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).

Filter by
Sorted by
Tagged with
1 vote
3 answers
72 views

Insulating a communications panel from attic heat

I have a security system/cable tv coax/phone/LAN distribution panel in a closet off an upstairs hallway whose back is open to my attic. I have never really worried about the heat that comes through ...
1 vote
4 answers
98 views

can I run my sub panel from lugs in main breaker panel

I need to run a sub panel box right next to the main panel box to add am40 amp double pole breaker for a range. I have seen where u can use say a 60 amp breaker and have the wiring coming from the ...
3 votes
1 answer
214 views

Separating Ground and Neutrals in Mainpanel before installing sub panel

I'm planning to get a 100 amp sub panel installed in my garage but got conflicting opinions on a point from different master electricians. The point is one electrician is saying it's a must to ...
  • 133
1 vote
4 answers
115 views

Have 2 meters/2 services for 2 structures - need to remove one meter and retain 2, 200 amp panels

I have a garage and a house on my property and each of them have their own meter and 200amp panel. This was setup decades ago when original owner ran a business out of the garage. I would like to ...
  • 11
3 votes
2 answers
131 views

Should I replace a 1930s 2-circuit subpanel with just a junction box or a small modern subpanel?

We have an old original subpanel located (ridiculously) in the second floor bathroom 2’ from the sink in our 1937 Cape Cod style home. Our upstairs has two bedrooms (sans overhead lights) and 1 ...
  • 87
2 votes
0 answers
35 views

Appropriate SER cable routing under heat duct

I am routing a 2-2-2-4 SER AL Cable from my main panel to a subpanel in an attached garage, through the overhead joists in my unfinished basement. Should I route the cable as shown in route A, which ...
2 votes
0 answers
39 views

Subpanel wiring problems

About a year ago, I installed a secondary breaker panel in my detached barn. It is a very simple set up. I added a 50 amp single pole breaker on my main panel in the house, ran #4 wiring in conduit ...
  • 21
0 votes
1 answer
72 views

2-2-2-4 AL SER Cable is short. What are my options?

I have a 2-2-2-4 AL SER cable from my main panel, up, and in a straight line, perpendicular and through the overhead joists of my unfinished basement. I am feeding it through the last joist into my ...
7 votes
1 answer
641 views

Old service entry cable left inside former main service panel

My Stab-Lok split bus subpanel has what I assume to be the previous service entry cable still inside. The black aluminum wire is spliced together with 12 gauge copper wire on a 20 amp circuit. The red ...
  • 71
0 votes
0 answers
57 views

Breaker for subpanel keeps tripping after rainstorm

My neighbor has a large main panel where pg and e comes in, and his panel has a breaker that feeds a subpanel which sends power to a cabin(mine) my landlords shop, her house and some outdoor gfi ...
3 votes
1 answer
164 views

Running conduit horizontally through wall that divides house and garage

I am installing a subpanel in my attached garage and thought I had covered all the bases when running PVC conduit horizontally through the wall between the house and the garage. The wall has 5/8 fire ...
0 votes
0 answers
42 views

turn 50amp 240v into a subpanel with 30amp and 15amp

I have a 50amp 240v line that came with the house that is for my oven (comes from the main panel). I'm getting a new oven that needs 30amp 240v and a speed oven that needs 15amp 240v. Can I take my ...
  • 101
0 votes
2 answers
89 views

Utilizing 240v from an abandoned dual-pole 30amp breaker for subpanel

Helping my dad with a walk-in tub installation and need dedicated 20amp line. In effort to avoid cutting up a major part of the basement ceiling to access main house panel, I'd like to use an ...
0 votes
2 answers
49 views

Where can I put my subpanel?

I am installing a subpanel in my attached garage to support a garage heater. The SER feed is coming through the garage wall that is shared with the house, near the bottom of the wall where it is a ...
2 votes
1 answer
68 views

Is my plan for connecting a new electric oven sane?

I'm remodelling my kitchen. Currently it's set up for a plug-in electric range, with what looks like a 14-50R outlet, fed by a 3-8 AWG cable protected by a two-pole 40 Amp breaker. My new setup ...
  • 353
0 votes
2 answers
66 views

Does SER Feeder need to be protected in an unfinished basement?

