have a two hundred amp panel 30 feet away. The only things I will power in the cottage are two can lights, six outlets, small ...
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1answer
162 views

Subpanel Vs. 220v-240v NEMA 14-50

Thank you in advance for your advice! My project is to install a 220v-240v NEMA 14-50 outlet at my house’ s attached garage, which is nearly 65 ft/one way, from the house’ s main electrical panel / ...
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5answers
5k views

I do not have power to all my breakers

I exchanged my double pole 40 ampere breaker that supplied my sub panel for my garage with a single pole 40 ampere and now out of my six breakers in the sub panel only 1,3, and 5 have power. How do I ...
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0answers
53 views

Putting a sub panel for a home office/bedroom?

Recently, our neighborhood had a power outage for a few days. Causing my office/bedroom to lose power completely which was a bit of an inconvenience. Out of curiosity, I began googling about ...
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3answers
80 views

Grounding Requirements for same structure subpanel

I understand that unless a 250.32(B) (NEC 2014) applies, a separate ground wire should run from the main to a subpanel where the service is in a separate structure. Still confused however about NEC ...
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2answers
105 views

How can I fix my garage's existing wiring

My non-attached garage is currently fed with a 10-2 w/ground wire from my main service panel via a single pole breaker buried in conduit. When the wire enters the garage it enters a junction box were ...
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2answers
584 views

Second 100 amp breaker inside existing 200 amp residential panel for new detached garage

I'm planning to build a new detached garage. My question is can I add a second 100 amp breaker to my existing 200 amp Square D residential panel box? The existing 100 amp breaker goes to my quest ...
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2answers
53 views

run nmb cable in conduit

I've decided to run a new 60 amp sub panel in my garage using 6/3 NMB. Can I run it 35' through 1" pvc conduit from main panel to sub panel without stripping off the outer sheathing?
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1answer
49 views

what size of sub panel do I need for a small in law unit

Im converting my garage into a small inlaw unit for my daughter I have a 125 amp service to my house. she will have a burner plate, fridge and an mini split ac unit for air and heat. it has a gas ...
0
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1answer
117 views

What size wire needed for 100a subpanel 120ft away from house sub panel? Biggest amp draw will be a window A/C unit, and a pool pump

What size SER wire needed for 100a subpanel 120ft away from house sub panel? Biggest amp draw will be a window A/C unit, and a pool pump. Other than that, just a few LED lights and outlets...detached ...
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2answers
138 views

Wiring a sub-panel with an equal sized breaker on each end of the feed, which will trip first?

I'm wiring up a small backyard tiny house for use as a rental.  Main power will be supplied by a 30A breaker and 10/2 wire coming from the main house, to an RV box, then to an RV plug, then into the ...
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1answer
67 views

RV sub panel on main feed

I want to add an RV subpanel to our cabin, but the location where I want it is very close to the main service switch, but pretty far from the circuit panel inside the cabin. Currently, there is about ...
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2answers
55 views

Protruding subpanel

I am in the process of installing a subpanel to replace a fuse box in an apartment. My problem is that all the walls are very shallow such that subpanel protrudes about 1 1/2”. It seems all the studs ...
3
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2answers
117 views

Wiring from Main to Subpanel

I posted a question a few weeks ago regarding wiring to a pool sub-panel, and I'm grateful for the wonderful information I received. Since then, I learned a little more about the area between my main ...
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1answer
49 views

Sub panel for garage

Can I put a sub panel in a garage 100 feet away from house. I only have 100 amp service in home. What size wire and breaker should I need?
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2answers
53 views

Need help understanding amperage ratings for panels and sub panels

Im trying to understand the concept of amperage ratings for panels, and sub panels, but I'm not sure I have it figured out, sorry for any novice terminology. I'm in America. Grounds omitted for ...
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2answers
86 views

Wire and Conduit for Indoor Sub Panel with Outdoor Main Panel Through Attic

My main panel is outdoors on one end of my house. Planning to add a sub panel for very occasional welder use, electric car charging, and future expansion in the garage on the other side of the house. ...
2
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1answer
74 views

Advice on installing an attached garage 50A sub panel

I'd like to add a 50A sub panel to my attached garage workshop. The sub panel feeder line will run from my 200A main panel, through my basement ceiling space and enter through the garage wall. The ...
2
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2answers
165 views

Can I feed a sub panel off my 200A service box? Or would I need to run wire from the inside breaker box?

Can I add a sub panel feed off my 200A service box? If so what are the requirements? Or would I need to run it from the main house breaker inside the house and wire from there? I currently have a ...