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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7
votes
4answers
1k views

How to use a 100 amp sub panel for a 50 amp input

I'm building a shed I want to add power to. To get power I'm planning to use the power that is going to my hot tub (50 amp). The hot tub has a 50 amp breaker from the main to a 50 amp breaker box ...
1
vote
5answers
3k views

GFCI in a 3-wire sub panel with bonded neutral and ground

My detached garage has 100-amp 3-wire service from the main panel in my house, with a 100-amp breaker at each end of the feed. The grounds and neutrals are bonded inside the sub panel due to the lack ...
17
votes
5answers
6k views

What type of cable should I bury for a small utility shed?

I'm putting a 8x16 utility shed in my back yard. It will be 100 ft from the service panel. I want to run the supply line under ground. There will be one 4ft fluorescent light and two 120V receptacles....
3
votes
2answers
68 views

Do multiple ground bus bars need to be tied on subpanel?

I'm adding circuits to a subpanel. For wiring neatness sake, I'm considering adding a second ground bus bar. Do I need to tie both ground bars together (if so, what size wire), or is screwing them ...
1
vote
1answer
47 views

100amp Sub Panel for 75ft - Anything else I need?

to save myself some costs for adding a sub panel, I'm buying the cabling, sub panel, breakers, etc. NIM for an electrician to finish all the connections. I'm going to run the cables, etc. I'm ...
0
votes
1answer
166 views

No power to garage

I was replacing an outdoor light and couldn't find which circuit my garage was attached to. Tripped main breaker and garage still had power. I touched the "hot" to the ground to trip a breaker. Power ...
1
vote
2answers
70 views

Sub-panel ground and neutral connected to main ground and neutral bar?

I want to connect a RV sub panel with a 50a RV receptacle a 20a gfci receptacle totaling 70a. I have 200a overhead wires feeding a metered box with a 200a main breaker. Connected is a 20a double that ...
1
vote
2answers
52 views

Wire Size 100amp sub panel?

Merry Christmas! After lengthy research, still looking for some input. New sub panel in basement. Thinking Square D QO Plug-on neutral. Neutral and ground isolated, adding 2 ground bus bars - bonded ...
0
votes
1answer
57 views

Size of 240v service panel breaker

I’m adding a sub-panel to my house about 30 feet from the service panel. There will be two 240 volt circuits in the sub-panel. One will be a 240 v - 20 amp circuit and the other a 240v 30 amp ...
0
votes
1answer
22 views

Split sub-panel box with dual feeds? [duplicate]

Is this a thing? Kinda goes with my first question on here. Again i am not an electrician nor will i be doing the work. I am the builder and owner. In the designing stages of a tiny house on wheels ...
0
votes
1answer
48 views

Shed subpanel wiring

I have a portable building about 50 ft away the house. I had an electrician come run a feeder to a subpanel in the shed. Looks like he tapped off of my Generac Transfer switch. When I opened up the ...
2
votes
3answers
59 views

20A & 30A dual feed into subpanel

Okay so this is my first shot at this question, but not my first time trying to research the subject. I am in the process of designing a tiny house and have started thinking electrical. NOTE : I will ...
0
votes
3answers
63 views

Electrical circuits mixed in same conduit

I've got an electrical wiring question. I've got a 100 amp sub pannel close to the center of the house with an EXTERIOR 200 amp pannel of the west end near PSO FEED. I need to add a 30 amp recep ...
3
votes
2answers
94 views

Where should the ground wire connect in a new sub-panel?

I have an old style service panel - the ground wire (from a rod in the ground) and the neutral wire (leading in from the pole) are both bonded to the box. I want to install a sub-panel where I will ...
1
vote
1answer
53 views

Securing 3-3-3-5 SER at sub panel entrance

When installing a 100A sub-panel with larger wire (3-3-3-5 copper SER), is there a specific size of wire clamp I need for this? Do I use the same type of wire clamp as I would for NM cable, just ...
0
votes
1answer
64 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? ...
0
votes
1answer
44 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 ...
3
votes
3answers
163 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 ...
0
votes
0answers
37 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 ...
1
vote
2answers
113 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 ...
1
vote
1answer
36 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 ...
0
votes
1answer
102 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 ...
2
votes
4answers
120 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 ...
4
votes
1answer
237 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 ...
3
votes
2answers
162 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....
0
votes
1answer
61 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 ...
4
votes
2answers
333 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 ...
1
vote
1answer
80 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 ...
0
votes
2answers
82 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....
0
votes
1answer
44 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 ...
3
votes
2answers
150 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 ...
1
vote
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 ...
0
votes
0answers
34 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.
1
vote
1answer
65 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 ...
2
votes
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 ...
1
vote
2answers
69 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 ...
0
votes
0answers
37 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 ...
15
votes
4answers
3k 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 ...
1
vote
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. ...
2
votes
2answers
105 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). ...
8
votes
3answers
761 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 ...
1
vote
1answer
176 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 ...
0
votes
2answers
77 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 ...
3
votes
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 ...
0
votes
2answers
133 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 ...
2
votes
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 ...
0
votes
2answers
87 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 ...
2
votes
1answer
200 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 / ...
5
votes
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 ...
0
votes
0answers
55 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 ...