Questions tagged [subpanel]
For questions about an [electrical-panel] that is fed from another [electrical-panel] instead of being fed directly by a utility service or separately derived service (such as a generator or inverter).
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What wire gauge do I need for a 100 Amp subpanel at the end of a 60' wire run?
I am adding an attached garage to my house. I'm going to be putting in a 100 Amp subpanel which is about 60 feet away and run through the basement joists.
What gauge wire do you recommend for ...
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How to properly ground a subpanel in detached building?
I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
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What size wire should I use to feed a subpanel in my garage?
My main panel has been upgraded to 100 amps. I would like to add a subpanel in the garage which would supply:
20 amp Mig welder running on 120 volts, but later upgrade to a larger Mig welder as i ...
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Can I feed 2 sub-panels off one breaker?
I have a 225A main service panel. I also have 2 sub-panels with 125A and 200A ratings respectively.
There's a 100A 2-pole breaker in my main panel. I want to feed both sub-panels from that single ...
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How do I determine the fill rating of a conduit?
I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
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Can I install a Subpanel (in a seperate building) using a 3 wire connection (2 hots and 1 grounded neutral)?
Can I use a 3 wire connection (2 hots and 1 grounded neutral) to install a sub panel in a separate structure if I install a separate ground rod to the grounding bus in sub panel?
I have 8/3 w/o ...
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Why does a subpanel need separate ground and neutral?
Why does a power sub panel have to have separate neutral and ground bars other than code satisfaction?
Does a sub panel need a main breaker if there is one at the main?
Also, does the sub panel ...
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How do I properly ground my subpanel that only has one neutral/ground bar?
I am adding a sub panel in an unattached building. My sub panel has the connection for the 2 hot wires coming from the source panel (a 40 amp double breaker) In addition it has one neutral/ground bar ...
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What size wire should I use for a 60amp subpanel?
I am installing a 60 amp subpanel in a workshop in my backyard and I will have 2 - 20 amp services with 4-5 outlets on each and 1 - 15 amp service for lighting. The length from the main panel to the ...
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Running electrical to a shed
I have a shed in my backyard about 200ft from the house. I would like to run electrical to the shed to install 2 or 3 power outlets, and two LED lights for the inside.
Currently from the house to ...
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How to determine the correct capacity for a sub-panel for a shop?
I plan to install a sub-panel for my woodworking shop, and would like to determine the total capacity that should supply that sub-panel. These are the main items that will likely be running in the ...
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Is it ok to use a ground rod at a subpanel instead of a fourth wire?
I understand running the neutral wire back to the main service panel and not bonding the subpanel... but running the equipment ground back to the main panel seems to get conflicting answers.
If ...
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2 wire sub-panel corrective action
Can I correct 2 wire supply by adding a bare copper wire buried to sub-panels?
I have two out-buildings with sub-panels fed by 6/2 wire w/ground.
The main is 100 amp The sub-panels each has a 50 amp ...
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Can SER labled XHHW-2 be buried in conduit
I've read many good answers here regarding what types of cables (conductors) can/cannot be buried. I've come across blanket statements like "SER cannot be buried, even in conduit." I want ...
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Can I do a 125A subpanel feeder with slightly-larger-than-#3 wire?
How they are all connected:
With all the details and data given below. So Can I do a 125A subpanel feeder with slightly-larger-than-#3 wire?
This is detail directly related to the post.
Question. ...
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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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Three wire vs four wire feed remote sub panel
I am trying to understand how this works and why the code changed. In this case you have a detached shop 250 feet away with no plumbing or other connections to the house with the main panel.
The ...
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Grounding requirements for main panel and subpanel
I recently had my main service professionally upgraded to 200A and had a 60A subpanel installed in my master suite to support future additions. All work passed city inspection, for whatever that's ...
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8 AWG solid EGC in raceway for 100 amp subpanel
I'm adding a 100 amp subpanel to my detached garage and have a question about the EGC I've already pulled through the underground LFNC-B raceway.
Taking the advice from a similar post on this forum, I ...
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100a Subpanel - Detached Garage Plan Review with Schematic
Previous Conversation below. Here is the revised plan - which now includes #6 Bare Copper wire throughout the run from main panel to new sub panel.
Is this plan good to go at this point? Would you ...
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100 AMP garage sub-panel from 200 AMP house
I've checked a number of the other questions but not finding the specific answer I need.
I'm wiring a 100 AMP garage sub-panel from a 200 AMP main in my house. I plan to install a 100 AMP circuit ...
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Space requirements for first subpanel and wiring preference
I would like to install two subpanels and my main panel is full of breakers. Would it be better to feed both subpanels directly from main or have 1st subpanel off main and 2nd subpanel off 1st ...
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20A & 30A dual feed into subpanel
Okay so this is my first shot at this question, but not my first time trying to research the subject. I am in the process of designing a tiny house and have started thinking electrical. NOTE : I will ...
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How to determine what type and gauge of wire should used for underground wiring to a detached subpanel?
I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
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Should neutral be bonded to ground in main and subpanels?
I had a licensed electrician replace my main panel and also install a subpanel in my garage. At the time I knew nothing about electrical, and now I know just barely more than nothing. I have ...
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Cabin Wiring Plan Revisited
OK, So I’ve update my wiring plan … see images. I have more details now, such a part numbers, specifications and ratings, etc. I’ve consolidated much input from a couple of forums as well as Stack, ...
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Can I have a larger breaker in a sub panel than the size of the breaker in the main panel feeding it?
I have a 200amp main panel and a 200amp sub panel, a foot apart in my house. Concern I have is from the main panel a 100amp breaker feeds the 200amp sub panel. Is this correct?
