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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).

6
votes
3answers
143 views

Can I add a subpanel?

Let me start off with the facts: I have 125 amp service that is fed via overhead lines to a center fed panel. I am maxed out on breakers, as every 110v breaker is now a tandem breaker. When other ...
0
votes
1answer
35 views

Use existing 200A panel as temporary sub-panel off of new 320A service panel

Currently I have 200A electrical service that's brought to my house above ground and into the basement on the right side of the house, which feeds a 200A panel. I'm in the process of getting my ...
0
votes
1answer
59 views

Is the blue conduit connected to my sub-panel suitable for a 50A branch circuit?

I have to add a 50 amp circuit to the sub panel in my garage. I found one of the open knockouts in the top of the panel to have a blue flexible conduit looking stuff in it which runs up into the ...
2
votes
0answers
75 views

What size sub-panel and wire do I need for my three-season room?

I have a 15x22 room that is roughly 50' from the main panel, that I am converting from a 3 season room, into a conditioned space (heating and cooling, enclosed with windows and doors, etc.). ...
1
vote
1answer
42 views

How to deal with subpanel that does not have ground wire back to main panel

I am in the process of renovating a house that was built in 1933, and had an addition put on in the 1960's. Original 1933 panel is 100 amps. When the addition was put on, the electrical drop was ...
1
vote
1answer
55 views

Junction box above ceiling to add second sub panel from existing sub panel feed

I'm posting this question to determine if there is a safe manner to do this that meets code and isn't a redneck solution. The sub panel in my garage is run off a 50 amp breaker that is in my service ...
1
vote
1answer
47 views

Basement Sub-panel Breaker Size

I am confused about small-appliance branch circuit for service load calculation. I am trying to size my breaker for a sub-panel in my basement from my main 200A panel. I will have a main room, wet ...
2
votes
1answer
208 views

When did the NEC code start to require the separation of neutral and ground bus bars after main disconnect?

You gave the answer below to the question of the requirement for separate bus bars after the main disconnect box ... my question is ... In what year did the NEC start to require this separation? What ...
1
vote
1answer
59 views

Can I do subpanel this way?

I need 240VAC, single phase, 27 kW at 113 amps. Required breaker is 3 x 40 Amp I don't have enough space for (3) 40 Amp in my panel. Question is: can I kill 30 Amp (hot water heater) breaker and ...
3
votes
1answer
45 views

Adding subpanel to a shed

Thanks in advance for anyone providing insight for me. I apologize if answers for my situation can be found in another post that I've missed. I have a shed outside my home that currently has no power....
0
votes
0answers
32 views

Garage/workshop

Trying to figure out what amperage I can run to a subpanel to a newly built detached garage. It is a 576 square foot shop (24x24x12). My home has a 200amp service panel form the meter. It currently ...
4
votes
2answers
117 views

What conductor and burial depth are appropriate for my garage subpanel circuit?

We are building a 2-story detached garage. The upstairs will be my wife's studio. She is a painter and quilter. The lower level will be a standard garage for tools, etc. I do not plan to weld but who ...
0
votes
1answer
25 views

Wiring a compressor to an external building

I have run 2,2,2,4 in conduit underground to a 100amp box. In the house the ground an neutral are bonded together but in the shed they are separated(isolated). I'm connecting a compressor through a ...
2
votes
2answers
36 views

Metal or PVC Conduit in Metal Outbuilding?

I'm running wiring under ground from main panel to 100 amp panel in metal garage. When installing lighting and receptacle circuits mounted against interior walls, does it make any difference what ...
2
votes
3answers
88 views

Turning 100A Main to subpanel of 200A new main

I have a 100A old-style circuit breaker main (~1970, 2 conductor & ground) in the basement. I want to upgrade the circuits in the garage to allow for solar panels and PEV cars, so my thought ...
1
vote
1answer
79 views

How to wire main feed in a tiny house subpanel for 120v and 240v?

Initially, I'm going to be plugged into basic 120v from an outlet. However, I'll be moving in a year, and want to be able to plug into 240v if available. How to achieve this flexibility in the ...
1
vote
0answers
93 views

Adding sub panel, odd main panel configuration

I am in the process of adding a sub panel to a detached garage and I have the proper gauge wire connected up to the sub panel (neutral and ground NOT bonded) with 3 conductors + ground running in ...
0
votes
0answers
48 views

What size and type of wire do I need?

We have a 200 amp service on the pole. We want to run to a subpannel in the house. What size wire do I need to run from a 200amp meter pannel on the exterior pole to the subpannel in the house? The ...
0
votes
2answers
49 views

Other than unforeseen surge in draw, what can cause breaker tripping?

My house originally had a single main panel, 150A. Some years ago, I decided to split the basement apartment and the main unit. The original main panel is in the basement but I wanted the main unit to ...
0
votes
1answer
104 views

Yes, I'm dumb - I drilled into wall backing my electrical panel

so... I was drilling into a wall and the drill was having a hard time. I figured I just needed to keep going and I did and it finally went through. Afterwards I realized my electrical panel was ...
0
votes
0answers
30 views

60A sub panel located 220' from source…in conduit..what guage al wire to meet ONT Elec code?

