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].

150 questions with no upvoted or accepted answers
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480 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 ...
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0answers
45 views

Question about an outbuilding circuit breaker box

I have a house with an outbuilding that has its own apartment and shop in it. Right now all electricity flows through the meter on the main house. There is also a meter for the outbuilding that I want ...
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101 views

Connecting a 200 amp sub panel to 600 amp line

I have 600 amps feeding a 600 amp main panel. It is a GE panel, 600 amp rated bottom feed and the sub panel is less then 1 foot away. Can i feed a 200 amp sub panel with main breaker with 4/0 wire and ...
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55 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 ...
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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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0answers
382 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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2answers
700 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 ...
2
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1answer
624 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
157 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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1answer
59 views

Wanting to add a ground wire for a sub panel replacement. Would like to use use nearby EMT

Updating electric in an attached shop. There are two sub panels, both fed 240 from the main panel in the house. The one has large aluminum conduit, with the conduit serving as ground. The smaller ...
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0answers
70 views

Dish installer damaged the electric panel box

A few years ago (like 8 or 9 years) we had a television dish installer come to our house and install the dish. After using it for a couple of years we got rid of it but obviously left the dish ...
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0answers
51 views

Partial power out when AC is on

Anytime our AC is on we lose power in a few rooms mostly the kitchen. It can be on a few days before it goes out. I’ve had 2 electricians come they both said electric panel looks great , we did ...
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47 views

Grounding Metal Garage with Subpanel

For the subpanel I am installing in my metal garage (concrete floor), I have sunk an eight foot copper-coated rod next to the outside wall and adjacent to the panel which is on the inside of the ...
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0answers
27 views

312.6 interpretation when entering from the back of panel

312.6 lists (A) and (B) tables, for when NOT enterting oposite and entering on opposite wall of the box. How is the entering through the back wall interpretted? Technically it would be "NOT ...
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1answer
86 views

Building out wall for electric panel

I am replacing a tiny 6 circuit subpabel in my detached garage with a larger panel and have been trying to find some info on this but haven't been able to locate anything in NEC or other threads. My ...
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0answers
33 views

Rocker switch panel wiring

I am looking to wire a boat rocker switch panel to a 12 volt deep cycle battery for my canoe. I have three switched on the rocker switch panel. One will be for navigation lights, one will be for a ...
1
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1answer
51 views

One dodgy lamp: Differential is triggered and several separate circuit breakers become differential-triggering. How is that even possible?

I had a bit of a phenomenon on the neighbour's electrical circuit. What was observed: The differential had blown What was tried: I tried to to isolate the faulty circuit by trying to get the ...
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0answers
87 views

What would cause a terminal to explode like that on a circuit breaker switch?

My landlord was having his fun turning on and off my stove and hot water to get me to move out instead of fixing broken windows. As soon as the police got involved and my lawyer sent a notice, he had ...
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0answers
191 views

Eaton AFCI/GFCI breaker is only blinking once when turning it on

Model: CHFN120A1CS Description: Eaton CH arc fault / ground fault circuit breaker, All-In-One, 20A, 10 kAIC , Single-pole, 120V, pigtail, 3/4" AFCI/GFCI I bought two of these breakers and ...
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0answers
57 views

Main fuse gets too warm

I live in Sweden. Below is a picture of the 3 main fuses ( 20A 500V ) and our electrical box. Now the problem is that if we have too many appliances switched on at the same time for a while ( ...
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0answers
53 views

installing 100 amp sub panel with overgauge wire

I want to provide power from my existing 200 amp service to an outbuilding 300 feet away that used to have metered 200 amp service. The account was closed and the transformer removed by the previous ...
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0answers
19 views

Finishing around surface mount panel to make flush

This is similar to another question here, but with some significant differences. I'm working on refinishing a basement that was not done up to code. Currently the electrical panel is surface mounted ...
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0answers
54 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
83 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 ...
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0answers
69 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 ...
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0answers
64 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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1answer
164 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 ...
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0answers
45 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
491 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
38 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
68 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 ...
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1answer
137 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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0answers
122 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, ...
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1answer
171 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
2k 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
297 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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1answer
596 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 ...
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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
36 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 ...
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0answers
76 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
73 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
82 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
256 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
114 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 ...
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0answers
36 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
117 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 ...