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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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20 views

Shared Neutral for Hot and Line Side of AFCI Recepticle

Good Day I am planning a MWBC. At the start of this circuit will be an AFCI Recepticle in a Hallway. This will then Branch to Hallway Lights in one direction, and Dimmer Lights & a second ...
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1answer
75 views

Some odd wiring in my breaker box. Is this up to code?

I'm poking around in my breaker box and I notice a white wire screwed into the ground bus. Tracing it back, both bare and white are on the ground bus and the black is screwed into a breaker. Is this ...
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1answer
27 views

how to properly seal protective sleeve entering electric panel

There is a good picture of what my panel will look like at https://www.ecmweb.com/qampa/stumped-code-2 I don't want to copy their picture over here so I'll describe the situation: I'm adding electric ...
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1answer
131 views

Why is one mounting screw left behind each electrical panel's cover?

I have three electrical panels in the house and with each one, one of the face screws is under the cover as seen in the picture. So it's clearly intentional. What's the purpose of it?
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1answer
46 views

Vent hood throwing bedroom breaker

Let me start by saying that electrical is not my strongest area. With that being said, I'm experiencing an issue where the breaker for two of my bedrooms is thrown approximately a minute or two after ...
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1answer
33 views

Adding subpanel to transfer switch

I have a transfer switch that connects one of the line sides directly to the main electric meter breaker. The load side of the transfer switch goes to the interior in cement main service panel. Due ...
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1answer
33 views

Sub panel for 8 double pole breakers

I need to wire 4 220 Volt Inverter ACs, a 220 Volt Water Heater, and a 220 Volt well pump. I'd like to have at least 2 empty spares. What type of BR Breaker box should I look for? Is something like a ...
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1answer
60 views

Questions regarding my plan for new 50A circuit (with pictures)

Overview Pictures/diagrams at the end. I will pull permits and would like to do this correctly. I will be disconnecting an unused 40A circuit and replacing it with a new 50A circuit to my garage for ...
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2answers
64 views

Single neutral bus bar in subpanel with 2 columns of breakers?

(Questions in bold at the bottom) I recently purchased a Siemens E0816ML1125S load center for use as a subpanel in my basement: I installed a ground bus bar, located horizontally under where the ...
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2answers
37 views

Meter and service panel separate from house

I am renovating a farmhouse that has been unlived in for 8-10 years and has had power disconnected for that amount of time as well. The previous owner in order to test a well without changing/fixing ...
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1answer
54 views

Stuck screw in subpanel neutral bus

It appears that I need to add one more neutral to the neutral bus. There is one unused screw on the bus but the screw is stuck. Any suggestions on how to loosen it up would be helpful. Do electricians ...
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1answer
25 views

Add sub panel from transfer switch

I'd like to add a subpanel to add a couple circuits (Extra inverter Mini Split ACs, well pump, etc.) but my main interior panel is full and recessed in concrete. I added a manual transfer switch from ...
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2answers
41 views

can a top/bottom feed style sub-panel be fed from back of panel

I have an Eaton main lug load center that is listed as top or bottom feed. I had to run EMT through a wall to the back of the panel. Is it legal to use a knockout in the back of the panel (top part ...
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1answer
72 views

no ground bar in electrical subpanel

I found that the subpanel in our newly built home may not have ground bar, though it has neutral bar. I attached photos for confirmation. Please let me know if there is any code violation. The house ...
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1answer
42 views

Wiring Options for 14/3 NM-B Cable and Two Single Pole 15 Amp Circuit Breakers

A 14/3 NM-B cable is run from the main breaker panel. The black wire is connected to one 15 amp single pole circuit breaker and the red wire is connected to a second adjacent 15 amp single pole ...
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1answer
58 views

What's the purpose of a dual two-pole breaker? [duplicate]

I have one of these breakers in my panel? What is its purpose (vs a pair of two-pole breakers)? There are other posts that deal with tandem breakers but not specifically dual tandem breakers.
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2answers
103 views

Code: How can a transfer switch not switch neutrals?

