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
7
votes
3answers
613 views

Sub panel neutral and ground not bonded so why continuity between them?

I have a 125A GE PowerMark Gold Load Center "subpanel" at my detached garage. Subpanel has 2 hots, one neutral with no "connected" ground between panels. The subpanel ground bus ...
2
votes
0answers
35 views

Hot tub wiring plan - does my plan check out?

I'm looking for feedback on my electrical plans for a hot tub install. The space is in a 7 unit building located in NYC. The apartment is owned, not rented. I am planning on hiring an electrician for ...
0
votes
2answers
53 views

Can this panel have a main shutoff switch installed on it?

I'm thinking about connecting an additional 240v circuit to the panel in my apartment (7 apartments in the building, NYC) but the panel has no main shutoff breaker installed on it. I believe that the ...
5
votes
1answer
310 views

Ground wires absent from circuits exiting apartment panel

I'm taking a look at the (only) panel in my apartment (7 apartments in building, NYC) and I'm noticing that out of all the circuits leaving the panel, not a single one of them contains a ground wire. ...
2
votes
2answers
149 views

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 ...
0
votes
0answers
63 views

How can I reverse my breaker box cover panel ? Opens the wrong direction

I have a square D load center - HOMC12UC. You can install it with the door opening in either direction, since there are identical punchouts in the top and bottom. However, my installer wasn't ...
1
vote
2answers
98 views

Does my plan for 240V subpanel to planned shed 200' away sound reasonable?

We are building a path and stairs from our cabin to the lake which is about 200' away. Eventually I plan to build a shed to store Kayaks. In the short term I want lighting at the lake. Other than ...
1
vote
1answer
72 views

Subpanel capacity

I will be installing a 125A subpanel using a #2 Cu THHN via 2" x 3"(L) conduit secured with four 2-in conduit locknuts (inside and outside of panels). The sub-panel shut-off will be a Q2125 ...
3
votes
5answers
136 views

How can I add a 50AMP breaker for a NEMA 14-50 outlet to my panel?

I have two 150amp panels, both with sub-panels installed. I need to add a 50amp breaker for an electrical vehicle charging port. I'm looking for the best way to do this, with what I have available. ...
0
votes
1answer
46 views

Can I put the sub-panel for my attached garage in the attic?

I want to install a 30A outlet in my garage for my 240v compressor along with a 20A outlet for other tools. I will run a 6/3 w/g NM from a 50A dual pole breaker at the main panel at the other end of ...
-1
votes
2answers
70 views

What's the wire size needed to supply a 125amp sub panel? [closed]

Will #6 stranded CU THHN be sufficient to supply a 125amp 12 space 24 circuit sub panel that is 80 feet away?
5
votes
2answers
454 views

Replacing subpanel that was fed with 3 wires

A contractor replaced my subpanel with a new one, and will come back for other work and inspection. (Old subpanel is Federal Pacific.) My home is in California, built in early 1980s. The subpanel is ...
1
vote
2answers
45 views

Outbuilding branched from LOAD side of GFCI

I’m usually not this guy, but I’d love to outline my plan and get opinions of what the red flags might be. My treehouse is almost done. It started as a primitive shelter, but is becoming more of a ...
1
vote
1answer
39 views

Feeding single circuit from two different subpanels (with interlock)

I have a main panel and a critical loads sub-panel fed by a PV inverter + battery backup. I need to avoid overloading the normal capacity in the critical loads panel (50A), and I'm already at a ...
0
votes
1answer
46 views

70 amp sub panel wire size

I am setting up a 70 amp sub panel in my detached garage, about 800 sq ft, from a 100 amp main panel, would a 2-3 copper wire be strong enough to support this? the run from main to sub is about 110 ft....
0
votes
1answer
44 views

Is it possible/recommended to use AFCI/GFCI breakers when replacing subpanel?

I'm replacing my old subpanel. (It was from Federal Pacific.) I'm not rewiring my home. And I understand that I'm not required to use AFCI/GFCI breakers. Is it possible to use AFCI/GFCI breakers with ...
1
vote
1answer
46 views

Is it required to use AFCI/GFCI breaker when replacing subpanel?

I'm replacing my subpanel at home. My jurisdiction adopts NEC 2017. When replacing a subpanel, is it required to have CAFCI on all circuit breakers for all 120V circuits? When replacing a subpanel, ...
1
vote
2answers
89 views

Why are ground and neutral bonded at the main panel?

