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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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14 views

Is it better to install temp service or permanent outdoor service with future home as subpanel?

This is for a 10 acre new residential lot in NW Washington. The transformer is 200ft away and this will be a new underground service to the home site. I'll be working on building the house myself over ...
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2answers
31 views

Electrical : can I attach metal flex to pvc conduit?

I am adding a home run from the main panel to the garage. On the outside of the house, it will be pvc. Where I come through the exterior wall to the main panel, I'd like to use metal flex, for ...
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1answer
27 views

Advice on installing an attached garage 50A sub panel

I'd like to add a 50A sub panel to my attached garage workshop. The sub panel feeder line will run from my 200A main panel, through my basement ceiling space and enter through the garage wall. The ...
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1answer
35 views

Shutoff switch before breaker box

I want to upgrade my 100 amp power to 200 amp. Under the new 200 Amp setup, can I install a switch that will cut all power to the hot bars in the box, say for lock-out, tag-out? Do they make a switch ...
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1answer
53 views

Why isn’t there a solution to detect loose neutral

Loose neutrals in a house can easily cause house fires and are not always detected until it is too late. Why isn’t there main “smart” breakers that not only detect loose neutrals / phase imbalance and ...
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1answer
216 views

Need help interpreting panel specification

On my electric panel spec sheet it says: Sum of current ratings of two breaker poles fed from one connector must not exceed 125 Amps. What does that mean?
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1answer
50 views

Can I connect circuits for a dishwasher and sink disposal unit to the same breaker?

Can the garbage disposal and dishwasher, each with its own GFCI receptacle, share the same 20 amp circuit at the main electrical panel?
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3answers
155 views

How can I tell if a breaker uses both phases/legs

Good day. I hooked up Sense monitor by adding a 240v breaker to my panel (bottom 2 slots on one leg). Problem is Sense has detected that my breaker is sitting on two slots that occupy the same phase/...
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29 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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1answer
47 views

Wiring question for detached room

Would it be possible to power the detached room from the breaker box with two 30 amp breakers to the room with UF 10-2 wiring underground from the breaker box and then landed into the junction box at ...
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2answers
84 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 ...
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3answers
81 views

Neutral and ground connected to one bus bar in subpanel; should I change?

At my house, there is a subpanel that serves a pool area, served by one 30 amp 240v circuit. The panel, which I think was installed about 30 years ago, has just one bus bar that the neutrals and ...
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2answers
39 views

PV inverter breaker sizing requirements

I have a PV inverter that is rated at max output of 25A, and the backfeeding breaker in the main panel is a 35A. This is appropriate considering the 25A * 1.25 and round up sizing formula. However, I'...
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2answers
108 views

Flipped off main breaker for repair, unrelated circuit will not come back on

Switched off main to attach ground wire to two outlets in garage (one normal, one GFCI), now separate circuit to attic (feeding one overhead switchable light, one receptacle, doorbell, and AIR HANDLER)...
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2answers
69 views

Ground wires: Do I have this right?

I have 200A load center with a solid bare #6 ground wire tied to a ground rod. Ground/Neutral are bonded in the box. Then run stranded #6 (does it have to bare?) to the 100A auto transfer switch. ...
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1answer
25 views

Outside sub panel between meter and breaker box

On the front of the house I have a meter and below it is a sub panel. I open the cover and there is a single switch in the middle of the panel (looks like a giant light switch) and it is spring loaded....
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2answers
46 views

Breaker Feeding a Transfer Switch

I have 200A service, but I want to add a whole house generator (GENERAC 17k) that has a 100A transfer switch. I plan to use a seperate 100A load center after the transfer switch for the backed up ...
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1answer
52 views

running electric to my detached garage

I'm looking to run electric to my garage . It is about 100' from the garage to the main panel in the house I was going to put in a sub panel in the garage . The only I couldn't find is a 60 amp . I ...
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1answer
57 views

Proper repair of a burnt conductor in a main panel

What are compliant methods of repairing conductors with damaged insulation? Screw to conductor contact discovered when turning power back on after remodel. An irrigation company punched a screw ...
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1answer
57 views

Yet another Electrical Sub Panel Bonding for A Condominium

At a condominium sub panel, which fed by 3 wires from a main disconnect only, where there is NO main panel dedicated to subject sub panel, is it still allowed to bond ground/neutral bar to the sub ...
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1answer
23 views

Issue with powering off an MK brand 32A MCB

I have an MK consumer unit with the house ring main wired into a MK 5932s MCB ( https://www.mkelectric.com/en-gb/Products/CP/sentry/MCBsinglepole/MCBsinglepoletypeb/Pages/5932s.aspx ) Occasionally ...
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1answer
50 views

100 Amp Sub-Panel in Detached Garage - Which Wire and Breakers for Code Compliance?

I am installing a 100 Amp sub panel in my detached garage for a 40 Amp car charger It is 70' away, 30' in the basement and then 40' outdoors. I am going to be running it using XHHW 1/0,1/0,1/0,2awg ...
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2answers
47 views

Best route to take when replacing an old panel without a main breaker

I have a severely scary Stab-Lok panel that has no main breaker. The breakers spark and fall out when the panel is slightly wiggled. It's tiny and there's hardly any room to work, so I'm not about to ...
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2answers
51 views

3 wire existing feed, not connected to main panel. Do I bond ground and neutral

I have a detached garage that has a 3 wire feed, powered from a separate 100amp disconnect from the main panel. Originally the old box had the ground and neutrals together on the same bar. I ...
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1answer
37 views

200A service to 100A transfer switch?

I have 200A service but, I want to add a whole house generator (GENERAC 17k), but my transfer switch is only 100A. Can I add a 200A subpanel (NEMA 3R 12-space with 200A main) on the outside of the ...
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1answer
51 views

Can I install Whole Home Surge Protector into two single pole breakers?

