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].

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2answers
17 views

What size sub panel can I put if Im using #3 THHN wire for 160’ run?

I have a detached garage about 55’ from the back of my house and my main panel is in my basement. So Im planning to run about 160’ #3 THHN wire in conduit (About 90’ inside the basement and 70’ ...
3
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3answers
271 views

Adding 200-amp subpanel to 200-amp main panel sanity check

I just bought an older house. It looks like it was upgraded at some point to 200-amp service, with a new load center, but most of the old 2-conductor (no ground) wiring remains. The 200-amp main ...
3
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1answer
144 views

Is this panel up to code? Even with the gaps and visible wiring?

This panel cover is not flushed to the circuit breakers and has gaps with visible wiring. Is this unsafe and a code violation?
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4answers
206 views

Can I add 20A circuit to a this subpanel somehow?

I have a 240V subpanel on one side of my house which is fed from a main panel on the opposite side of the house. It is on a 100A breaker. This subpanel is full, with 2 50A breakers and a 30A breaker ...
3
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3answers
126 views

Can a circuit connecting to an outlet be branched as a subpanel?

Can I have something like this, or does the cable run from the panel to the subpanel need to be dedicated? Main Panel+Breaker -> 40A dryer box with Outlet -> Subpanel+Breakers -> More ...
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1answer
52 views

How do you verify a good ground connection when using EMT conduit as the ground?

When using metallic conduit as the ground wire, how do you confirm that the conduit provides a solid end-to-end connection? If using an ohm meter, how would you set it up and how many ohms are ...
2
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2answers
144 views

Can I put an electrical panel in a closet in a closet?

That's not a typo in the subject line. I am finishing part of my basement to put in a new master bedroom, bathroom, and closet. I was planning on putting the panel in the walk-in closet but enclosing ...
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3answers
67 views

Sub panel neutral and ground

Our building (built in 1960) has 5 sub panels everything being run in rigid or emt conduit. The neutrals are isolated. If I need to add some 15A receptacles can I add a ground bar to panel cabinet ...
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2answers
47 views

Having Two 100 amp main panels?

House has 100amp service. 100amp main panel inside home. 50amp sub panel in detached carport/laundry room coming from main panel. Can I run from the main outside at the meter to a new 100 amp panel in ...
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4answers
139 views

is there a true 400 amp panel rated as 400 continous amp

It seems common to use 400amp (320 amp class) panels. Are there any 400amp panel rated as continuous 400amp on the market? If yes, why not use these panels? For the 400amp (320 amp class) panel, are ...
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1answer
77 views

How can I add a sub-panel to a garage fed by existing 1" RMC conduit?

I want to add a sub panel to my garage to run a plasma cutter, welder, 220v air compressor and a CNC table. Not at the same time, but the plasma and air compressor probably will at times. I currently ...
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1answer
71 views

Sub Panel selection/configuration

So I know this question has been asked before, even by me, but I am at the point where I can be more specific, using information provided to me in another posts and specific info on my loads. I am ...
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0answers
34 views

3phase surge suppressor on single phase utility supply

I am using a 3 phase 4 wire surge suppressor on a single phase 240V mains. Is it still okay or will it have some back feed impact on the mains system?
2
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1answer
607 views

Cannot turn on breaker switch after turning it off

Summary I turned off each circuit breaker in my electrical panel to understand which switches controlled which devices, and now one of them immediately goes to the middle (tripped?) position when I ...
5
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2answers
1k views

How should I mount conduit to my wood-laped siding?

I was thinking about using superstrut to hang conduit on the side of the house, but hangers would be easier because siding is wood-lapped so it is not a flush surface. I'm open to other options as ...
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2answers
56 views

Can 4 wire 240v circuit 30amp also support a 120v outlet

I'm planning to run a four 10g wire 30 amp circuit to supply 240v for an electric dryer. I'm wondering if I can add a 120v outlet to this and only use one outlet at a time on the same circuit, instead ...
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1answer
29 views

Slowing down a swamp cooler motor

Specs of motor: -evaporative cooler motor, 2-stage -1/2 horse power -115 volts, 60 hertz, single phase I’m using the motor for a Halloween prop. It’s a 15’ diameter Ferris wheel (no human riders). How ...
2
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3answers
849 views

What kind of strain relief should I use for PVC conduit at a metal box?