I realize that the only time the grounds and neutrals can be bonded is in a main panel, not a sub-panel. What I can't figure out is why could it be allowed in the first place? What were to happen if ...
0
votes
1answer
64 views

3 wire conductor to an electrical subpanel - Can I add a separate conductor for neutral in same conduit?

I'm installing a subpanel to bring power to a garage. Answers to similar questions make it clear that a subpanel must isolate ground from neutral, so the bonding screw will be removed at the subpanel....
0
votes
2answers
60 views

What type of wire should I use for about 80ft run to a She Shed in 1" conduit for a 60 AMP subpanel. Can I use 6-6-6-6 Gray Stranded AL SER Cable?

I want to run electric to my wife's She Shed. I am thinking a 60 AMP service is what I want. What type of wire should I use for about 80ft in 1" conduit. Can I use 6-6-6-6 Gray Stranded AL SER ...
7
votes
2answers
791 views

Was this installed to code and is it still to code?

In 1995 an electrician who was also a friend of the family helped me out by installing a sub panel in my garage. He tapped the feeder cable directly into the main lugs in the main box and ran them to ...
1
vote
0answers
34 views

Running power to a sub panel for a shed

So a friend of mine wants power to his shed for a tv, a small portable ac unit and some lights. I told him a 60 amp sub panel would be best just in case of expansion. So the issue is that from the ...
1
vote
3answers
110 views

Should I use SER or URD cable for a 100 amp sub-panel?

I am running a new line from my main panel on the pole out to a sub panel in my shop. The sub panel will be 100amp. I have a 180' run and have buried 1-1/2" sch40 conduit. I'm planning on using 1/...
2
votes
2answers
50 views

4awg Al on ground bar with 6awg max holes

Im adding a subpanel, I installed a tgl2 (GE) ground bar that take 6awg max, my ser is a 2-2-2-4. Is there a way I can use this ground bar with a 4awg Al ? Also do I need to use some type of grease on ...
0
votes
0answers
35 views

Grounding new branch circuits in an existing subpanel

Barn A contains the main panel. Barn B has a subpanel fed from Barn A via (3) 2-0 aluminum conductors, 2 hot and 1 neutral, with a 60amp breaker in the main panel. There is no grounding conductor ...
0
votes
2answers
88 views

6/3 Wire to a 100 amp sub panel, how many breakers?

I have a 100 amp sub panel being fed a 6/3 cable. The main Panel has a two pole 60 amp breakers. How many breakers can I have, or how many amps can I have? All the outlets/receptacles will be 120v. ...
2
votes
1answer
65 views

100A subpanel to workshop

I'm building a shed that will be housing a washer, dryer, hot water heater, and a freezer. The dryer and water heater both require 220V 30A and will be used concurrently. The washer and freezer use ...
0
votes
1answer
59 views

What size wire and breaker do I need for my shed/workshop?

I am looking to run electricity to my shed and I am unsure of what size wire and breaker I need. My main panel will be about 100ft away from my shed. My shed is 12X20 and I want to install 6-8 4ft 4 ...
0
votes
1answer
57 views

Can I Install a Sub-Panel from an Existing NEMA 5-50 Plug?

I have a NEMA 5-50 outlet wired from my main panel all the way down to where I am installing a garage. It was put in by the previous owner for a welder I believe. NEMA 5-50 is quite unique and hard to ...
3
votes
1answer
99 views

adding new circuit to generator subpanel without a ground bar

I have a main Square D panel with a post-installed Generac (Siemens) subpanel with automatic transfer switch to standby generator. I want to add a new 15A circuit to the subpanel so I can move a ...
1
vote
2answers
55 views

Can I use a well pump cable to supply a sub-panel?

I have a pump cable (red, yellow, black, green) going from my house (in buried conduit) to my garage. It comes from a 200 amp service box on a 240v 30amp breaker. Previous owner was going to put in ...
2
votes
2answers
116 views

Installing Outlet for Welder; Possible Dual Use for RV

I'm doing some electrical upgrades to my garage/workshop with upstairs apartment; I'm going to be replacing its 1960s-vintage subpanel which is fed by #4 wire from a 200 amp service entrance panel (on ...
0
votes
1answer
69 views

Can I reuse the aluminum feeder wire when I replace a sub-panel?