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On a outdoor subpanel can the grounding rod wire be bonded directly to the inside of the metal electric panel?
On an outdoor sub panel with grounding rods can I bond the grounding rod's wire directly to the inside of the metal electric panel, and then attach all the other ground wires to a grounding bar. The ...
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Correct wire and conduit to extend a 30 amp circuit 350 feet?
I'd like to check my plan before contacting an electrician. I plan to install a 30 amp RV connection in a wet environment approximately 350 feet away from a 200 amp distribution panel. Based on ...
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Why are all the neutral wires in a sub panel burnt or melted?
My barn had a small (6-space) main lug sub panel with four 20A 120V breakers and one 20A 240V breaker. The panel itself was protected by a 50A 240V breaker in the main service panel. It was wired up ...
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Would running a new subpanel in parallel meet NEC requirements? If not, what should I do?
Background
U.S.A. Voltages/power present.
My house has a 125A Power Mains breaker at the street.
A buried line runs from the street breaker to my main panel on exterior wall outside of house.
The ...
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200 amp service entrance to 200 amp sub panel?
I have a 200 amp service entrance outdoor breaker box. I want to install an indoor breaker box with 200 amp service about 5' away so I can access breakers from inside the house. The actual wire run ...
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Can an electrical subpanel go underneath plumbing?
I was about to wire up my new basement subpanel when I realized I had put it directly under a toilet.
I don't think this is a code violation. I can relocate it with some difficulty. I'm also ...
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What wire and conduit is required for an attached-garage subpanel?
To make my garage more usable as a workshop, I'm planning to add a subpanel which can feed a number of additional outlets. 60 amps would be plenty for my current needs, but I'd like to go with 100 so ...
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Adding critical-loads sub-panel with a PV install, rationale and ampacity calculation
I'm considering adding a critical-loads subpanel near my main load center, in conjunction with a small grid-tie solar system, and with connection for backup power. Please critique my rationale for ...
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Adding second Ground Bus to Square D Sub Panel - Grounded via wire or just the screws?
I have added a sub panel next to my main panel. It is fed from a 100A breaker using 3-3-3-5 CU Service wire. I removed the ground screw to isolate the Neutral and I installed the ground bus that ...
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Can a sub-panel have a larger main breaker than the feeder breaker in the main panel?
I have a weird setup that I'm trying to configure, but I'm only 90% certain of my logic (and with electrical items I want to be 100%).
I have a new 400A meter/main combo unit with 1 built-in (...
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What should I do if the AFCI breaker neutral pigtail is too short?
I am wiring a house that I built, and code says I need an AFCI for the bedroom circuit.
The panel that I will be installing this AFCI breaker in is a subpanel, so my ground/neutrals are on 2 ...
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Subpanel has neutral and ground bonded in detached structure - should I isolate?
I have a detached garage built in 1979 with a Cutler Hammer subpanel with a 3-wire 8AWG feeder (hot/hot/neutral) on 40A breaker from the main house panel. Subpanel has a dedicated ground rod ...
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Adding a new "knockout" to side of main electrical panel
I'm planning on running a 6/3 feeder cable from my main panel to the garage for a small 50A subpanel and am unsure of how to plumb the new cable to the main panel. All of the knockouts are on the ...
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How do I convert an existing electrical panel to a subpanel?
I'm going to upgrade my existing electrical service from 100 amps to 200 amps. Along with the service upgrade, I'll be moving the location of the service drop (part of a larger home remodel). I want ...
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What type of wire should I use to feed a 70 ampere subpanel?
Finishing a basement and I need to add a subpanel. Main panel is outside. Subpanel will be in the basement. 70 Amp breaker in the main to feed the subpanel. I was thinking THHN but would this mean ...
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Arc-fault breaker in sub panel, pigtail to neutral bus or ground bus?
I recently replaced an arc-fault breaker in our subpanel that I thought to be faulty (it kept tripping at strange intervals around when I added a new dimmer, but I found no issues with my dimmer ...
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How can I install an electrical panel when the stud cavity is too narrow?
I am installing a sub panel in my garage and ran into a problem.
I have the usual 14" of space in the stud cavity but the problem is that the subpanel I bought is 14 1/4" wide. I'm wondering what ...
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Can I run a ground wire along the outside of conduit?
I have a sub panel on back of house. From main in garage is three wire. 2 hot one neutral. NO GROUND WIRE. Sub has a single bar used as neutral and grounds. Its bonded to case (Screw in). I will ...
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Running 100 amp line to detached garage
I found lots of questions about this, but with many different answers.
I'm looking to run a 100 amp line from my 200A main breaker box to a subpanel in my new detached garage. The run is about 120 ft....
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Can I add a sub-panel near the main disconnect outside my house?
I have an outside main disconnect of 125 amp and a inside main panel. The disconnect panel outside has an extra space that will accept a dual pole breaker. What I would like to do is add a sub-panel ...
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Grounding subpanels located ~100ft from main breaker
Based on this question on EGCs in conduit (in the context of branch circuits) and this question on conduit as a sole ground source, I would like to know whether two subpanels, located ~100ft from the ...
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Is 50 amp subpanel allowed in Seattle area?
I am in Seattle area and planning to add a subpanel right next to main panel in garage. For my purposes, a 50 amp subpanel work would fine.
As my main panel is completely full, I would either need to ...
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How to join two electrical boxes through a wall?
I'm replacing a 1960s vintage sub-panel for my laundry and air-conditioner. I'm also looking to install a disconnect at the A/C compressor. The new sub-panel is inside the wall of the laundry room, ...
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