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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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Can I connect a 100 amp sub panel to a main that is 275 feet away? [duplicate]

Can I connect a 100 amp sub panel to a 100 amp main that is 275 feet away? I am wanting to run electricity to an outbuilding. What size wire should be used? I will be burying the cable in plastic ...
GRIFF's user avatar
  • 1
5 votes
3 answers
962 views

Can I convert 50 amp electric oven circuit to subpanel, and power oven plus water heater, plus maybe a car charger?

My gas water heater is very old, and I'd like to replace it with a heat pump electric water heater. The one I'm looking at is 19 amps, 240 volts. My breaker box is in a finished part of my basement, ...
BaddDadd's user avatar
  • 357
1 vote
2 answers
106 views

Unsure if licensed electrician correctly wired old Zinsco 100-amp panel to new Siemens 200-amp subpanel

Our 1,572 sq. ft., 1972-built home in San Diego has a 100-amp Zinsco panel. We just learned that Zinsco busses and circuits are a known fire hazard. We talked to 4 licensed electrical companies, had ...
Kat's user avatar
  • 11
0 votes
0 answers
28 views

the installation of the subpanel outside gaps in the wood Advice?

The location of the subpanel will be on the exterior wall it is wood that has little gaps I have two thoughts 1 to use wing nuts into the exterior wall and mount flush. 2 to install unistrut and mount ...
B Brown's user avatar
0 votes
1 answer
45 views

Can I temporarily power a 200A subpanel from a 100A feeder breaker? [duplicate]

Long story but I currently have a 200amp through-panel outside my temporary dwelling (lets call it the cabin) which feeds a 200amp panel inside the cabin (all of our circuits feed from the 200amp ...
Jason's user avatar
  • 1
0 votes
0 answers
35 views

Sub Panel location changed from side to the front side of the house access issue from the attic

Advice and idea's please The location of the subpanel has been moved from the side of the house to now the front. Coming out of the attic we would have to be in the Eave straight down. There is not ...
B Brown's user avatar
0 votes
1 answer
44 views

50 AMP sub panel in new shed

I have built a new shed and would like to install a 50 amp sub panel for power to the building. I did not install conduit into the slab. I will need to come up the side of the slab and then enter ...
Paul Grose's user avatar
0 votes
1 answer
53 views

PVC in wrong location need to transition from there to around the corner to subpanel [closed]

There was a 1" and 2 3/4 PVC ran to the wrong location they brought them up on the front corner of the house about a foot away from the edge . The subpanel is located a foot and a half from the ...
B Brown's user avatar
1 vote
2 answers
129 views

Why isn’t my service (Main) panel space being utilized and everything is being fed to a sub panel?

Edit: As requested please see the attached photos. @manassehkatz-Moving 2 Codidact Thank you for the reply. As you and a few repliers mentioned, I figured out how to upload some photos so hopefully ...
newhomeowner's user avatar
3 votes
0 answers
45 views

electrical conduit to panel connection question

I am in process of designing my solar system, but my questions are pure (IMO) electrical ones: My PV panels are connected to microinverters which are connected to J-box. I am planning to connect the ...
user166068's user avatar
1 vote
1 answer
91 views

Cost optimization for wiring electrical subpanel in my garage?

I will be installing a 100A subpanel in a detached garage. 100A for an EV charger and shop tools, and future proofing for a potential laneway house conversion. The garage is relatively close at just ...
Levi's user avatar
  • 494
4 votes
2 answers
785 views

200 A Main Panel pass thru lugs to 200 A Subpanel

I currently have a 200 A main panel outside my cabin. Inside is the main 200 A shutoff and on the bottom of the bar are 2- pass thru lugs. The panel is a Square D Model# hom816m200ftrb Panel has 8 ...
Matthew S's user avatar
1 vote
1 answer
46 views

Low voltage relay to control well pump -- would like run unswitched power to subpanel in shed by well

Well is about 130 feet down hill through woods from basement with 200A panel, pressure tank, and 120v pump switch. When they put in the well 17 years ago, I asked that they put in a cord so we could ...
Claude B's user avatar
1 vote
1 answer
93 views

Grounding a dryer to a subpanel

Related to Grounding a 3-prong dryer plug, but with a small twist. I have a NEMA 10-30 that runs back to my main panel. Since we had a leak in the laundry room, I'm having to open the wall. I'd like ...
Machavity's user avatar
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4 votes
3 answers
2k views

Is a double 30 amp breaker powering three rooms bad?

I just a bought a house and discovered that a double 30 amp breaker is hooked up to three rooms with approximately 12-15 receptacles. Is this dangerous or am I good? Update: I have been informed that ...
Joel Pierce's user avatar
0 votes
1 answer
78 views

Can I add a 100 amp subpanel off my 200 amp service?