I'm rewiring my 1957 house because there was no ground. I have a main panel and a subpanel in the crawlspace that currently only give power to the gas furnace. I want to add the air conditioner on the ...
1
vote
1answer
53 views

Is a sub panel necessary to wire this 10.5kw 43.75amp sauna heater?

We're planning on installing this Harvia Cilindro 10.5kW Electric Sauna Heater (Model HPC11-U1H) when it gets here. The manual wants us to put a 50amp breaker in the main panel, and then run that to ...
6
votes
3answers
402 views

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 ...
1
vote
2answers
62 views

Trying to find a way to shut the power off in the detached garage without having to go back to the house to turn off the breakers

Each wire is already ran and hooked up to lights and outlets it was ran underground with pvc in to the detached garage
2
votes
3answers
72 views

Does the ground bar on a subpanel need to be bonded to the subpanel?

I had a lightning strike near my house that damaged the electric in my shed and now I need to replace the subpanel. I have a question about the groundbar. In the subpanel I am replacing the grouond ...
1
vote
1answer
94 views

Grounding for sub panel breaker

We have an old cabin with 4 fuses in the main 60 amp panel, and a sub panel with a handful of breakers. The sub panel is fed by 3 wires instead of the modern 4. The 4 fuses are all wired with 2 wire ...
0
votes
1answer
37 views

Can I hook up a subpanel to an existing 220 line that isn't in use?

When our house was built, they put a 220 line in for future pool equipment. The pool equipment ended up going on the other side of the house, so this line just terminates in a box unused. I want to ...
3
votes
2answers
518 views

What are my options for running cable from surface-mount sub-panel in garage?

I'm building a new garage, mostly on my own. I hired an electrician to run cable and install a sub-panel, which was completed yesterday. Today it passed inspection. Next step is running cable for ...
0
votes
0answers
28 views

is it expensive or necessary to relocate the sub panel from my bathroom to another room in my small condo?

My inspector stated it was an area of concern that my sub panel is located in my bathroom and should have it relocated to another room due to possible moisture getting in; Is this something I should ...
1
vote
0answers
32 views

Shed Electric help

I just built a shed. I have extra 10 Awg wire given to me. I would like to run 3 wires of 10 gauge to my shed (all i have left) and use a 30 amp breaker. Do i need to put a 30 amp service in to ...
2
votes
1answer
84 views

Can I use an insulated ground wire in a sub-panel?

I'm running a new sub-panel to my basement (the main panel is in the garage). I bought a 500' spool of 6 AWG THHN. The distance to the sub-panel is about 110' so I cut the spool into 4 x 125' lengths. ...
3
votes
1answer
96 views

How should I terminate this wiring and install a new outlet?

We bought a house with a old main panel and previous owners installed a sub panel in the garage they also had two very large dryer size outlets one in the wall and as expected and one nailed to a 2x4. ...
0
votes
1answer
63 views

sub panel issues

I am adding a 50 amp sub panel to my shed. I am using thwn 6 awg wire in pvc conduit 2 hots 1 neutral 1 ground. I have installed a ground rod to sub in shed also. Here are the questions I have conduit ...
1
vote
1answer
54 views

Is grounding the subpanel not required some times

Is the sub panel properly grounded, only Load and Neutral wiring were located at the sub panel as shown below. This Sub panel is at a single floor Condo, built 1970, Updated with Newer Electrical ...
2
votes
1answer
101 views

Bought a new (old) house and a new subpanel for the pool was installed. No clue if this is safe

I bought a house and prior to the sale a subpanel was installed at the pool area. The home inspector says it’s fine, but he really wasn’t there to make sure things are code compliant. Before I hire ...
0
votes
0answers
45 views

Voltage detector goes off for no reason

Circuit at breaker box is 30amps. Ground is free standing not connected to neutral or ground bar. The outlet is removed presently with no wires touching each other or anything else near the outlet box....
0
votes
2answers
69 views

30amp 2 breaker sub panel

Hooking up power to a shed only going to have a few receptacles and a light. I have 30 amp power close by where I use to use for a camper it’s only run off of 120 with 3 wires my question is can I use ...
1
vote
1answer
73 views

Running wire for new subpanel in garage, how to best utilize existing wiring considering the scope of my project?

I have a 200amp main panel in my home, and my garage has a subpanel fed by a two pole 50amp breaker by approximately 85' of 6/3 plus ground cable. I use my garage as a workshop, greenhouse, and office....

1
2 3 4 5
9