Questions tagged [electrical-panel]

For questions about panelboards (also known as "electrical panels", "circuit breaker panels", "fuse boxes", "distribution boards", "consumer units", or "load centers"). Questions about individual overcurrent protection devices should use [circuit-breaker].

140 questions with no upvoted or accepted answers
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1answer
153 views

What breakers to do I need to connect an outbuilding to main power pole?

I need to hook up the outbuilding to the main power pole. It was hooked up before and we moved, moving the outbuilding. I have 10/2 WG UFB wire. the photo shows main power pole. What size amp do I ...
3
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0answers
348 views

200Amp Panel upgrade, Flush panel to Surface mount

I'm looking to get my house panel upgraded from a 100 amp FPE firestarter panel to new Square D Panel. The panel I want to use is surface mount and the one built into the house in the 1970's is flush ...
3
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2answers
488 views

hot / cold copper water pipes located above main electrical panel

The Pipes are about 7.5 feet above the basement floor. I am in Canada. . The pipes are about total 2 feet in vertical length as measured from the 90 degrees turn from the basement, popping up the ...
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2answers
147 views

Adding a 100A breaker in front of a feeder

OK, in a rehab of existing outlets I came across a 30A dryer receptacle on a 50A breaker with 12/3 AWG. Needless to say I am not happy. In looking at the breaker box, the white and bare ground are ...
2
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0answers
39 views

NM cable routing to panel backboard / side of the service panel. Take 2. Any NEC 2017/2020 concerns?

Going off of my previous question, I wanted to get a confirmation the below is compliant with NEC2017/2020 for connecting NM cable to a main panel. I have used a length of 12/2 NM cable to show how I ...
2
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0answers
54 views

Hot tub wiring plan - does my plan check out?

I'm looking for feedback on my electrical plans for a hot tub install. The space is in a 7 unit building located in NYC. The apartment is owned, not rented. I am planning on hiring an electrician for ...
2
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0answers
68 views

Can I install a 240v heater/air wall unit in my garage with the existing panel and wiring?

The unit says 230/208v model. It has a 20amp plug on it. 1st question My garage panel was put in 30+ years ago. It is fed from house panel with 12 gauge wire with 2 hots. Is that too weak to add a ...
2
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1answer
105 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 ...
2
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1answer
238 views

Subpanel breaker size and wire size

I'm looking to add a subpanel for a basement kitchenette. Here are the power requirements and intended new circuits. Appliance Voltage Amps Slot Circuit Amps Oven/Range 220 28.0 ...
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0answers
259 views

Adding neutral lug to older load center

In the process of installing a remote subpanel from my older backfed load center. The neutral/ground bar is attached to the service entrance via the screw midway, and the ground is at the base of the ...
2
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0answers
254 views

Can I use an outside feeder tap to run power to a garage?

I have a newly built garage that I would like to add a sub panel. I have a QO load center QOB8-16L 100S which is rated for 100 amps. However, I think 60 amps would be more than adequate for my needs ...
2
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2answers
534 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 ...
2
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1answer
87 views

Turning on any high-power device trips my RCD

Today I turned on my water boiler, and all the lights in my apartment turned off. I opened the electricity box and saw the RCD was tripped. I turned it back on, but then it would trip again whenever ...
2
votes
1answer
480 views

Bring portable generator in through automatic transfer switch

I currently have a portable generator, an inlet, and an interlock on the main panel to backfeed the panel. I am moving over to an automatic transfer switch with a standby generator. However, as a ...
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0answers
157 views

Help me identify the components of my switchgear?

I have a basic understanding of what I need to do when the power line goes down, though sometimes different switches pop and would like to understand more of what does what. I have no knowledge in ...
2
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0answers
153 views

What could be causing this weird problem with a 240v trainer?

I'm in electrical classes and we are hooking up a 240v trainer. Last year the trainer worked fine. When connected to power there is a 120v light bulb that lights up to show that power is on. ...
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0answers
40 views

Double pole breaker partial failure?