The old owners left an unfinished electrical box that was the to be outlet for an EV car charger and I am thinking of gearing up to finish it( 3 foot run from the panel) however the only thing that is ...
0
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1answer
61 views

Bonded vs unbonded generator when running your main utility panel in an outage

I am starting a DIY project, and will be installing a 30 amp inlet on the side of my house for my main panel, with a sliding interlock kit to run my portable generator in the event of an outage. My ...
0
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1answer
57 views

Running a SER cable to a main panel through the back

My house has a older panel that I am running a 1/0 SER cable to my garage (attached by a breezeway, with a attic). My problem is running the SER cable to the BACK of the already installed main panel (...
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1answer
63 views

Providing a ground to old 2-wire connection in a detached garage

I just moved into a house built back in 1961. The house was totally rewired in 2018 so is up to code. The garage is detached and has two old 2-wire, 15 amp 120 volt circuits with no ground wire ...
38
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2answers
11k views

How did a circuit that was shut off at the breaker almost kill me?

I just had a near-disaster while trying to install new smoke detectors. My house has AC hardwire connections for the smoke detectors. I wasn't sure which circuit the smoke detector AC connection was ...
9
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3answers
1k views

Can you use a 2 pole 2-slot wide breaker to provide 240V?

Forgive my ignorance in terminology, I am a computer engineer but not an electrician. The concepts make sense to me, but I don't know all the industry standards and jargon. I recently had a 240V ...
5
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3answers
706 views

Can I add a second set of lugs to a 200A panel for a second sub-panel?

I have a 200amp service meter wired to a 200 amp outdoor breaker panel which has lugs feeding my 200amp breaker box in the house. I'm adding a garage 30 feet away. Can I put another set of lugs in the ...
4
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2answers
2k views

Will this electric panel pass NC inspection?

Will this electrical panel pass inspection? I know there is a 3 foot clearance requirement but not sure if it's an issue here. This is a replacement panel in an old house that previously had an ...
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2answers
131 views

Can I add a breaker to outside main disconnect box?

I already asked this. But I have to toss that whole thread. We had bought the model home & I just moved here. Next to us was the lot that they used as a parking lot for the model, that now they ...
2
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3answers
105 views

Main and subpanels selection in new project

I am working, with full permits from the city and future planned inspections of course, as an owner builder for the following projects: construction of a detached garage, where I need a 200A service ...
0
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3answers
78 views

Adding Transfer Switch to Main Breaker with no available ground/neutral spots on bus

I am installing a 10 circuit reliance manual transfer switch. I need to install the ground to the ground bar and the neutral to the neutral bar. However, both grounds and neutrals are mixed in my ...
0
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2answers
58 views

Window Air Conditioners Keep Tripping Breakers in Shared Home

We are living in a sober house and have come across a weird complication and a few of us that have no clue on the electrical field but do have wits to fix simple things. The 3rd floor recently had a ...
0
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3answers
88 views

Installing a 100A panel in detached garage. NEED HELP!

I am a carpenter contractor with a wide knowledge of the trades. I am confident in my abilities to tackle this job, but want to make sure it's done RIGHT! I used to be terrified of electrical work, ...
0
votes
1answer
71 views

Can you connect both a cooktop and an oven off one three-phase cable?

I have a couple of contractors renovating my kitchen and I have two appliances that I will need them to install: an induction cooktop (7600W max power, three-phase) a built-in oven (3600W max power, ...
10
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6answers
2k views

Do my exterior GFCI outlets really need to be on their own circuit?

I am selling my home and the buyers had an inspection done where the inspector listed the exterior GFCI outlets as a safety hazard because they weren't on their own circuits. These outlets were ...
4
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2answers
571 views

Can I add a breaker to this external main shutoff

Our neighborhood and my house has Square D QO equipment. There is the external main shut off with a 200 amp breaker. It goes straight to lugs and then the wires that go to the main panel in the house ...
0
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1answer
45 views

Replacing old, scribbly panel directory labeling

I purchased an older home built in 1975. It has a GE Powermark Gold panel box with 150 amp service. The home has been remodeled a few times, so the panel box label for the breakers have been marked ...
2
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1answer
50 views

PEX Upgrade With Plumbing System Electrical Grounding

I'd like to replace my old outdoor hose bibb (because it's really difficult to turn on) with a new hose bibb and PEX. Ground Wire 1 On the other side of the hose bibb is copper pipe and a clamped ...
6
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5answers
2k views

Is it possible to downconvert 30A/240V to 15A/110V by replacing a circuit breaker?

