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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118 views

Can I feed a sub panel off my 200A service box? Or would I need to run wire from the inside breaker box?

Can I add a sub panel feed off my 200A service box? If so what are the requirements? Or would I need to run it from the main house breaker inside the house and wire from there? I currently have a ...
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1answer
139 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.). ...
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1answer
60 views

30Amp Sub Panel for EV Charger

Need 240V 20AMPs in detached garage for 16 AMP Level 2 EV Charger (Chevy Spark) at my MIL's home. 1200 sqft House, has a 100 AMP Panel. Furnace, Dryer, and Stove are Gas. All circuits are 20AMPs, and ...
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2answers
64 views

Where Should the Sub Panel Go? What Size Wire?

Been lurking for awhile getting ready to install a 60 amp sub-panel for my back yard. I have everything I need figured out except for three important items as I get conflicting stories depending on ...
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1answer
72 views

Wiring a new shop advice

I am having a new shop built on Friday.The shop is located 250 feet from my power meter. For a 240 volt 100 amp service in the shop, the online calculator says I need 2/0 AWG Aluminum or 1AWG copper....
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2answers
101 views

Is a 60 amp breaker adequate for a 220v sub-panel to my garage?

150 panel in house. I want to run a 220 (sub-panel) feed to garage 25 feet away for 10,000 watt electric heater. There's room in the 150 panel. Would 60 amp breaker in the garage meet the 1.25 safety ...
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1answer
107 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 ...
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0answers
55 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 ...
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0answers
109 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 ...
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0answers
48 views

what size wire do i need to ground sub panels together?

What size wire do I need to properly ground 2 sub panels together in Washington state? I have 2awg running panel to panel but don't know what size ground wire to install
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1answer
229 views

How to handle unattached ground wires in boiler fusebox/control panel (sub-panel?)?

I don't have enough of an understanding of HVAC to know if the pictured boiler fuse box is considered a control panel or a sub-panel - but some wiring issues there lead me to needing to understand ...
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0answers
856 views

Breaker to outdoor Sub panel keep tripping

Need help with my outdoor kitchen fridge. A 20 amp fuse at the main box goes takes a 10/2 w/ground wire to a sub panel. The sub panel has two 15 amp breakers circuit one goes to a storage shed via ...
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746 views

Feeder type and size for 60 amp. subpanel

Is it possible/recommended to use E18679 (UL) ROMEX SIMPull AWG 6 CU 3 with AWG 10 ground Type NM-B 600 volts as feeder from a 60 amp breaker to install a subpanel? Subpanel will be located in ...
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0answers
74 views

Sub Panel Remote Control?

I would like to know if it is possible to have a relay control power to a sub panel? I am thinking of wiring a cottage with most of the lights in one sub panel. I would like to be able to power this ...
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196 views

Sub panel cable feed code

The inspector failed the sub panel box location because it only had 6 feet clearance and not 6.5. The electricians came and moved the sub panel box, but they did not run a new feed cable. They put a ...
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0answers
41k views

What size wire do I need for a 100amp underground 300 ft run?

I want to put in a 100amp subpanel in my garage. The run will be underground and 300ft long. I have a Siemens panel with breakers rated at 60/75 deg C. What is the proper wire size I need? I was ...
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2answers
587 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 ...
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49 views

Putting a sub panel for a home office/bedroom?

Recently, our neighborhood had a power outage for a few days. Causing my office/bedroom to lose power completely which was a bit of an inconvenience. Out of curiosity, I began googling about ...
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2answers
83 views

3 wire existing feed, not connected to main panel. Do I bond ground and neutral

I have a detached garage that has a 3 wire feed, powered from a separate 100amp disconnect from the main panel. Originally the old box had the ground and neutrals together on the same bar. I ...
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22 views

Need help to Determine the Size a Subpanel

The subpanel will have ac/spa/220v plug. 30+50+40=120 amp Want would be the main breaker for amperage? 100 or 125 amperage? I know the panel will be a 125 amp but I don't want a too big panel on the ...
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111 views

What size wire for a 60A sub-panel at 185 feet?

I have a 200 amp panel in my house. I want to run electric 185 feet buried and put in 60 amp sub panel in garage. I'm hoping this will give me 4 15 amp breakers in garage. What size wire do I need?
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26 views

Pool heater hook up

The main panel in my house is 200 amp. I installed a 100 amp subpanel in my garage. Can I put a double-pole 50 amp breaker in my 100 amp subpanel for a pool heater?
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39 views

50 amp breaker for Range on a 60 amp sub panel

I have s 60 amp sub panel that powers only 3 20 amp circuits. Can I add a 50 amp breaker for my range?
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28 views

Installing a 50 amp sub panel

Can I install a 50amp sub panel to a detached garage if I only have 3 wires running? Just bought the house and wire is already there.
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36 views

GFCI Breaker Serving GFCI Receptacles Tripping in Extreme Fog and Cold

Lately, I have had an issue where sometime during the night the main GFCI breaker would trip. The only thing different on the nights that this happened was that one of the nights was (1) extremely ...
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36 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
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1answer
996 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 ...
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854 views

What size wire should i use for a 125 foot underground run to a garden shed

I want to run a buried 125' line to a 30A subpanel in my garden shed. I will only be running hand tools and lighting. Was planning on using 12/3 from the house to the subpanel. Does that sound like ...
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1answer
504 views

Adding electrical service to detached garage

Please let me know if this sounds correct- Sub panel fed from 80amp breaker in main building 200amp load center. Roughly 75' of 1" PVC conduit from existing load panel, under existing timber deck, ...