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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2
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1answer
57 views

What size wire and pipe for a 125A subpanel in an attached carport?

I realize this/these questions have been asked a million times before on this forum, but I appreciate any help that will help me drill down on exactly what materials I need and what I need to do. ...
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1answer
59 views

Max amperage for “neutral tie strap” in daisy chained Siemens panel

200 amp service. We have a service disconnect upstream of our main panel, which effectively means our neutrals and grounds are still isolated in our main panel (as one does when setting up a sub panel)...
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2answers
91 views

Can I convert 2 two-pole 60A breakers into 3 two-pole 40A breakers

Considering a new electric tankless water heater. But my 18yr old existing subpanel doesn't match what most new heaters use. Any help on the best way to go about this would be great. TIA UPDATE: ...
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0answers
23 views

Prep for installing sub panel in attached garage

I recently built a three car garage attached to the side of my house with a slab on grade foundation. It replaced an earlier single car garage built in the 1920s that was detached and about 15' from ...
7
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2answers
587 views

Sub panel install issue

I had a sub panel installed recently. The plan was that i will be installing my own breakers. The sub is running off of the main about 25 feet away in my garage. I understand that the ground and ...
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0answers
31 views

240V on all 120v outlets and ceilings lights [duplicate]

In a remote studio have a Sub-Pannel with Multimeter readings. With No Circuit Breakers In Place (L1 to N 120v) (L2 to N 120v) (L1 to G 120v) (L2 to G 120v) (L1 to L2 240v) (N to G 0v) slim type ...
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3answers
82 views

Where do I attach the Ground and Neutral inside a sub-panel?

I'm wiring 100 amp subpanel to detached Garage with 2/2/2/4 copper. I'm hoping to replace the subpanel to my detached garage which was previously wired to run on a 40 or 60 amp subpanel with like 6 ...
2
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1answer
79 views

Can I use an existing range circuit for a new sub-panel?

Lots of good information out there but wanted to confirm that what I'm learning is accurate and also ask a little about aluminum wiring. Context/Background I'm finishing my basement (one bedroom, an ...
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1answer
52 views

Turning on GFCI breaker on subpanel trips main breaker

I have a subpanel feeding off a 50 amp breaker. The subpanel contains a GFCI 50 amp breaker which is connected to a new 32amp spa heater. When I flip the GFCI breaker on for the heater, it immediately ...
3
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4answers
368 views

Help choosing an outbuilding sub-panel

I'm wiring a shed to use as an insulated tech workshop. A 20A circuit for 10 outlets, 15A for lights, and a 20A for a mini-split A/C. My main breaker appears to be 150A. Should I just match the 150A ...
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1answer
47 views

Want to add sub-panel in my barn - 115v, 60amp?

I'm looking to extend the dedicated electrical in my barn to a new sub-panel near where I will be placing hobbyist wood working power tools - miter saw, route, jointer, small lathe, table saw, etc and ...
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2answers
84 views

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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1answer
58 views

Is there a minimum height for a small sub-panel?

A few years ago I installed a very small sub-panel for hot tub and one outlet. The panel is mounted on a stem wall outdoors about 1.5' off the ground. It only has 2 breakers in it: a 240volt for the ...
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2answers
70 views

100 Amp Shed Workshop from 200 Amp House Panel 120' Direct Bury Cable [closed]

I am interested in some advice/support on installing a 100 Amp Main Breaker Sub Panel approximately 120' from my 200Amp Main Panel in my basement. I have a background and experience in electrical ...
3
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1answer
67 views

Sub panel feeder circuit wire sizing

I’m planning to upgrade the service in a detached garage, which is currently fed by a single 15amp circuit, and I wanted to confirm that I have my circuit sizing correct. The existing circuit runs ...
0
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1answer
48 views

Do I need to add grounding and replace breakers at my sub-panel?

