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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2answers
93 views

Advice on running power to a shed

I have a 200 amp service panel, and I calculate I am using about 160 amps. (I used a formula I found online that takes the square footage of the house and then adds from there) The new 160 sqft shed ...
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2answers
57 views

How do you properly use metal conduit as a ground?

I have read here that metal conduit can be used as the ground and you needn't then pull a separate ground wire: What are the NEC rules governing this? How do you avoid "weak ground" links ...
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0answers
33 views

Wire gauge needed for outbuilding with welder

I have a standalone building that I'm going to start welding and doing other metal work out of. When looking over the current wiring I came across a wild shock that all I could do was laugh. The ...
3
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3answers
532 views

Should I run RMC all the way from panel to sub-panel, or are there cheaper options?

I am running a 60 amp circuit to a shed about 100 feet from our main panel. I'll be running 3 #6 copper wires in a 3/4" rigid metal conduit down a trench with 6 inches of cover (hand dug, and I ...
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1answer
53 views

Adding a 110v circuit off 220v spa wiring

I have a hot tub installed with 4-wire 50 amp service, with the GFCI 2-pole breaker at the main panel, and a simple non-fused pull disconnect switch subpanel near the hot tub. I want to split off a ...
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3answers
67 views

Move neutrals to subpanel or leave them on main?

I have a 150A Square D QO panel that is full and won't allow for tandem circuits. I'm going to take out the bottom 2 breakers and replace them with a 100a breaker to feed a subpanel via 4AWG copper ...
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3answers
64 views

What size subpanel and wire do I need for a swimming pool?

I need to install a 100A subpanel for an in ground swimming pool. The main panel is in the garage and subpanel will be mounted on exterior of house about 30’ away. The subpanel will be more than ...
9
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3answers
1k views

Are there safety concerns or code violations with my garage sub-panel?

I recently bought a home and the garage has this sub panel that looks questionable to me. The garage has a circuit for 240v, and two other circuits that consists of two 120v wall outlets, and two 120v ...
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3answers
123 views

How to wire subpanel back to back for portable generator

I bought a 12Kw Pulsar G12KBN portable generator with a 50Amp outlet to power my house and my 4ton AC during Louisiana storm seasons (last year we had 6 storms) and I'm looking for best recommendation ...
3
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1answer
51 views

Two Separate Electrical Services (Meters), Disconnecting One and Making Subpanel

The property I've been renovating has two separate meters. One on the house and one on a detached garage that used to be an automotive shop. I recently upgraded the house to a 200amp service (has ...
2
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1answer
35 views

Sub Panel feed to existing garage

I am wanting to upgrade a garage by putting in a larger 10 space sub panel with a 60 amp feed from the house. I plan to use a 4 wire assembly of #6 copper USE-2 conductors direct buried from house to ...
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0answers
25 views

Main to Sub to oven w/ detours

I have owned the house I’m living in for 20 years. There’s a subpanel in the back yard where a spa used to sit. It is fed by a 50-amp breaker in the main service. I got rid of the spa and I built a ...
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0answers
68 views

Is there a way to add a sub panel to my detached garage?

My main panel is full and I am trying to get electric in my detached garage with a sub panel but am unsure of any ways to do. My current main panel is an old Pushmatic and I’ve seen tandems for it but ...
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1answer
77 views

Power issues in out-building sub panel - What's the best way to repair?

I am having electrical issues in my out-building shop. I think I might have an idea of what is wrong, but I want to hear others opinions, and I also want to know the best method of repair. I will try ...
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2answers
143 views

Add a 80/100 amp subpanel to 125 amp main, or upgrade service/panel?

I have a 125 amp main panel (configuration below) for my 1250 sq ft, 2 story townhouse, and want to update my kitchen outlets have dedicated circuits for fridge, dishwasher, garbage disposal and ...
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2answers
53 views

Can I run two sets of 10/3 30amp wire to feed one panel?

I have a shed that I want to supply power too. Can I run 2 sets of 10/3 30amp cable to one panel? Or does each cable have to have its own panel? Approximate wire length will be 45 foot. I already ...
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0answers
33 views

What 110V breaker to use to supply a 220V supply to a 100A sub-panel

I have a shed that is wired for the following : two 110V lights, 2 110V outlets + a 220V outlet for a Welder (60A). I am trying to figure out what size breakers to use to supply power. I will be ...
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5answers
2k views

subpanel breaker tripped as well as main breaker - should I be concerned?

All... My garage had only one outlet so I extended it using surface raceways. Like a dummy, I did not turn off the breaker when I started the installation of the raceway. "I know what I'm doing ...
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1answer
44 views

Should I Install a sub-panel, IN PLACE OF of an unused hot tub disconnect, for a basement project, and will I need to change the main breaker?

I have removed the hot tub disconnect and pulled the 4 wire (6G) back into the basement. This line comes from the main breaker panel on a 2-pole 50A breaker. My plan is to instal a basement sub-...
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3answers
72 views

What's the current input from each leg of a portable generator into my main panel?

I am connecting a portable generator to my electric sub-panel in my garage. My generator is a 6kw running watt unit with a 30amp 220 volt output. I will be using this connection (L14-30) to a box ...
2
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1answer
71 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
68 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
98 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
33 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
598 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
195 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
98 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
54 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
416 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
50 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 ...
3
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2answers
95 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 ...
1
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1answer
94 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
75 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
79 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
51 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
71 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 ...
0
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2answers
70 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
96 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
60 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 ...
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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
58 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 ...
0
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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 ...
1
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2answers
57 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
891 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
85 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
1k 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
94 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 ...
3
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3answers
192 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
52 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 ...

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