Yesterday I was connecting a large toroidal transformer to an unused 240V 15A circuit in my apartment (US split phase) for testing. I plugged it in and I heard the breaker trip after a few seconds. I ...
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0answers
74 views

Main breaker not turning off oven

Something very strange is going on at my mother’s house. The oven, which is not built in but just a pigtail plug has been malfunctioning. She has ordered a new oven and is ready to put it in. When ...
1
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1answer
38 views

how to plug a 3 phases oven from the panel

I’m moving to an apartment and would like to plug in an oven, the agent told me it was 1 phase condo but when I look at the panel it seems to be 3 phases. Is it 1 or 3 phases? If 3 phases can I use a ...
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0answers
67 views

Why would two sub-panels be cross-connected?

I have a house with 2 main 200 amp panels. These will need to be replaced as the are Federal Pacific. Each panel has its own 200 amp main breaker. I am in the process of tracking down what wires go ...
1
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0answers
57 views

Can I run cable through a junction box in a cabinet and then to the dishwasher?

My electrical wire to my dishwasher comes up through a hole in the subfloor wired right to the dishwasher. I wanted to replace it (too much to go into here, just know the subfloor got wet, and I ...
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0answers
41 views

30V on 120 circuit - swapped dishwashers and circuit dropped to 30V

Situation: replaced dishwasher. Turned off the breaker first. The original DW is 100% fine, just doing an upgrade. I did not measure the voltage on the wires. New one - connect to existing wires, ...
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0answers
172 views

Can I add a 60 amp hot tub on a 100 amp service?

I'm adding a hot tub to our backyard. The hot tub can pull up to a max of 60 amps when all the pumps and heater are going. However, a sales rep said it's not common that you would be pulling all 60 ...
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0answers
37 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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0answers
133 views

How can I tell if I have a ground wire?

I was looking at my service panel and noticed I don’t see any wires leading to the ground. Is it possible there is no ground or maybe the ground comes from my service? I have four wires coming in. I ...
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0answers
62 views

Troubleshooting a breaker box - several breakers stopped working

Most of the outlets in my workshop stopped working last week. My 220V outlet, a dedicated outlet for a compressor, and the garage door are still working. The shop has a dedicated circuit box, which is ...
1
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1answer
112 views

Campground sub panel grounding question

I’m involved in maintaining a small campground. Some areas are served by overhead electric and an underground services. No ground wire was ever ran or pulled from the main breaker panels. Individual ...
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1answer
73 views

Proper Circuit Disconnect Size

I am concerned by the size-selection' s installation of an "80A Service-Disconnect" on a 200A uni-pak, to feed the nearly 2,200 square feet modern house with a 5 Tons HVAC central system. Very modern ...
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0answers
118 views

150A for outdoors kitchen - wire size

I am working with the city to get the permits to build an outdoors kitchen with its own sub-panel. I decided to place it 100ft from the house. In my list[*] I have an electric tankless water heater, ...
1
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1answer
139 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
837 views

Only getting 15-16 volts from Furnace R and C

I recently purchased a smart thermostat. Because it needed a common wire and I only had a 3 wire setup, I ran a new thermostat wire to my furnace. However, I now get only 15 volts (inconsistently, ...
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0answers
59 views

Shocked while main panel breaker was off

Yesterday I pulled a new wire to an existing breaker in our electric panel. Obvious first step was to turn off the main breaker, which I verified with a non-contact voltage tester (confirmed working ...
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0answers
210 views

Can I install a 60A branch circuit breaker in a 60A sub-panel?

I am connecting a kiln which requires a 60 amp circuit to a sub-panel. The sub-panel is off the 100 amp main fed by a 60 amp breaker. Do I need to increase the sub panel breaker size or is as is ok?
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0answers
62 views

Replacing a cable in an electrical panel: Need hints and names

Previous owner left a chunk of 3 line triplex(2 insulated + ground) 4 ga aluminum into the main panel, hooked it up to a 50A breaker, and left the other end floating free in the rafter space of our ...
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0answers
37 views

How do I compute how much electric service to provision?