I doubt this is legal for the most part, but I have a 240v subpanel on my insulated tiny house, shed whatever you wanna call it. Right now it's my office, but a while back I set it up with a 240v 30 ...
2
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3answers
62 views

Calculating subpanel breaker size

I'm building out a shop (within the same building as the main panel) and I'm considering adding a sub panel to make running circuits easier, and to make any future expansion easier. I'm unsure how to ...
1
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2answers
69 views

Power jumping from one hot to another

I ran 2 4/0 lines to a new horse barn from our shop to a sub-panel. The sub-panel has a ground rod. When the breakers are off the volt meter on each 4/0 line reads 120 but as soon as you turn any ...
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4answers
92 views

What type of electrical supply is this? (Canada)

I'm interested in buying a home-energy monitoring product, the type with current sensors that clamp onto one or more main electrical feed wires. In order to determine what products would work, and ...
3
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1answer
58 views

Grounding branch circuits in gutter instead of in panel

Replacing a sub panel (with neutral from main panel and local ground rod). The branch circuits will come in via a Wiegmann gutter above the subpanel. Is there an issue having a grounding bar in the ...
1
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1answer
53 views

Can you feed a sub panel from a timer for outside lights?

I have a Intermatic 240v 30 amp timer and would like to feed a sub panel with (6) 120v 15 amp outlets for Christmas light
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0answers
51 views

Need advise about fixing/replacing shed fuse box

I have an old house with a detached shed and a damaged fuse box I'm planning on replacing. There are 3 wires going to the shed and a metal water line between the shed. I'm planning on replacing the ...
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0answers
31 views

i have a pool heater to install the elect lists 208/240-575 vac 60hz 3 phase i have 175 ft from main panel what size sub panel and size wire to feed?

I am going to install a separate sub panel for my pool. currently have a double 60 breaker supplying power to the pool pumps and am not sure if i can upgrade the current feed to accommodate the heater ...
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2answers
54 views

Subpanel breaker sizing in detached shed with electrical feed from breaker in main house panel

I want to feed 240V 30A from a new 30A breaker in my home main electric panel to a new subpanel in a adetached shed. The electric feed I want to use for the new subpanel is (4) 10awg THWN wires (R/B/...
6
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3answers
830 views

Garage upgrade from 20 AMP to 50 AMP

I bought a house recently and I have some experience with electrical but I am not fully sure what would be the best course of action since I've never had a detached garage where the cable would be ...
2
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2answers
54 views

Minimum distance between main panel and feeder?

I'm running very short on space in my main panel. And I'm adding a second mini split air conditioner right now that needs another 240v breaker, and would eat the last space in my panel. Rather than ...
5
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3answers
970 views

Will #2 copper THHN be sufficient cable to run to the subpanel?

I have a 200 Amp Main panel. I have an outbuilding 150 ft away in which I need to install a sub-panel. I proposed to install a 200 amp sub-panel so if sometime in the future we choose to get a ...
2
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2answers
75 views

Can I use an existing Ground Rod for Sub-Panel in Detached Garage (Meter box is using the rod currently)

Two buildings: Home and Detached Garage (circa '04 US). Service comes in through a Meter on the Garage to a PVC conduit into the Main box in the home (Single phase 240V with Neutral). In the main box ...
4
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3answers
117 views

Max load on a 30Amp Sub Panel

1st post so go easy :-) and hoping someone can help. I am currently investigating the feasibility of this and whether to approach an electrician on it (i.e. is it even possible without massive rework)...
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0answers
49 views

Subpanel dilemma: Supply has no neutral

I have a 30x40 shop building detached from my home. I am upgrading the shop's subpanel when I noticed that the line from the house's main breaker panel does not include a neutral. Just two hots and a ...
0
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1answer
57 views

Can I tie grounded/white and ground/bare from a subpanel to any grounding bar in in the main panel?

Suppose I'm wiring a 100 A subpanel, which receives my two phase wires (black, red/black), my grounded/neutral wire (white), and my ground wire (bare) from the main panel. Since this is a subpanel, ...
0
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1answer
66 views

Reusing old service wires from electric furnace to mini-split

EDIT to answer replies: @3phaseeel 30-amp wires are 6 AWG aluminum, 50-amp wires are 4 AWG aluminum. The sheathed wires run along the garage roof truss overhead (see picture), exposed for about 28 ...
3
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2answers
338 views

Is conduit required when running a short distance to an adjacent 60 amp subpanel?

I am installing a surface mounted 60 amp subpanel 5 inches to the right of my current surface mounted main panel. For the short run, can I use 6/3 non-metallic cable w/ground between the two panels ...
1
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0answers
117 views

Is it ok to run a 100 amp sub panel off a 150 amp main panel?