I am working on adding a sub-panel to my main panel. I have 200 amp service, and I am putting in a 175 amp subpanel (using this: HOM2175BB) and running 4/0-4/0-4/0-2/0 AL SER approximately 60 feet (...
  • 63
0 votes
1 answer
48 views

Adding ground wire to sub panel

I have a service drop 50’ from my cabin. 2 runs of 1/0 aluminum underground wire (3 wire system) were run underground in 2” PVC conduit pulled in to a junction box and then one run was wired into the ...
  • 1
0 votes
1 answer
103 views

Generator interlock on subpanel

We have 400 amp service in our house. There are two 200 amp subpanels. The one is the primary subpanel for most of the house that would need a generator connected to it. The main box is outside and ...
2 votes
1 answer
53 views

How can I identify the model of this enclosure / sub panel?

The only label I can see says "UL listed class CTL enclosed panelboard GJ 478042". I know it works with type BR breakers. The breaker in the photo is a brand new Eaton BRN120A1CS (20 Amps, ...
1 vote
2 answers
65 views

Feeding 2 subpanels from one main

I have 2 different electrical projects going on: running electric to a detached garage and running electric to a shed. I would like to put a subpanel for each. The garage I would like 200amps and the ...
  • 11
0 votes
2 answers
115 views

Which electrical panel is the main and which is the sub?

In my home I've got 2 electrical panels. Presumably one is the main and the other the sub, but on the surface I can't tell which is which. How can I properly identify?
  • 686
1 vote
2 answers
105 views

What gauge wire for a 70A subpanel at 100 feet?

I want to place a sub panel on the opposite side of my house (from my main panel) on the outside so I can run a heater in our new green house as well as some outdoor power boxes. I'm either going to ...
1 vote
3 answers
117 views

Can I run an electric conduit through abandoned dryer duct?

I relocated my dryer from the garage. The old duct is approximately 5 inches in diameter and runs under my house, through the cement slab, from the garage on the west to the outside of the house on ...
4 votes
2 answers
209 views

Two circuits in same junction box when each circuits originates from two different subpanels

I would like to install two switches in the same gang box, but each switch would be on a separate circuit. The issue I have is that the two circuits originate from separate subpanels. Is this OK to do?...
  • 99
2 votes
2 answers
133 views

Sub Panel Power Loss While Feeder Breaker From Main Still Has Voltage

Bought an order home with a 200 amp service. In the main panel is a 100 amp breaker that goes to a sub panel in a workshop out back. In the workshop there's two 20 amp breakers on one side and a two ...
3 votes
3 answers
483 views

Powering an outdoor condenser through a service receptacle box using 1/2" EMT

I'm installing a mini-split and the outdoor condenser requires a 15A circuit. I have installed a sub-panel about 10 ft away on the same outdoor wall. I'm planning to use the 15A breaker in the panel ...
9 votes
1 answer
234 views

Do the EGC and GEC both terminate at grounding bar in new sub-panel in detached building (garage)?

Edit: My rough location: Grand Rapids, Michigan, USA There are a million questions and youtube videos on the topic, and I'm sure one of them clearly answers this question because it seems so ...
2 votes
2 answers
603 views

What's the proper way to extend wiring into a replacement panelboard?

I'm planning a replacement of a 1960s-vintage subpanel in my home's garage/garage apartment. Power feed from the service entrance is through EMT, which I'll have to use as the grounding means as it's ...
  • 307
3 votes
1 answer
78 views

Can I convert a 30A sub-panel to a regular 120 circuit?

I have a small 30A sub-panel that once powered a green house, some lights and 1 regular 120V outlet. We have since removed the greenhouse and it's associated wiring and now the sub panel is an eyesore ...
  • 31
1 vote
2 answers
82 views

Land #8 THHN wires on a lug rated for #4 - 2/0

I'm installing a subpanel on the outside of my house. It is a "Siemens SN Series 125 Amp 12-Space 12-Circuit Outdoor Main Lug Plug-On Neutral Load Center". The main lugs are rated for 2/0 to ...
2 votes
2 answers
202 views

Can a whole house surge suppressor be installed in a sub panel?

The situation: I am looking to install a whole-house surge suppressor as part of my electrical upgrade. I'll be going from a 100a to 200a service, moving the meter location, changing from an overhead ...
  • 35.4k
1 vote
3 answers
198 views

Is it a code violation to use a 50A plug/outlets as a transfer switch alternative? If so, is there an NEC compliant option?