Generic question here. I won't self-answer. Suppose I am adding significant new loads to an existing house - say, a 50A hot tub and a 50A RV receptacle. Those are big loads for a modest gas home. ...
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0answers
35 views

Putting a breaker panel in detached home office half bath

I'm building a home office and have a question about placement of the main breaker panel. Ideally it will go in a half bath (toilet and sink only) in the corner of the structure. Reading elsewhere I ...
1
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1answer
91 views

Can screwdriver tester detect ghost voltage?

While I was replacing a switch, I noticed that my screwdriver tester lit up (it can detect 100V to 240V) when I touched it to the earthing wire. Then by testing the supply with my multimeter I got ...
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0answers
65 views

How to correctly ground long distance from main disconnect to first panel

I've got a property with an existing very sluggish electrical installation which consists of a service drop at property entrance, no main disconnect and a 130' underground run to the living space (...
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0answers
71 views

Weird electrical problem just started

Rv pole with 200 amp outside box. One 30 amp breaker. Ran new wire underground (mobile home type) to small house building in progress. All sockets and lights worked fine up to 2 weeks ago. One ...
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0answers
77 views

Adding washer and dishwasher to existing breaker. No Dryer. Unsure if it can handle

I currently have a 3 family where I am looking to install compact washing machine and a dishwasher for all 3 floors. It is an older building. Will be going with permits. The first floor main panel is ...
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0answers
224 views

How to repair cable at the breaker box knock out hole?

I'm getting ready to replace the breaker panel in my condo and I found some scary damage in one of the cables coming into the box from the top, just at the knock out hole (see picture). The damage ...
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0answers
92 views

Service needed to add a tankless water heater

I am currently building a detached 250 sq feet studio in my backyard. The studio will have a tiny bathroom with a tankless water heater, a baseboard heater, and a few lights, a mini split (ac), of ...
1
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0answers
34 views

Am I Missing Any US NEC Specific Reqs?

USA Here. Renovating bathroom. I will be installing a new 12-2 Romex run on a 20-Amp breaker to a GFCI Outlet, and out of the outlet to feed a switch for a light fixture. Starting in the basement ...
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0answers
115 views

Questions about installing an electrical subpanel (re: wire size, etc)

My current electrical panel is filled and I'm going to have a pool installed this year so I need to install a subpanel. (my current box doesn't support tandem breakers, etc) Because I only need more ...
1
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0answers
584 views

is there a difference in URD or UF #6-3 wire? should they be in conduit?

So, after some research, I decided to go with a double pole 60amp on my main panel with a #6-3 wire to feed my sub panel on a detached shed. The shed is 70 feet away. MY question is, someone said to ...
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0answers
318 views

How to bring solar panel wires inside house?

I have a pretty simple solar panel setup in the backyard which links to the charge controller to the batteries. I wanted to run wires inside the house so I can use it for smaller stuff like charging ...
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0answers
4k views

Is my electrical panel big enough for my hot tub?

I just bought a hot tub that requires a 240 volt, 50 amp dedicated circuit. My electrical panel has a rating of 100 Amps. Max. All the breaker slots are full but I am wondering if I could consolidate ...
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0answers
57 views

Running Power to detcached studio

I will be running power to detached studio that is about 50ft from my home. The studio will have 6 canned lights, 1 chandelier, 2 porch lights, and 6 receptacles. The studio will also have a 115v mini ...
1
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3answers
16k views

How do I know if I can run power to a garage from my breaker box?

My breaker box is a 200 amp service. There's 16 openings and only 1 blank space for a new breaker. I have a garage about 100' away from the house that I'd like to run lights and a few plugs for tools ...
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0answers
134 views

Run additional breaker to detached garage

I have a detached garage about 40' from my house. There is already an electrical panel out there but I run my business out there and use a decent amount of electricity. There is only one 120 breaker ...