I want to wire a 60A subpanel that is 220' from the main source. The wire will be AL and run through a buried conduit.... Must meet Ontario Electrical code
2
votes
2answers
46 views

Powering Subpanel from CSED via Feed-Through Lugs

I'm wiring my house and would like some feedback on the sizing and routing of conductors between the exterior service entrance and an interior subpanel. On the outside, I have installed a combination ...
5
votes
2answers
241 views

Why does my subpanel have 4 wires feeding into the lugs?

Background: This is a sub-panel for my pool equipment (filter pump, cleaner pump, and pool light). The wires coming from the main panel come in through the bottom, and the wires going out the left ...
1
vote
3answers
219 views

Can I install a 60A main breaker in a load center rated for 125A?

Following my previous question about feeding a sub-panel... I have access to a new-in-box 125A load center, which is more current than I need, but the form factor is good. Can I drop to a 60A feeder ...
1
vote
0answers
31 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 ...
3
votes
2answers
112 views

Question about subpanel install in a shed

I am not an electrician, so let's get that out of the way. However, in the past I have installed simple subpanels in detached buildings and had my electrical work inspected and passed first time, so I ...
0
votes
3answers
81 views

Old Fuse Box Used As A Subpanel

Home built in the 50's has a fuse box that's currently being used as a subpanel in the garage. The garage is attached to the house by the means of a 8 foot wide enclosed breezeway/mudroom. My problem ...
1
vote
2answers
151 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 ...
0
votes
2answers
64 views

2 pole 240v AC circuit breaker wire connections

If the neutral is not needed on a 2 pole 240v AC circuit to what should it be connected? My new oven has a black, red, ground, and a white wire. The wire from the circuit breaker has the same 4 wires. ...
1
vote
1answer
77 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 ...
0
votes
1answer
139 views

about NEMA 6-15 plug/receptacle for 240 V

The NEMA 6-15 plug/receptacle for 240 V power supply looks like the following: https://en.wikipedia.org/wiki/File:Nema_6-15.svg The two hots obviously should be connected to the two hot wires in the ...
1
vote
1answer
103 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 ...
1
vote
2answers
127 views

Should the ground lug be bonded in my sub-panel?

I have 200 amp service at the house. I want to install a DP 60 amp breaker in that panel and run # 6 wire approximately 150 feet (10% added for swag) overhead to a dog rescue building. The building ...
1
vote
1answer
172 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 ...
1
vote
2answers
233 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 ...
0
votes
1answer
91 views

How can I connect a sub-panel to an unused 60A breaker in another panel?

So I have a contractor installing a gas furnace where I used to have an electric furnace. I am ending up with a 60a circuit that is not needed anymore. I want to take that circuit and install a ...
0
votes
2answers
1k views

100 AMP sub panel from 200 AMP main

Installing a new sub panel in my detached garage, about 90' from the main panel. Half of the distance of the run will be under the house and the second half underground to the garage. I have read that ...
1
vote
1answer
190 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'...
2
votes
2answers
402 views

Is it possible to make space for a double-pole breaker in this panel?

I need to add a 90A double-pole breaker to the service panel on my house to feed a subpanel in a detached garage. It is a GE that uses Q-line breakers. Looking at the current layout, I'm not sure it ...
2
votes
3answers
606 views

Is 8/3 stranded wire ok to power a 100amp subpanel?

I have an old 220 (8/3 stranded with grnd) line off the main box from a stove that I don't use anymore (we have gas now). I want to use it to install a subpanel in my attic. The subpanel is 100amp, 6 ...
0
votes
1answer
42 views

Calculating sub panel capacity

I am creating a sub panel which will contain 20, 20 AMP circuits to provide power for 20, 1,000 watt, 120v stage lights. My calculations suggest that the light loads, which are constant, will require`...
0
votes
1answer
312 views

What type of wire and load center for subpanel in detached pole garage?

I am installing a 60 AMP subpanel in a detached pole garage 150 feet from the house. Garage subpanel will be supplied from an existing 100 AMP subpanel in the basement of the house (running from the ...
1
vote
3answers
374 views

Adding a sub panel in my basement

I want to add a sub panel in my basement. The main panel is in my garage, the next level up. The distance from the main panel is roughly 10 feet. The main power comes in through the basement and up to ...
2
votes
2answers
77 views

Move grounds to subpanel when I moved 8 single pole breakers to same subpanel?

When I move 8 breakers from main panel to a subpanel (a few feet away) can I simply move the hot and neutral only to subpanel? The 8 breakers are grounded in the main panel already. A 100 amp breaker ...
1
vote
0answers
86 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 ...
2
votes
1answer
99 views

Does a sub-panel require its own local main breaker?

When one goes to install an electrical subpanel is it required to install a "main" breaker in the subpanel to shut off all the circuits in the panel? Or is it sufficient to just have the feeding ...
1
vote
0answers
293 views

Wiring 100 Amp subpanel

I know this subject seems to be debated to no end but I have a few questions/comments. My main service panel is in my attached garage and I want to add a 100 amp subpanel about a foot or 2 to the ...
14
votes
2answers
2k views

Considering doing a 100A sub panel install on my own. Any guidance would be much appreciated

My background: I am an Electrical Engineer by schooling and I'm a pretty handy guy overall. I have been working on and around just about everything since as long as I can remember. I have a good grasp ...
3
votes
4answers
955 views

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 ...
0
votes
1answer
120 views

Installing a sub panel

Installing a sub panel solely for outdoor Christmas lights/decorations. I will need approximately 120 amps now, with more to be added later. My current main panel does not have enough open slots for ...