I know that Square D HEPD80 calls for installation into a dual pole breaker but I currently don't have a space that's close to the main lugs since the wires that go to those breakers are very short (...
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2answers
110 views

mini sub panel?

I have a 100 amp box that has only 1 open slot for a single pole breaker. I have 2 unused 240v breakers (dryer and range) I was wondering if its possible to run a sub panel with 2 extra 120 volt ...
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2answers
39 views

Seem to have a voltage problem after reconnecting meter box - how to troubleshoot?

I replaced the wire from the meter box up to the service connection because it was damaged last winter when a tree pulled the wire from the house - although the service man said it was still sound the ...
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1answer
49 views

The side wire screws on my power terminal won't tighten?

I'm trying to add a second plug off of this one. I've done this dozens of times (yes, it's got plenty of space on the circuit). I prefer the side screw method. I loosened the screws, which were ...
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3answers
219 views

How can I connect 2AWG cable to my 100A panel?

I have bought a gazebo (closed) that will serve as a studio and I want to place it on the edge of a wood that is approximately 400 feet from my house. I was planning to run underground wiring from my ...
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1answer
60 views

Sub panel supplied by two different lines from main panel

I looked but couldn't find this asked already. I found a sub panel in the crawl space of my home. It looks to supply an upstairs addition. It has 2 different 14/2 cables going into it from the main ...
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0answers
37 views

I have a ground rod but I have no grounds in the house

My panel is connected to the main water intake jumping the meter and I just installed an 8 foot copper ground rod. Even connecting a new breaker with only one outlet attached to it shows that I have ...
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3answers
56 views

Outdoor service panel replacement

I want to replace my current service entrance panel with a newer 200A unit. My question is about how to route the wires from the meter and from the house into the new box. All the boxes that meet ...
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4answers
67 views

Replace Circuit Breaker on Split Bus Panel

I want to add a 50 amp 220V circuit breaker to my split bus panel to supply a welder. I have two options. One option is to use the empty slot (blue arrow) or replace the spare 220v breaker that is ...
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1answer
62 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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1answer
48 views

overloaded panel, possible load sharing

I have a 100 amp panel, during a remodel the gas appliances were replaced with electric and now the load calcs put it at about 105 amps. I've heard about way to power 2 loads or appliances with 1 ...
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0answers
20 views

Switching to an AFCI breaker, but builder had used a 3 wire/2 breaker setup

I am looking to bring my finished attic to code and I am told I need to replace my existing 2 15A single pole breakers with 2 AFCI breakers. Builder used 12/3 wire for 2 circuits, one going to HVAC ...
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3answers
42 views

Sub Panel using Sub Feed Lugs

We're getting ready to build a detached garage/ADU about 100' from our main house, and have a quick question about getting power out to the building. We currently have a 320amp service to the main ...
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0answers
45 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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1answer
65 views

Three wire vs four wire feed remote sub panel

I added a drawing. of both wiring configurations. The only advantage I can see is the 4 wire gives you a dedicated ground fault circuit vs sharing the neutral wire. Open neutral between the two ...
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2answers
75 views

Does code require that you use only breaker brands explicitly listed on the breaker box, or are “compatible” breakers compliant?

To be clear, there's another version of this question of, "If some random off-brand breaker fits, is it acceptable?" We already know the answer is no to that. As an example, the Westinghouse breaker ...
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0answers
71 views

Can an existing electrical panel be left in place but rotated 1/4 turn (90 degrees)?

Odd as it sounds, the few inches gained by simply rotating an electrical panel in its current location just 1/4 turn during our renovation (so that it faces south instead of west) will allow us to ...
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1answer
32 views

AC Combiner Box for Solar Project

I've been searching online for a NEMA 3R enclosure to act as a combiner for two 40 Amp, 240v circuits coming out of two solar inverters. Total combined amperage is 80 Amps. The AHJ is going to be ...
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1answer
143 views

Adding the Sense electricity monitor to my external breaker box

Hello I'm looking to add the sense monitor to my breaker box outside on the side of the house. It looks like it's full. I took a few pictures of the breaker panel and know that you could add sense to ...
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0answers
27 views

200 amp panel with 3 wire service connected to outside disconnect

If the main panel is feed with a 3 wire service and a generator transfer switch with a service disconnect was added - would it be considered a sub panel?
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1answer
106 views

Why are U.S. residential circuit breaker service panels so poorly designed?

I find as a knowledgeable home DIYer, that my Siemens 200 amp circuit breaker panel to be a pain in the butt to use. It is less than 25 years old, and yet it seems to have been intentionally designed ...
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1answer
60 views

Electrical Bonding for an exterior building

I have to upgrade the service I have for an exterior building. The wiring follows the old code, and I'll need a permit to do it. So I am going to have to update the service and everything to the ...
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2answers
93 views

Run a 15 amp motor on a 30 amp breaker?

I have recently purchased a 220v 15 amp jointer ( 12/3 wire). The only 220v outlet that is nearby is my dryer. The dryer is on a 30amp circuit with 10/3 wire. Can I make an extension cord (say 10/3 ...
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1answer
65 views

Wiring a new shop advice

I am having a new shop built on Friday.The shop is located 250 feet from my power meter. For a 240 volt 100 amp service in the shop, the online calculator says I need 2/0 AWG Aluminum or 1AWG copper....
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2answers
106 views

Wiring Advice for Pole Barn

I am looking to wire a pole barn. To avoid trenching from the box at the meter. I am wondering if I can put a 100 amp breaker in my 200 amp box in my house and pull from there. If so, what size of ...