I am going to be installing a 100 amp breaker from 200 amp panel about 600 feet away. I have asked PUD to give me an average of power for the last year and the highest amount for summer and for winter ...
B Brown's user avatar
4 votes
3 answers
625 views

Proper way to extend circuits to subpanel

I would like to move 8 x 20A circuits (room lights, ceiling fans, outlets in the bedrooms, and living room), and 1 x 50A (AC) circuit from left main panel to the right sub-panel. The sub is a "...
utdrmac's user avatar
  • 141
2 votes
2 answers
108 views

"Main" panel wiring

At my property the power company installed the meter with a box below it with a 200 AMP breaker. There are lugs inside to attach wires directly to the bar so they feed directly from that breaker. So....
Jason Kilby's user avatar
0 votes
1 answer
71 views

Can a subpanel ground originate from a separate circuit/conduit?

I have a 30amp pool subpanel wired with 10awg THHN through 3/4" schedule 40 PVC conduit. I'm considering installing a heat pump pool heater which will require a beefier subpanel. Can I run 2x ...
Travis's user avatar
  • 212
1 vote
0 answers
141 views

How are these old (1900s era) US screw-in fuse boxes internally connected?

(ignore the arrows) The above pictures show the electrical panels in a house that was built in Illinois in 1909. I do not know for sure how original this wiring is, but I would guess that some ...
volcanosandwich's user avatar
0 votes
2 answers
84 views

Running cable to sub panel 125amp

I am putting a 125amp sub panel beside my main breaker and am figuring out the correct wire sizes. For the 2 hots to the sub-panel, I will use 1/0 gauge. For the ground, I will use 4gauge aluminum. ...
Noah 's user avatar
  • 101
1 vote
1 answer
53 views

Exterior 125A subpanel for pedestal selection

I am building an outdoors area in my backyard that will necessitate of its own subpanel. I have placed 2in PCV sch40 conduit in the ground and I plan to pull wires to power a 125A panel. I will mount ...
Alessio Sangalli's user avatar
0 votes
1 answer
76 views

Want to feed a new subpanel from a grandfathered subpanel

I have a grandfathered subpanel that feeds my 5 ton package unit. 1988 install. Recently we added an AC system and they fed the condensing unit out of that sub panel and they tied the ground into the ...
Jackoftradesexceptelectrical's user avatar
0 votes
1 answer
37 views

What is the recommended wire for a new 60Amp subpanel in a residential home

I would like to install a new subpanel in my attached garage in Texas. I plan to install a 100 Amp panel with a 60 Amp breaker in the main, which should be plenty adequate for the wood working tools I ...
clay t's user avatar
  • 1
0 votes
3 answers
82 views

How to make a 150a sub panel work with a 200a main panel when the max breaker size if 125a

Alright, folks. I screwed up and overlooked part of this project before I started. I have a 200a residential main panel. I installed a 150a subpanel 10 ft away to isolate service for a basement suite ...
Jeremy P. Beasley's user avatar
3 votes
1 answer
256 views

Possible to convert disconnect to sub panel? [closed]

We've recently removed a hot tub that was originally installed in 1983. I'd like to know if it would be possible to convert the disconnect for the hot tub to a sub panel. The breaker in the main panel ...
Scott D's user avatar
  • 31
0 votes
1 answer
43 views

running new feeder from exposed-basement load center to basement wall-mounted subpanel, + adj. duplex receptacle, THEN outside for 2 deck circuits

Project Context: about to place deck boards on wholly redone, raised, attached, front of house/front door accessing, 6'x20' deck. We are in IL, just south of the WI state line. Before laying these ...
jabberwocky's user avatar
1 vote
1 answer
107 views

Best way to power a nearby shed from house?

I have a seasonal vacation home on patio blocks (no foundation) and a 14 x 20 shed on the property - located about 8' from the house. The panel in the home was on an exterior wall, until an addition ...
stevecon's user avatar
0 votes
1 answer
71 views

Running Electric to Shed

I am a dog breeder and I am in the process of converting a 10 x 15 shed into a dog kennel house. I plan to insulate the building and run a sub panel from the houses main breaker. I’m really just ...
Tyler's user avatar
  • 1
0 votes
1 answer
92 views

POOL HOUSE AND NEC 225.30

When I built my home in 2012, I provided 16 extra circuits/breakers in a 400 AMP main panel and routed all 10 AWG, 14 AWG wires for 15 and 20 AMP loads underground to where the Pool house would be. ...
Shan's user avatar
  • 1
1 vote
2 answers
110 views

How many 100A/200A conductors can I run through a single conduit from my main service panel?

Current situation: main service panel (MSP) with 200A service on exterior wall. It feeds a single sub-panel via #2 copper conductors and is protected by a 100A breaker. These three #2 conductors to ...
divB's user avatar
  • 1,531
1 vote
1 answer
102 views

Load center is a subpanel if upstream breaker?