I'm looking at this Reliance Controls transfer switch. I certainly won't buy it and don't recommend one, but the huge hank of wires going from switch to panel only has one neutral wire in it. How ...
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2answers
60 views

100 amp transfer switch for 125 amp home

A local electrical shop tried to sell me a GE 100 amp transfer switch. My main electrical panel breaker is 125 amps. Would this be ok?
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2answers
61 views

Can a single pole (normal/regular) circuit breaker be used in spots designated for tandem?

I recently purchased a house that failed inspection because of some oversized breakers. Of course, I had the seller get the circuit breaker fixed before finalizing the purchase, but I feel it is ...
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4answers
88 views

Running appliances during a Power Outage

My parents are elderly and live in an older house, late 50's. Their house is a ranch style about 1,250 square feet with a full basement. They have a sump pump in their house and when it storms and ...
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1answer
79 views

Breakers loose in panel a problem?

So I had an old panel and subpanel replaced with a single new panel. The guys reused the old breakers, and the breakers wobble in the panel like loose teeth. With the old panel, they didn't wobble at ...
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1answer
52 views

Is a Redundant Ground at Sub-Panel Permitted? Useful?

I've searched the forum and haven't found an answer for this exact situation. Here's the configuration: Main 200A service panel at one end of house (exterior), and 100A sub panel at opposite end of ...
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3answers
60 views

Ganged Circuit Breaker has strange ganging configuration. 40-[30-30]-40

I have a scenario where the Circuit Breakers for a Dryer and a Range are intertwined in the CB panel. In the picture below 17 and 20 are ganged together with that wild ganging clip. 18 and 19 both ...
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0answers
29 views

New Circuit Faceless AFCI tripping with no load

Most AFCI questions here revolve around existing circuits, and AFCI Circuit breakers, but my situation is a little different. Here's the details: Renovation to add a half bath and laundry room in ...
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2answers
96 views

Installing a sub panel to a GE split bus panel

I want to install a sub panel to my GE split bus panel. The diagram indicates that I could replace the two full sized 2-pole breakers (2 inch wide each) on the upper left with three compact 2-pole ...
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0answers
28 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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1answer
36 views

Maximum wattage from a 125 amp panel

I would like to know what is the most amount of Watts that a home can theoretically draw from a 125 amp system. I know that the formula is W=A X V, but since a home has 2 120V lines on "split phase", ...
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2answers
76 views

How to make room for a taller electrical panel with a vent pipe underneath

In Seattle in the US, I currently have a 24" tall split bus 200A electrical panel and I'd like to upgrade to a 36" panel for more capacity and to get main breaker. Unfortunately the laundry sink (you ...
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1answer
28 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 ...
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2answers
74 views

EMT to Top of Panel

I'm installing a NEMA 14-50 in the garage with a dedicated 50amp breaker. I have run the 6/3 romex through the attic and am at the point where I'd exit the attic to the exterior of the house and down ...
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0answers
55 views

How can I make both sides of a 2 pole breaker box hot so that I can install a second breaker?

I have recently installed a swimming pool and I installed a breaker box at the pool. The breaker box is wired to the breaker box in the garage.The box is a 2 pole. 1 one side runs the pump I'm wanting ...
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2answers
112 views

What are good uses for tandem (double-stuff) breakers?

Pretty much all of the advice regarding panels here revolves around the idea of heavily oversizing your breaker panel to avoid running out of spaces and to avoid needing tandem breakers. Especially ...
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3answers
157 views

Circuit requirements add up to more than 200 amps?

We are remodeling our 2,750 sqft 4-bedroom home to add two basement studio units. The home is 1910s and I'm rewiring the 200-amp panel as I go along, and trying to plan circuits wisely to leave enough ...
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2answers
53 views

Will a bryant compatible 60amp breaker fit a #2 wire?