Edit--this appears to be a duplicate of this question, which remains unanswered. Summary: I'm trying to find a way to feed a 50A load panel from two different sources, each with an existing neutral/...
1 vote
2 answers
74 views

Grounding conversion for 200 amp sub panel

My direct bury feed is a little over 200 feet. I used 4/0 4/0 4/0 4/0 wire. I understand I need to isolate the ground from the neutral. This requires a grounding bar addition to my 200 amp QO sub/...
0 votes
1 answer
57 views

Can I add two sub panels from my main 200 amp panel? [closed]

I have a 200 amp main panel and need to add two 100 amp sub panels in my new shop and connected guest quarters. The panels would be placed next to each other in the same room. My main 200 amp panel ...
  • 1
4 votes
3 answers
917 views

Can I jump 120V across legs to power both sides of a panel?

I have installed a new sub-panel in our barn. We do not need a lot of power so I only ran 8/2 copper. My intention was to make the sub-panel 120v only by using a jumper for the second hot lug. Now I’m ...
  • 41
0 votes
0 answers
26 views

Would you be willing to review my 100a Sub Panel Plan? [duplicate]

Seeking an experienced person to review the attached schematic for my 100a sub panel - which will be in an adjacent detached garage. I am comfortable working with my hands and doing the wiring. But ...
2 votes
2 answers
98 views

Correct Wire for 125a subpanel

I have a 125a subpanel in a shed that is used for all the pool equipment (control panel, pump, spa, lights). I don't really need anywhere near 125a but since I have 3 double pole breakers I would be ...
  • 21
1 vote
1 answer
62 views

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 ...
3 votes
1 answer
143 views

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 ...
1 vote
2 answers
88 views

Is #6 wire suitable for a hot tub circuit?

I am installing a 60ft run with #4 AWG within 1" EMT from main panel to an exterior subpanel that contains a 60Amp GFCI. I plan to do a grounding rod at that location, even though it is not ...
  • 13
0 votes
1 answer
94 views

Is my wiring to subpanel adequate?

Here’s where I am at. I have a metal shop building about 160 feet from my main panel. I have a 400 amp service. I ran 2 inch pvc conduit about 36” deep. My wire is 3 wire 2awg use 2 aluminum with ...
1 vote
0 answers
58 views

Schedule 40 PVC into threaded conduit hub on top of panel?

I'm surface mounting this NEMA 3R rated Eaton BR Loadcenter outside. I will be feeding it using 1 1/4" Schedule 40 PVC conduit from above. Can I use a 1 1/4" PVC Male Terminal Adapter and ...
1 vote
2 answers
186 views

How to route #8 THHN wires into an existing panel

I have a main panel in my garage, with an existing sub-panel mounted right next to it. I want to add a new sub-panel at the opposite side of my house and need to run three #8 THHN and a #10 THHN into ...
0 votes
2 answers
72 views

Can I ground a sub-panel with a wire from the main panel in the same structure?

I have a three-wire cable feeding a 60A sub panel from the main panel. Will a separate wire from the main panel to the sub-panel suffice for the ground or neutral in the sub? Separation of ground and ...
  • 1
0 votes
1 answer
48 views

voltage on ground wire when sub panel is bonded and short to ground

I have a main 200 amp feeder panel which is bonded. It feeds a separate 200 amp distribution panel with about 30 circuit breakers which is also bonded. That situation existed since house was built 12 ...
0 votes
0 answers
61 views

Is a service conductor not part of the service?

In Article 100, titled Definitions, of the 2020 Edition of the National Electric Code, the definition of premises wiring includes "wiring from the service point" to the outlets. The other ...
1 vote
3 answers
207 views

Subpanel is fed from Main Panel service lug and subpanels neutral and ground bars are bounded. Does not seem up to code

Images of the situation: https://imgur.com/a/icvh3Yk The previous home owner had this panel installed, or did it himself. It appears he just connected 4AWG cable to the main lug and fed that into the ...
1 vote
2 answers
100 views

ITE EQ Load Center neutral / ground update

Here’s an update on the main panel neutral issues that I raised originally in another question. I relabeled the photo, and made a diagram to show the problem. This post restates the issue, I hope more ...
  • 370
1 vote
2 answers
121 views

Sub-Panel Neutral and Ground

I think this panel wiring is pretty messed up but I want to confirm I'm looking at it correctly. My house is from 1960 and has mostly the original ungrounded wiring (2-wire cloth NM) for branch ...
  • 11
3 votes
2 answers
287 views

ITE EQ Load Center neutral / ground questions #3

In my 200A ITE main panel there's a feed to a 100-amp sub-panel that’s elsewhere in the basement, via a 100-amp breaker at the bottom of the main panel. The photo shows the wire (#1 AL, I think) and ...
  • 370

1
2 3 4 5
14