Oregon (NEC 2023) The power meter from the utility is mounted on an exterior garage wall. Right next to the meter box, but on the interior side, is a breaker box with a single 200A breaker. That ...
tau's user avatar
  • 227
0 votes
2 answers
103 views

Only 3 Wires going to a sub panel

I have an old Siemens sub panel (1990s) that I would like to replace soon. I took the panel cover off and and there is 3 wires (2 hots and a neutral). if I am correct, you need 4 wires (2 hots, a ...
randomstuff's user avatar
1 vote
2 answers
52 views

Should a sub-panel upstream from the main be bonded to ground? [closed]

If adding a 100 amp sub-panel from a meter box that is before the 200 amp main service panel. Do you need to bond neutral and ground wires together, like you would if installing the panel after the ...
William Dew's user avatar
1 vote
0 answers
32 views

How to divide circuit load without subpanel

I have a project where I need to use two 12 amp circuits and they ran one 30amp breaker with 10awg cable. The load lines are 2 devices that pull 10 to 12 amps. Can I connect both loads on to 10awg ...
Ritesh's user avatar
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1 vote
0 answers
49 views

Do I have enough room to thread 4/3 cable with ground through my basement?

I'm planning a partial basement renovation, including installing a subpanel to supply 70A, requiring 4 AWG copper wire. I'd like to avoid installing conduit, so I hope to use 3-strand + ground Romex. ...
Syntax Junkie's user avatar
2 votes
1 answer
60 views

How to bring 1/0 wire through foundation below grade?

I’m building an off-grid cabin in California. I have an array of solar panels that feed into an inverter and batteries in a small utility shed, connected to a 150A main panel. I want to run 125A into ...
Daniel's user avatar
  • 21
4 votes
1 answer
862 views

Hot Tub GFCI Breaker continously trips at sub-panel

Context: We've recently installed a Viking Legacy II hot tub, with an outdoor disconnect, and indoor subpanel. After troubleshooting various issues, I've exceeded my knowledge and am in need of help ...
hhsnopek's user avatar
  • 143
0 votes
0 answers
52 views

Should I use cable or wires in conduit for my new panel?

I'm redoing basically all of my electric and upgrading to 200A. The plans are in another question (Is my new electric/subpanel plan correct?) but the relevant part for this question is: Service ...
user112697's user avatar
1 vote
2 answers
78 views

Has a new panel outside the house made my main house panel a subpanel?

I had a solar system installed. The old 70s main panel never had a master switch to shut all the breakers down. The new outside panel now has a correct 200 Amp breaker. The breaker is labeled Main ...
Michael's user avatar
  • 11
0 votes
1 answer
66 views

Cable sizing for subpanel

I’m in the process of finishing my basement. An existing 200amp Square D load center is in the basement. I want to add a subpanel in the basement about 75’ away. The subpanel will feed: Dryer (50amp ...
Gary's user avatar
  • 41
3 votes
1 answer
2k views

Is 200 amp service enough for a tankless water heater with a 100 amp sub panel?

We just upgraded out house service from 125 amps to 200 amps, and the house is all electric, no gas at all. The same day that happened my 41 year old water heater developed a leak and one of the ...
JBurt's user avatar
  • 367
0 votes
1 answer
45 views

Circuit Breaker Size For Main Panel

I'm planning on adding a sub panel to my basement. I purchased a Square D 100 amp panel. Is there any code requirement for the size of breaker I need in the Main? My neighbor used 50amp. I've seen ...
Rick S's user avatar
  • 151
0 votes
2 answers
92 views

How can I supply an interior subpanel from a surface mounted exterior panel?

I recently purchased a house that has a flush mounted main panel on the exterior garage wall. I would like to install a surface mounted subpanel on the inside of the garage either right behind the ...
slock's user avatar
  • 193
0 votes
0 answers
38 views

Attached garage with sub panel not wired correctly, needs upgrade [duplicate]

200 amp service, 30 amp breaker from main to the garage sub panel, which is 97 feet run. The conductor is 12/2, in the sub panel has two 20 amp breakers and three 15 amp. I want to upgrade to 200 amps,...
user181421's user avatar
-1 votes
2 answers
93 views

Can I use a 70A panel on a 30A feeder breaker?

Since the Eaton 70 amp 2 space 4 circuit breaker box I have only lists 8 to 2 gauge wire can I still install my 10/3 UF cable with a double pole 20 to make 2 120v circuits in my shed? I have a ...
Chase Price's user avatar
-1 votes
1 answer
76 views

50AMP cord from generator into sub panel [closed]

My sub panel, located in the garage, does not have a main breaker. The main panel, located on the outside of the house, has a main breaker. The CB's in the main panel are as follows: Dryer, Subfeed, ...
David's user avatar
  • 21
0 votes
3 answers
325 views

Can I use 1/0 copper wire from main breaker to a shop sub panel?

I have about a 75 foot run and have some spare copper 1/0 (1) wire so would like to save on buying something different. Is this usable to tie into main panel lug, trench it in conduit and tie into a ...
Wallace's user avatar
1 vote
1 answer
143 views

Is my plan for running conduit to a new subpanel sound?

I'm installing a new subpanel in my basement that I am finishing and thinking to run some conduit from it out to the garage and down to the crawl space below for flexibility on adding future circuits ...
crichavin's user avatar
  • 243
0 votes
1 answer
112 views

Sub-Panel Separate Ground and Neutral Bars?

I have seen other posts about this question, but mine is slightly different. I have a sub-panel that has a bonded neutral and ground bar, which I believe is against NEC2008. I understand the concern ...
Select 'DBA''s user avatar

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