I looked up size for #2 and it says just over a quarter inch. I'm concerned a 60amp breaker won't fit a #2. I have an older Bryant panel. Maybe breaker manufacturer makes a difference or I must ...
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2answers
128 views

Can I replace two 15 amp fuses with 10 and 20 amp fuses?

Currently I have 4 x 15 amps fuses. My question is: Can I change the left fuse shown in the image with a 10 amps fuse and make the other 20 amps? Would that work? Edit: There's another one behind ...
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1answer
63 views

If I replace my main panel, will I need to fit AFCIs?

Code is NEC 2017. My existing main panel has plenty of ampacity but few spaces, and thus, is totally full. I have several potential paths for an upgrade. One involves fitting a subpanel and ...
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1answer
69 views

Lost one phase in main panel

It seems I lost a power from one of phases feeding the panel. The pen tester proofs that. It's interesting if I reset the main switch, the power comes back. If I put any appliance (be it a small light ...
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3answers
168 views

Does this electrical panel meet code?

I'm finishing my attic and need to wire it (about 8 outlets and 14 LED recessed lights; also a half bath with GFCI outlet, fan, vanity light). I have gotten four electrician bids. Two said my existing ...
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1answer
91 views

Can I come off the meter box to add a 60 amp subpanel

The service to our house is buried. The transformer sits beside our meter post. The 200 AMP service main panel is 130 ft from the meter post in the house. The unattached garage and workshop are 30 ...
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1answer
52 views

Proper way to protect wires into top of surface-mounted electrical panel

What are the Code requirements for protecting wires going into the top of a surface mounted electrical panel? Do the wires need to be in a conduit from the top of the panel into the ceiling above? ...
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1answer
102 views

Proper grounding and service wire choice for remote load center, RV pedestal

I'm setting up a trailer pad at home and will be running service to a load center for the trailer and additional power to back yard area (about 100'). My only question to resolve is the proper way to ...
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1answer
76 views

Why are some electrical systems only two phases of a three phase system?

I setup a kiln at our building, and I realized that the electrical system is setup with a three-wire feed - two hots and a neutral. This is fed from a three phase system, though, so the voltage over ...
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1answer
114 views

Should I make space for a new 50A breaker in a full panel or install a sub-panel?

I'll start by saying we just bought a fixer-upper house. I searched the topic of adding sub panels and a lot of the answers are a bit over my head so I need some advice. My house was built in the 20'...
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1answer
76 views

Is any depth change allowed on electrical panel wall?

I know the NEC requires clear space in front of a breaker panel. What depth of wall change would violate this? My basement, where the panel is, has a 6" jut where the block wall becomes timber. So ...
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0answers
45 views

What breaker size do I Need?

I have a 65 foot run from an eaton panel to the 125 amp panel, and I'm installing 3-phase. what breaker size do i need to install in the eaton panel. I was Planning to use #2 THHN wire.
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35 views

Ground wires under two lug nuts

In the main panel I noticed all of the ground wires are secured under a total of two lug nuts. Is this ok?
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2answers
70 views

Does this main service panel require blocks opposite main breaker?

This Murray Model 18 is the main 100A service panel to a residence in the U.S. It uses Cutler-Hammer BR-style breakers. I'm confused because the panel cover blocks the two bus slots on the top right,...
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1answer
152 views

Where should arc fault breaker not be used?

I'm trying to stay on top of the electricians rewiring our house and correctly interpret the NEC 2017 for arc fault breakers. There is a permit and an inspection when they done, but I want to ...
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0answers
54 views

Difference between E-Trip circuit breaker and Mechanical Trip breaker

Trying to order a 19" distribution breaker panel. All small loads, (3A..7A) but I am being asked do I want Mechanical trip or E-Trip bullet breakers. The description on their quotes say Electro-...
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3answers
178 views

What is the purpose of the twin single pole breaker?

I just moved into a rental property and was doing some electrical work such as replacing ceiling fans and outlets (reimbursed of course). When working with the breaker box, I encountered breakers I ...