I'm installing a GE 100 Amp MLO panel about 50 feet from the main panel in a different building that's about 700 sq/ft. I'm pulling three #3 in 1-1/4" PVC with a #6 ground. The main is a 150 ...
0
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0answers
67 views

How should I handle grounding & neutral bonding when replacing my sub-panel?

Current subpanel was installed in the early 70s. We think we need to replace it as lights are not working (very dim, flickering/fading in/out) - we suspect an open neutral. How do we wire in a new ...
0
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1answer
35 views

Is 10/3 @ 240 with ground good enough for a short run from sub panel to sauna heater?

I'm no pro, so I'm sorry in advance for doing my own work, but I enjoy the learning and experience. I've run aluminum 4/3 out to a new sauna with a sub-panel, roughly 100', which houses 2x single pole ...
1
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2answers
167 views

How to secure supply wires to panel

I'm installing a subpanel that is fed by 3 #1 conductors and a #4 ground (Al, XHHW-2, individual wires). I would like to use a 2-piece clamp to secure to the subpanel and to protect the wires from ...
1
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3answers
98 views

What is the maximum sub-panel amperage I can use, and is my setup okay?

I would like to install a sub-panel in a garage by running cable underground. I have 60' of 2-2-2-4 aluminum service entrance cable -- gray jacket, 3 conductors insulated. While I have 60', the ...
3
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2answers
799 views

Wiring of a metal detached garage?

I am looking to add power to my detached metal (enclosed carport) garage. With that said I am trying to figure out the most economical solution to wiring the garage. I would like to run the wire like ...
2
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1answer
155 views

How to find a neutral to ground short on my main panel

I've just installed a subpanel in my attached garage. The rough in has passed inspection, however my main panel has standard breakers and has never had fault finding interrupter breakers in it, and ...
2
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1answer
39 views

Is AFCI required for detached workshop subpanel?

As I read the 2014 NEC 210.12 AFCI protection is only required for a "dwelling unit", which would not include a detached workshop. Is that interpretation correct?
0
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1answer
36 views

Can sunpanel be mounted to horizontal 2x4?

I read that subpanels should be mounted to a 3/4" backer board or secured directly to a stud. Can I nail two 2x4s horizontally between two studs and secure the panel to those?
1
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1answer
100 views

What component do I need to add my own “Private” electric meter

I am adding a workshop, and upgrading my service from 200A to 400A. The Shop will get a 200A panel and the existing House panel will be backfed from the main. I want to bring the new House feeder ...
9
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4answers
1k views

Can I run 275ft underground cable to pole barn?

I have a new 1500 sqft pole barn that needs electric. I expect to need 100Amp service at the barn which will have a 220V 15A compressor and 220V 25A welder. The rest of the barn will be 110V ...
0
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1answer
89 views

Main panel grounding

I have installed a 200 Amp meter upgraded from the old 60 amp and then installed a 200 disconnect with a breaker type switch inside then feeding 200 amp main panel. My question is do I bond neutral ...
1
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2answers
79 views

How do I properly size the ground wire for a subpanel?

What is the general rule for sizing ground wire relative to the conductors? I know I saw this somewhere on here, but I cannot find it. I'm running aluminum (#1 AWG aluminum) to my subpanel and I'd ...
0
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1answer
64 views

Bare neutral to subpanel in detached garage

I have an old house with a detached garage. There is power to the detached garage through a 3-conductor cable that is routed above ground. Power from my house comes from the power pole, to my house. ...
1
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2answers
72 views

How do I add 2 AFCI circuits to my panel?

My electrical inspector told me I have too many devices on my basement circuit. Which is accurate :) I need 2 additional AFCI circuits for: laundry room and basement receptacles. Problem is, my panel ...
1
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1answer
281 views

Do I use the Siemens Type Q Breaker in ITE Blueline Loadcenter panel?

I'm looking for compatible breakers for my old ITE Blueline Loadcenter main panel. I believe ITE was bought by Siemens. Would the Siemens 100A 2 Pole 120/240V Type Q Breaker (https://www.homedepot....
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1answer
70 views

Is there a proper way to fill an electrical panel?

I'm installing a subpanel and will submite a panel schedule with my permit application. I have never installed a panel before, so I wonder if there is a proper way to install the breakers. Should ...

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