I recently moved into a new apartment with... "curious" wiring. There is a single 15 amp/110 volt outlet that is directly wired to a 30 amp / 240v breaker. I suspect there used to be a drier ...
0
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2answers
61 views

Can 2 different portable generators be wired to off-grid cabin's single panel - not used simultaneously but rather one or the other at different times

We have an off-grid cabin. Currently we have a Champion 7500 watt dual fuel generator powered with propane that is connected by a 120/240v cord directly into the cabin's electrical circuit panel. The ...
0
votes
1answer
33 views

Can I add a 200 amp sub panel, for my future house/garage, off of my outside 200 amp main panel that already has a 90 amp sub panel coming from it?

I have a Eaton 200 amp main panel coming off the meter base. The main panel, at this point, feeds a 30 amp RV outlet and a 20 amp GFCI, and a 90 amp sub panel for the well (30 amp) and a 20 amp GFCI ...
1
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2answers
77 views

Does adding a receptacle to a circuit require updating to AFCI?

Remodeling a kitchen. I'll be adding two new circuits dedicated to the microwave and fridge. I'll also be reconfiguring the countertops which will result in having to add another outlet to meet code ...
0
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1answer
128 views

What is this small box on the ceiling?

There is this small removable box on the left hand corner of the ceiling in the duplex down that I'm looking at. Can someone help me understand what it is?
1
vote
1answer
153 views

Using 6/3 NM cable to feed 60 Amp to subpanel

EDIT: Nobody was willing to answer cable needed for 100 amp feeder so removed questions. Also, code references in the answer are several years or more out of date... Ed B was correct to be careful of ...
0
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1answer
81 views

Question about adding CTs to a SE cable

Trying to figure out the best location to put some CTs on 2 runs of service entrance cable. I have a 400A main meter panel on the exterior of my house (2 200A main disconnects), one 200A main goes to ...
3
votes
1answer
723 views

Can I replace a 100A meter panel with a 200A meter panel **before** replacing the load center?

I want to upgrade my home's service from 100A to 200A. I have a new Siemens 200A meter / disconnect combo panel as well as a new Siemens 200A load center to replace the existing meter socket and 1960s ...
0
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2answers
58 views

Are 120V Feed Hot Wires in a panel/sub-panel Interchangeable?

I am feeding a sub-panel using four separate conductors (2 hots, neutral and ground) from the main panel. Intuition tells me that there is no difference between the two hot wires. As in either of ...
1
vote
1answer
100 views

How to properly transition from NM-B to THWN from an attic to exterior surface mounted panel?

I am running 20 circuits using 12/2 NM-B cable that need to transition to a surface mounted box that is located on an exterior wall. I originally had the NM-B cable entering the knockouts located in ...
0
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0answers
36 views

How to water seal my exterior wall after panel install?

I’m upgrading to a 200 amp panel and I’m using a surface mount on my stucco exterior. I tried reaching my inspector but due to the pandemic he’s been unavailable. I will be applying urethane caulk ...
1
vote
2answers
109 views

Can I split a 50 amp Circuit into two 15 amp and a 20 amp?

On the main breaker for my house I have a 50amp circuit which until recently was being used for a hot tub. I would like to repurpose the circuit by running it to a sub-panel with two 15amp circuits ...
0
votes
1answer
75 views

Can a Neutral pigtail wire and ground wire share the same bus in Main main?

This is service main panel ( Square D QO load center) . I have to add total 9 breakers. 7 breaker on left and remaining 2 on right side. I am seeing earlier electrician ( during construction) put ...
0
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2answers
110 views

Can I have a 14-50 50 amp outlet installed?

Before I go through the trouble of finding an electrician to come to my apartment to give me an estimate, and to tell me whether he can do it or not, I wanted to ask this question here to find out if ...
2
votes
2answers
436 views

Breaker compatibility

I'm needing to replace a 20A single pole breaker in my Thomas & Betts, TBB20(20-40)CG Mod. 1 panel. Is there a site with a compatibility chart so I can buy the same type breakers? I saw the post ...

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